Articles | Volume 1, issue 1
https://doi.org/10.5194/soil-1-235-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/soil-1-235-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
The soil N cycle: new insights and key challenges
J. W. van Groenigen
CORRESPONDING AUTHOR
Department of Soil Quality, Wageningen University, P.O. Box 47, 6700AA Wageningen, the Netherlands
D. Huygens
Isotope Bioscience Laboratory (ISOFYS), Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
Instituto Multidisciplinario de Biología Vegetal – IMBIV, Consejo Nacional de Investigaciones Científicas y Técnicas de Argentina, Universidad Nacional de Córdoba, Casilla de Correo 495, 5000 Córdoba, Argentina
Institute of Agricultural Engineering and Soil Science, Faculty of Agricultural Sciences, Universidad Austral de Chile, Valdivia, Chile
P. Boeckx
Isotope Bioscience Laboratory (ISOFYS), Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
Th. W. Kuyper
Department of Soil Quality, Wageningen University, P.O. Box 47, 6700AA Wageningen, the Netherlands
I. M. Lubbers
Department of Soil Quality, Wageningen University, P.O. Box 47, 6700AA Wageningen, the Netherlands
T. Rütting
Department of Earth Sciences, University of Gothenburg, Box 460, 40530 Gothenburg, Sweden
P. M. Groffman
Cary Institute of Ecosystem Studies, 2801 Sharon Turnpike, P.O. Box AB, Millbrook, NY 12545-0129, USA
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Astrid Françoys, Orly Mendoza, Junwei Hu, Pascal Boeckx, Wim Cornelis, Stefaan De Neve, and Steven Sleutel
EGUsphere, https://doi.org/10.5194/egusphere-2024-559, https://doi.org/10.5194/egusphere-2024-559, 2024
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To assess the impact of groundwater table (GWT) depth on soil moisture and C mineralization, we designed a laboratory setup using 200 cm undisturbed soil columns. Surprisingly, the moisture increase induced by a shallower GWT did not result in enhanced C mineralization. We presume this capillary moisture effect was offset by increased C mineralization upon rewetting, particularly noticeable in drier soils when capillary rise affected the topsoil to a lesser extent due to a deeper GWT.
Flossie Brown, Gerd Folberth, Stephen Sitch, Paulo Artaxo, Marijn Bauters, Pascal Boeckx, Alexander W. Cheesman, Matteo Detto, Ninong Komala, Luciana Rizzo, Nestor Rojas, Ines dos Santos Vieira, Steven Turnock, Hans Verbeeck, and Alfonso Zambrano
EGUsphere, https://doi.org/10.5194/egusphere-2023-2937, https://doi.org/10.5194/egusphere-2023-2937, 2024
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Ozone is a pollutant that is detrimental to human and plant health. Ozone monitoring sites in the tropics are limited, so models are often used to assess ozone exposure. We use measurements from the tropics to evaluate ozone from the UK Earth system model, UKESM1. UKESM1 is able to capture the behaviour of ozone in the tropics, except in Southeast Asia. Results demonstrate that UKESM1 can be used for health assessments and highlights areas that would benefit from further observations.
Joseph Okello, Marijn Bauters, Hans Verbeeck, Samuel Bodé, John Kasenene, Astrid Françoys, Till Engelhardt, Klaus Butterbach-Bahl, Ralf Kiese, and Pascal Boeckx
Biogeosciences, 20, 719–735, https://doi.org/10.5194/bg-20-719-2023, https://doi.org/10.5194/bg-20-719-2023, 2023
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The increase in global and regional temperatures has the potential to drive accelerated soil organic carbon losses in tropical forests. We simulated climate warming by translocating intact soil cores from higher to lower elevations. The results revealed increasing temperature sensitivity and decreasing losses of soil organic carbon with increasing elevation. Our results suggest that climate warming may trigger enhanced losses of soil organic carbon from tropical montane forests.
Flossie Brown, Gerd A. Folberth, Stephen Sitch, Susanne Bauer, Marijn Bauters, Pascal Boeckx, Alexander W. Cheesman, Makoto Deushi, Inês Dos Santos Vieira, Corinne Galy-Lacaux, James Haywood, James Keeble, Lina M. Mercado, Fiona M. O'Connor, Naga Oshima, Kostas Tsigaridis, and Hans Verbeeck
Atmos. Chem. Phys., 22, 12331–12352, https://doi.org/10.5194/acp-22-12331-2022, https://doi.org/10.5194/acp-22-12331-2022, 2022
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Surface ozone can decrease plant productivity and impair human health. In this study, we evaluate the change in surface ozone due to climate change over South America and Africa using Earth system models. We find that if the climate were to change according to the worst-case scenario used here, models predict that forested areas in biomass burning locations and urban populations will be at increasing risk of ozone exposure, but other areas will experience a climate benefit.
Caroline C. Clason, Will H. Blake, Nick Selmes, Alex Taylor, Pascal Boeckx, Jessica Kitch, Stephanie C. Mills, Giovanni Baccolo, and Geoffrey E. Millward
The Cryosphere, 15, 5151–5168, https://doi.org/10.5194/tc-15-5151-2021, https://doi.org/10.5194/tc-15-5151-2021, 2021
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Our paper presents results of sample collection and subsequent geochemical analyses from the glaciated Isfallsglaciären catchment in Arctic Sweden. The data suggest that material found on the surface of glaciers,
cryoconite, is very efficient at accumulating products of nuclear fallout transported in the atmosphere following events such as the Chernobyl disaster. We investigate how this compares with samples in the downstream environment and consider potential environmental implications.
Laura Summerauer, Philipp Baumann, Leonardo Ramirez-Lopez, Matti Barthel, Marijn Bauters, Benjamin Bukombe, Mario Reichenbach, Pascal Boeckx, Elizabeth Kearsley, Kristof Van Oost, Bernard Vanlauwe, Dieudonné Chiragaga, Aimé Bisimwa Heri-Kazi, Pieter Moonen, Andrew Sila, Keith Shepherd, Basile Bazirake Mujinya, Eric Van Ranst, Geert Baert, Sebastian Doetterl, and Johan Six
SOIL, 7, 693–715, https://doi.org/10.5194/soil-7-693-2021, https://doi.org/10.5194/soil-7-693-2021, 2021
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We present a soil mid-infrared library with over 1800 samples from central Africa in order to facilitate soil analyses of this highly understudied yet critical area. Together with an existing continental library, we demonstrate a regional analysis and geographical extrapolation to predict total carbon and nitrogen. Our results show accurate predictions and highlight the value that the data contribute to existing libraries. Our library is openly available for public use and for expansion.
Heleen Deroo, Masuda Akter, Samuel Bodé, Orly Mendoza, Haichao Li, Pascal Boeckx, and Steven Sleutel
Biogeosciences, 18, 5035–5051, https://doi.org/10.5194/bg-18-5035-2021, https://doi.org/10.5194/bg-18-5035-2021, 2021
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We assessed if and how incorporation of exogenous organic carbon (OC) such as straw could affect decomposition of native soil organic carbon (SOC) under different irrigation regimes. Addition of exogenous OC promoted dissolution of native SOC, partly because of increased Fe reduction, leading to more net release of Fe-bound SOC. Yet, there was no proportionate priming of SOC-derived DOC mineralisation. Water-saving irrigation can retard both priming of SOC dissolution and mineralisation.
Sebastian Doetterl, Rodrigue K. Asifiwe, Geert Baert, Fernando Bamba, Marijn Bauters, Pascal Boeckx, Benjamin Bukombe, Georg Cadisch, Matthew Cooper, Landry N. Cizungu, Alison Hoyt, Clovis Kabaseke, Karsten Kalbitz, Laurent Kidinda, Annina Maier, Moritz Mainka, Julia Mayrock, Daniel Muhindo, Basile B. Mujinya, Serge M. Mukotanyi, Leon Nabahungu, Mario Reichenbach, Boris Rewald, Johan Six, Anna Stegmann, Laura Summerauer, Robin Unseld, Bernard Vanlauwe, Kristof Van Oost, Kris Verheyen, Cordula Vogel, Florian Wilken, and Peter Fiener
Earth Syst. Sci. Data, 13, 4133–4153, https://doi.org/10.5194/essd-13-4133-2021, https://doi.org/10.5194/essd-13-4133-2021, 2021
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The African Tropics are hotspots of modern-day land use change and are of great relevance for the global carbon cycle. Here, we present data collected as part of the DFG-funded project TropSOC along topographic, land use, and geochemical gradients in the eastern Congo Basin and the Albertine Rift. Our database contains spatial and temporal data on soil, vegetation, environmental properties, and land management collected from 136 pristine tropical forest and cropland plots between 2017 and 2020.
Simon Baumgartner, Marijn Bauters, Matti Barthel, Travis W. Drake, Landry C. Ntaboba, Basile M. Bazirake, Johan Six, Pascal Boeckx, and Kristof Van Oost
SOIL, 7, 83–94, https://doi.org/10.5194/soil-7-83-2021, https://doi.org/10.5194/soil-7-83-2021, 2021
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We compared stable isotope signatures of soil profiles in different forest ecosystems within the Congo Basin to assess ecosystem-level differences in N cycling, and we examined the local effect of topography on the isotopic signature of soil N. Soil δ15N profiles indicated that the N cycling in in the montane forest is more closed, whereas the lowland forest and Miombo woodland experienced a more open N cycle. Topography only alters soil δ15N values in forests with high erosional forces.
Paula Alejandra Lamprea Pineda, Marijn Bauters, Hans Verbeeck, Selene Baez, Matti Barthel, Samuel Bodé, and Pascal Boeckx
Biogeosciences, 18, 413–421, https://doi.org/10.5194/bg-18-413-2021, https://doi.org/10.5194/bg-18-413-2021, 2021
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Tropical forest soils are an important source and sink of greenhouse gases (GHGs) with tropical montane forests having been poorly studied. In this pilot study, we explored soil fluxes of CO2, CH4, and N2O in an Ecuadorian neotropical montane forest, where a net consumption of N2O at higher altitudes was observed. Our results highlight the importance of short-term variations in N2O and provide arguments and insights for future, more detailed studies on GHG fluxes from montane forest soils.
Simon Baumgartner, Matti Barthel, Travis William Drake, Marijn Bauters, Isaac Ahanamungu Makelele, John Kalume Mugula, Laura Summerauer, Nora Gallarotti, Landry Cizungu Ntaboba, Kristof Van Oost, Pascal Boeckx, Sebastian Doetterl, Roland Anton Werner, and Johan Six
Biogeosciences, 17, 6207–6218, https://doi.org/10.5194/bg-17-6207-2020, https://doi.org/10.5194/bg-17-6207-2020, 2020
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Soil respiration is an important carbon flux and key process determining the net ecosystem production of terrestrial ecosystems. The Congo Basin lacks studies quantifying carbon fluxes. We measured soil CO2 fluxes from different forest types in the Congo Basin and were able to show that, even though soil CO2 fluxes are similarly high in lowland and montane forests, the drivers were different: soil moisture in montane forests and C availability in the lowland forests.
Hannes P. T. De Deurwaerder, Marco D. Visser, Matteo Detto, Pascal Boeckx, Félicien Meunier, Kathrin Kuehnhammer, Ruth-Kristina Magh, John D. Marshall, Lixin Wang, Liangju Zhao, and Hans Verbeeck
Biogeosciences, 17, 4853–4870, https://doi.org/10.5194/bg-17-4853-2020, https://doi.org/10.5194/bg-17-4853-2020, 2020
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The depths at which plants take up water is challenging to observe directly. To do so, scientists have relied on measuring the isotopic composition of xylem water as this provides information on the water’s source. Our work shows that this isotopic composition changes throughout the day, which complicates the interpretation of the water’s source and has been currently overlooked. We build a model to help understand the origin of these composition changes and their consequences for science.
Maha Deeb, Peter M. Groffman, Manuel Blouin, Sara Perl Egendorf, Alan Vergnes, Viacheslav Vasenev, Donna L. Cao, Daniel Walsh, Tatiana Morin, and Geoffroy Séré
SOIL, 6, 413–434, https://doi.org/10.5194/soil-6-413-2020, https://doi.org/10.5194/soil-6-413-2020, 2020
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The goal of this study was to discuss current methods to create soils adapted for various green infrastructure (GI) designs. Investigating these new soils for several design categories of GI will provide technical information for management and design agencies. Moreover, these studies can serve as pioneer experiments to prevent recurring errors and, thus, provide improved plant growth practices. Results show that these constructed soils have a high potential to provide multiple soil functions.
Long Ho, Ruben Jerves-Cobo, Matti Barthel, Johan Six, Samuel Bode, Pascal Boeckx, and Peter Goethals
Biogeosciences Discuss., https://doi.org/10.5194/bg-2020-311, https://doi.org/10.5194/bg-2020-311, 2020
Revised manuscript not accepted
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Rivers are being polluted by human activities, especially in urban areas. We studied the greenhouse gas (GHG) emissions from an urban river system. The results showed a clear trend between water quality and GHG emissions in which the more polluted the sites were, the higher were their emissions. When river water quality worsened, its contribution to global warming can go up by 10 times. Urban rivers emitted 4-times more than of the amount of GHGs compared to rivers in natural sites.
Marco Pfeiffer, José Padarian, Rodrigo Osorio, Nelson Bustamante, Guillermo Federico Olmedo, Mario Guevara, Felipe Aburto, Francisco Albornoz, Monica Antilén, Elías Araya, Eduardo Arellano, Maialen Barret, Juan Barrera, Pascal Boeckx, Margarita Briceño, Sally Bunning, Lea Cabrol, Manuel Casanova, Pablo Cornejo, Fabio Corradini, Gustavo Curaqueo, Sebastian Doetterl, Paola Duran, Mauricio Escudey, Angelina Espinoza, Samuel Francke, Juan Pablo Fuentes, Marcel Fuentes, Gonzalo Gajardo, Rafael García, Audrey Gallaud, Mauricio Galleguillos, Andrés Gomez, Marcela Hidalgo, Jorge Ivelic-Sáez, Lwando Mashalaba, Francisco Matus, Francisco Meza, Maria de la Luz Mora, Jorge Mora, Cristina Muñoz, Pablo Norambuena, Carolina Olivera, Carlos Ovalle, Marcelo Panichini, Aníbal Pauchard, Jorge F. Pérez-Quezada, Sergio Radic, José Ramirez, Nicolás Riveras, Germán Ruiz, Osvaldo Salazar, Iván Salgado, Oscar Seguel, Maria Sepúlveda, Carlos Sierra, Yasna Tapia, Francisco Tapia, Balfredo Toledo, José Miguel Torrico, Susana Valle, Ronald Vargas, Michael Wolff, and Erick Zagal
Earth Syst. Sci. Data, 12, 457–468, https://doi.org/10.5194/essd-12-457-2020, https://doi.org/10.5194/essd-12-457-2020, 2020
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The CHLSOC database is the biggest soil organic carbon (SOC) database that has been compiled for Chile yet, comprising 13 612 data points. This database is the product of the compilation of numerous sources including unpublished and difficult-to-access data, allowing us to fill numerous spatial gaps where no SOC estimates were publicly available before. The values of SOC compiled in CHLSOC have a wide range, reflecting the variety of ecosystems that exists in Chile.
Daniel D. Richter, Sharon A. Billings, Peter M. Groffman, Eugene F. Kelly, Kathleen A. Lohse, William H. McDowell, Timothy S. White, Suzanne Anderson, Dennis D. Baldocchi, Steve Banwart, Susan Brantley, Jean J. Braun, Zachary S. Brecheisen, Charles W. Cook, Hilairy E. Hartnett, Sarah E. Hobbie, Jerome Gaillardet, Esteban Jobbagy, Hermann F. Jungkunst, Clare E. Kazanski, Jagdish Krishnaswamy, Daniel Markewitz, Katherine O'Neill, Clifford S. Riebe, Paul Schroeder, Christina Siebe, Whendee L. Silver, Aaron Thompson, Anne Verhoef, and Ganlin Zhang
Biogeosciences, 15, 4815–4832, https://doi.org/10.5194/bg-15-4815-2018, https://doi.org/10.5194/bg-15-4815-2018, 2018
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As knowledge in biology and geology explodes, science becomes increasingly specialized. Given the overlap of the environmental sciences, however, the explosion in knowledge inevitably creates opportunities for interconnecting the biogeosciences. Here, 30 scientists emphasize the opportunities for biogeoscience collaborations across the world’s remarkable long-term environmental research networks that can advance science and engage larger scientific and public audiences.
Natalie Orlowski, Lutz Breuer, Nicolas Angeli, Pascal Boeckx, Christophe Brumbt, Craig S. Cook, Maren Dubbert, Jens Dyckmans, Barbora Gallagher, Benjamin Gralher, Barbara Herbstritt, Pedro Hervé-Fernández, Christophe Hissler, Paul Koeniger, Arnaud Legout, Chandelle Joan Macdonald, Carlos Oyarzún, Regine Redelstein, Christof Seidler, Rolf Siegwolf, Christine Stumpp, Simon Thomsen, Markus Weiler, Christiane Werner, and Jeffrey J. McDonnell
Hydrol. Earth Syst. Sci., 22, 3619–3637, https://doi.org/10.5194/hess-22-3619-2018, https://doi.org/10.5194/hess-22-3619-2018, 2018
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To extract water from soils for isotopic analysis, cryogenic water extraction is the most widely used removal technique. This work presents results from a worldwide laboratory intercomparison test of cryogenic extraction systems. Our results showed large differences in retrieved isotopic signatures among participating laboratories linked to interactions between soil type and properties, system setup, extraction efficiency, extraction system leaks, and each lab’s internal accuracy.
Roland Baatz, Pamela L. Sullivan, Li Li, Samantha R. Weintraub, Henry W. Loescher, Michael Mirtl, Peter M. Groffman, Diana H. Wall, Michael Young, Tim White, Hang Wen, Steffen Zacharias, Ingolf Kühn, Jianwu Tang, Jérôme Gaillardet, Isabelle Braud, Alejandro N. Flores, Praveen Kumar, Henry Lin, Teamrat Ghezzehei, Julia Jones, Henry L. Gholz, Harry Vereecken, and Kris Van Looy
Earth Syst. Dynam., 9, 593–609, https://doi.org/10.5194/esd-9-593-2018, https://doi.org/10.5194/esd-9-593-2018, 2018
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Focusing on the usage of integrated models and in situ Earth observatory networks, three challenges are identified to advance understanding of ESD, in particular to strengthen links between biotic and abiotic, and above- and below-ground processes. We propose developing a model platform for interdisciplinary usage, to formalize current network infrastructure based on complementarities and operational synergies, and to extend the reanalysis concept to the ecosystem and critical zone.
Marijn Bauters, Hans Verbeeck, Miro Demol, Stijn Bruneel, Cys Taveirne, Dries Van der Heyden, Landry Cizungu, and Pascal Boeckx
Biogeosciences, 14, 5313–5321, https://doi.org/10.5194/bg-14-5313-2017, https://doi.org/10.5194/bg-14-5313-2017, 2017
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We assessed community-weighted functional canopy traits and indicative δ15N shifts along two new altitudinal transects in the tropical forest biome of both South America and Africa. We found that the functional forest composition and δ15N response along both transects was parallel, with a species shift towards more nitrogen-conservative species at higher elevations.
Dane Dickinson, Samuel Bodé, and Pascal Boeckx
Atmos. Meas. Tech., 10, 4507–4519, https://doi.org/10.5194/amt-10-4507-2017, https://doi.org/10.5194/amt-10-4507-2017, 2017
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Cavity ring-down spectroscopy (CRDS) is an increasingly popular technology for isotope analysis of trace gases. However, most commercial CRDS instruments are designed for continuous gas sampling and cannot reliably measure small discrete samples. We present a novel technical adaptation that allows routine analysis of 50 mL syringed samples on an isotopic-CO2 CRDS unit. Our method offers excellent accuracy and precision, fast sample throughput, and is easily implemented in other CRDS instruments.
Lien De Wispelaere, Samuel Bodé, Pedro Hervé-Fernández, Andreas Hemp, Dirk Verschuren, and Pascal Boeckx
Biogeosciences, 14, 73–88, https://doi.org/10.5194/bg-14-73-2017, https://doi.org/10.5194/bg-14-73-2017, 2017
Louise C. Andresen, Anna-Karin Björsne, Samuel Bodé, Leif Klemedtsson, Pascal Boeckx, and Tobias Rütting
SOIL, 2, 433–442, https://doi.org/10.5194/soil-2-433-2016, https://doi.org/10.5194/soil-2-433-2016, 2016
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In soil the constant transport of nitrogen (N) containing compounds from soil organic matter and debris out into the soil water, is controlled by soil microbes and enzymes that literally cut down polymers (such as proteins) into single amino acids (AA), hereafter microbes consume AAs and excrete ammonium back to the soil. We developed a method for analysing N turnover and flow of organic N, based on parallel 15N tracing experiments. The numerical model gives robust and simultaneous quantification.
L. C. Andresen, S. Bode, A. Tietema, P. Boeckx, and T. Rütting
SOIL, 1, 341–349, https://doi.org/10.5194/soil-1-341-2015, https://doi.org/10.5194/soil-1-341-2015, 2015
S. Doetterl, J.-T. Cornelis, J. Six, S. Bodé, S. Opfergelt, P. Boeckx, and K. Van Oost
Biogeosciences, 12, 1357–1371, https://doi.org/10.5194/bg-12-1357-2015, https://doi.org/10.5194/bg-12-1357-2015, 2015
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We link the mineralogy of soils affected by erosion and deposition to the distribution of soil carbon fractions, their turnover and microbial activity. We show that the weathering status of soils and their history are controlling the stabilization of carbon with minerals. After burial, aggregated C is preserved more efficiently while non-aggregated C can be released and younger C re-sequestered more easily. Weathering changes the effectiveness of stabilization mechanism limiting this C sink.
D. Xue, P. Boeckx, and Z. Wang
Biogeosciences, 11, 5957–5967, https://doi.org/10.5194/bg-11-5957-2014, https://doi.org/10.5194/bg-11-5957-2014, 2014
R. M. Rees, J. Augustin, G. Alberti, B. C. Ball, P. Boeckx, A. Cantarel, S. Castaldi, N. Chirinda, B. Chojnicki, M. Giebels, H. Gordon, B. Grosz, L. Horvath, R. Juszczak, Å. Kasimir Klemedtsson, L. Klemedtsson, S. Medinets, A. Machon, F. Mapanda, J. Nyamangara, J. E. Olesen, D. S. Reay, L. Sanchez, A. Sanz Cobena, K. A. Smith, A. Sowerby, M. Sommer, J. F. Soussana, M. Stenberg, C. F. E. Topp, O. van Cleemput, A. Vallejo, C. A. Watson, and M. Wuta
Biogeosciences, 10, 2671–2682, https://doi.org/10.5194/bg-10-2671-2013, https://doi.org/10.5194/bg-10-2671-2013, 2013
N. Gharahi Ghehi, C. Werner, K. Hufkens, R. Kiese, E. Van Ranst, D. Nsabimana, G. Wallin, L. Klemedtsson, K. Butterbach-Bahl, and P. Boeckx
Biogeosciences Discuss., https://doi.org/10.5194/bgd-10-1483-2013, https://doi.org/10.5194/bgd-10-1483-2013, 2013
Revised manuscript not accepted
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Cover crops improve soil structure and change organic carbon distribution in macroaggregate fractions
Soil carbon, nitrogen, and phosphorus storage in juniper–oak savanna: role of vegetation and geology
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Contrasting potential for biological N2 fixation at three polluted central European Sphagnum peat bogs: combining the 15N2-tracer and natural-abundance isotope approaches
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Microbial activity responses to water stress in agricultural soils from simple and complex crop rotations
The role of geochemistry in organic carbon stabilization against microbial decomposition in tropical rainforest soils
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Aluminous clay and pedogenic Fe oxides modulate aggregation and related carbon contents in soils of the humid tropics
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Norman Gentsch, Florin Laura Riechers, Jens Boy, Dörte Schweneker, Ulf Feuerstein, Diana Heuermann, and Georg Guggenberger
SOIL, 10, 139–150, https://doi.org/10.5194/soil-10-139-2024, https://doi.org/10.5194/soil-10-139-2024, 2024
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Cover crops have substantial impacts on soil properties, but so far it is not clear how long a legacy effect of cover cropping will remain in the soil. We found that cover crops attenuate negative effects on soil structure that come from soil cultivation. The combination of plants with different litter qualities and rhizodeposits in biodiverse cover crop mixtures can improve the positive effects of cover cropping on soil structure amelioration.
Che-Jen Hsiao, Pedro A. M. Leite, Ayumi Hyodo, and Thomas W. Boutton
SOIL, 10, 93–108, https://doi.org/10.5194/soil-10-93-2024, https://doi.org/10.5194/soil-10-93-2024, 2024
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Tree cover has increased in grasslands worldwide, with juniper and oak trees expanding in the southern Great Plains, USA. Here, we examine how these changes interact with geology to affect soil C, N, and P storage. Soil concentrations of these elements were significantly higher under trees than grasslands but increased more under trees growing on Edwards soils. Our results suggest that geology and vegetation change should be considered when predicting soil storage in dryland ecosystems globally.
David S. McLagan, Carina Esser, Lorenz Schwab, Jan G. Wiederhold, Jan-Helge Richard, and Harald Biester
SOIL, 10, 77–92, https://doi.org/10.5194/soil-10-77-2024, https://doi.org/10.5194/soil-10-77-2024, 2024
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Sorption of mercury in soils, aquifer materials, and sediments is primarily linked to organic matter. Using column experiments, mercury concentration, speciation, and stable isotope analyses, we show that large quantities of mercury in soil water and groundwater can be sorbed to inorganic minerals; sorption to the solid phase favours lighter isotopes. Data provide important insights on the transport and fate of mercury in soil–groundwater systems and particularly in low-organic-matter systems.
Marketa Stepanova, Martin Novak, Bohuslava Cejkova, Ivana Jackova, Frantisek Buzek, Frantisek Veselovsky, Jan Curik, Eva Prechova, Arnost Komarek, and Leona Bohdalkova
SOIL, 9, 623–640, https://doi.org/10.5194/soil-9-623-2023, https://doi.org/10.5194/soil-9-623-2023, 2023
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Biological N2 fixation helps to sustain carbon accumulation in peatlands and to remove CO2 from the atmosphere. Changes in N2 fixation may affect the dynamics of global change. Increasing inputs of reactive N from air pollution should lead to downregulation of N2 fixation. Data from three N-polluted peat bogs show an interplay of N2-fixation rates with 10 potential drivers of this process. N2 fixation was measurable only at one site characterized by high phosphorus and low sulfate availability.
Tatjana C. Speckert, Jeannine Suremann, Konstantin Gavazov, Maria J. Santos, Frank Hagedorn, and Guido L. B. Wiesenberg
SOIL, 9, 609–621, https://doi.org/10.5194/soil-9-609-2023, https://doi.org/10.5194/soil-9-609-2023, 2023
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Soil organic carbon (SOC) is key player in the global carbon cycle. Afforestation on pastures potentially alters organic matter input and SOC sequestration. We investigated the effects of a Picea abies L. afforestation sequence (0 to 130 years) on a former subalpine pasture on SOC stocks and dynamics. We found no difference in the SOC stock after 130 years of afforestation and thus no additional SOC sequestration. SOC composition was altered due to a modified SOC input following afforestation.
Johan Six, Sebastian Doetterl, Moritz Laub, Claude Raoul Müller, and Marijn Van de Broek
EGUsphere, https://doi.org/10.5194/egusphere-2023-2221, https://doi.org/10.5194/egusphere-2023-2221, 2023
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The sequestration of carbon (C) in soils is seen as a potential mitigation strategy. However, more than 2 decades ago the concept of soil C saturation, which puts a limit to how much C can be stabilized in a soil, emerged. Recently, this concept has been challenged in some studies. Here, we argue that if one pays attention to six fundamental principles when testing for soil C saturation, that the concept is robust and there is effectively a maximum to how much C soil minerals can stabilize.
Sam J. Leuthold, Jocelyn M. Lavallee, Bruno Basso, William F. Brinton, and M. Francesca Cotrufo
EGUsphere, https://doi.org/10.5194/egusphere-2023-2327, https://doi.org/10.5194/egusphere-2023-2327, 2023
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We examined physical soil organic matter fractions to understand their relationship to temporal variability in crop yield at the field scale. We found that interactions between crop productivity, topography, and climate led to variability in soil organic matter stocks among different yield stability zones. Our results imply linkages between soil organic matter and yield stability may be scale-dependent, and that particulate organic matter may be an indicator of unstable areas within croplands.
Lauren M. Gillespie, Nathalie Y. Triches, Diego Abalos, Peter Finke, Sophie Zechmeister-Boltenstern, Stephan Glatzel, and Eugenio Díaz-Pinés
SOIL, 9, 517–531, https://doi.org/10.5194/soil-9-517-2023, https://doi.org/10.5194/soil-9-517-2023, 2023
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Forest soil is potentially an important source or sink of greenhouse gases (CO2, N2O, and CH4), but this is affected by soil conditions. We studied how land inclination and soil/litter properties influence the flux of these gases. CO2 and N2O were more affected by inclination than CH4; all were affected by soil/litter properties. This study underlines the importance of inclination and soil/litter properties in predicting greenhouse gas fluxes from forest soil and potential source–sink balance.
Sastrika Anindita, Peter Finke, and Steven Sleutel
SOIL, 9, 443–459, https://doi.org/10.5194/soil-9-443-2023, https://doi.org/10.5194/soil-9-443-2023, 2023
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This study investigated how land use, through its impact on soil geochemistry, might indirectly control soil organic carbon (SOC) content in tropical volcanic soils in Indonesia. We analyzed SOC fractions, substrate-specific mineralization, and net priming of SOC. Our results indicated that the enhanced formation of aluminum (hydr)oxides promoted aggregation and physical occlusion of OC, which is consistent with the lesser degradability of SOC in agricultural soils.
Amicie A. Delahaie, Pierre Barré, François Baudin, Dominique Arrouays, Antonio Bispo, Line Boulonne, Claire Chenu, Claudy Jolivet, Manuel P. Martin, Céline Ratié, Nicolas P. A. Saby, Florence Savignac, and Lauric Cécillon
SOIL, 9, 209–229, https://doi.org/10.5194/soil-9-209-2023, https://doi.org/10.5194/soil-9-209-2023, 2023
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We characterized organic matter in French soils by analysing samples from the French RMQS network using Rock-Eval thermal analysis. We found that thermal analysis is appropriate to characterize large set of samples (ca. 2000) and provides interpretation references for Rock-Eval parameter values. This shows that organic matter in managed soils is on average more oxidized and more thermally stable and that some Rock-Eval parameters are good proxies for organic matter biogeochemical stability.
Britta Greenshields, Barbara von der Lühe, Harold J. Hughes, Christian Stiegler, Suria Tarigan, Aiyen Tjoa, and Daniela Sauer
SOIL, 9, 169–188, https://doi.org/10.5194/soil-9-169-2023, https://doi.org/10.5194/soil-9-169-2023, 2023
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Silicon (Si) research could provide complementary measures in sustainably cultivating oil-palm monocultures. Our study shows that current oil-palm management practices and topsoil erosion on oil-palm plantations in Indonesia have caused a spatial distribution of essential Si pools in soil. A lack of well-balanced Si levels in topsoil could negatively affect crop yield and soil fertility for future replanting at the same plantation site. Potential measures are suggested to maintain Si cycling.
Kenji Fujisaki, Tiphaine Chevallier, Antonio Bispo, Jean-Baptiste Laurent, François Thevenin, Lydie Chapuis-Lardy, Rémi Cardinael, Christine Le Bas, Vincent Freycon, Fabrice Bénédet, Vincent Blanfort, Michel Brossard, Marie Tella, and Julien Demenois
SOIL, 9, 89–100, https://doi.org/10.5194/soil-9-89-2023, https://doi.org/10.5194/soil-9-89-2023, 2023
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This paper presents a first comprehensive thesaurus for management practices driving soil organic carbon (SOC) storage. So far, a comprehensive thesaurus of management practices in agriculture and forestry has been lacking. It will help to merge datasets, a promising way to evaluate the impacts of management practices in agriculture and forestry on SOC. Identifying the drivers of SOC stock changes is of utmost importance to contribute to global challenges (climate change, food security).
Oliver van Straaten, Larissa Kulp, Guntars O. Martinson, Dan Paul Zederer, and Ulrike Talkner
SOIL, 9, 39–54, https://doi.org/10.5194/soil-9-39-2023, https://doi.org/10.5194/soil-9-39-2023, 2023
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Across northern Europe, millions of hectares of forest have been limed to counteract soil acidification and restore forest ecosystems. In this study, we investigated how restorative liming affects the forest soil organic carbon (SOC) stocks and correspondingly ecosystem greenhouse gas fluxes. We found that the magnitude and direction of SOC stock changes hinge on the inherent site characteristics, namely, forest type, soil texture, initial soil pH, and initial soil SOC stocks (before liming).
Junxiao Pan, Jinsong Wang, Dashuan Tian, Ruiyang Zhang, Yang Li, Lei Song, Jiaming Yang, Chunxue Wei, and Shuli Niu
SOIL, 8, 687–698, https://doi.org/10.5194/soil-8-687-2022, https://doi.org/10.5194/soil-8-687-2022, 2022
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We found that climatic, edaphic, plant and microbial variables jointly affect soil inorganic carbon (SIC) stock in Tibetan grasslands, and biotic factors have a larger contribution than abiotic factors to the variation in SIC stock. The effects of microbial and plant variables on SIC stock weakened with soil depth, while the effects of edaphic variables strengthened. The contrasting responses and drivers of SIC stock highlight differential mechanisms underlying SIC preservation with soil depth.
Yifeng Zhang, Sen Dou, Batande Sinovuyo Ndzelu, Rui Ma, Dandan Zhang, Xiaowei Zhang, Shufen Ye, and Hongrui Wang
SOIL, 8, 605–619, https://doi.org/10.5194/soil-8-605-2022, https://doi.org/10.5194/soil-8-605-2022, 2022
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How to effectively convert corn straw into humic substances and return them to the soil in a relatively stable form is a concerning topic. Through a 360 d field experiment under equal carbon (C) mass, we found that return of the fermented corn straw treated with Trichoderma reesei to the field is more valuable and conducive to increasing easily oxidizable organic C, humus C content, and carbon pool management index than the direct application of corn straw.
Ling Mao, Shaoming Ye, and Shengqiang Wang
SOIL, 8, 487–505, https://doi.org/10.5194/soil-8-487-2022, https://doi.org/10.5194/soil-8-487-2022, 2022
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Soil ecological stoichiometry offers a tool to explore the distribution, cycling, limitation, and balance of chemical elements. This study improved the understanding of soil organic carbon and nutrient dynamics in tea plantation ecosystems and also provided supplementary information for soil ecological stoichiometry in global terrestrial ecosystems.
Steffen Schlüter, Tim Roussety, Lena Rohe, Vusal Guliyev, Evgenia Blagodatskaya, and Thomas Reitz
SOIL, 8, 253–267, https://doi.org/10.5194/soil-8-253-2022, https://doi.org/10.5194/soil-8-253-2022, 2022
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We combined microstructure analysis via X-ray CT with carbon mineralization analysis via respirometry of intact soil cores from different land uses. We found that the amount of particulate organic matter (POM) exerted a dominant control on carbon mineralization in well-aerated topsoils, whereas soil moisture and macroporosity did not play role. This is because carbon mineralization mainly occurs in microbial hotspots around degrading POM, where it is decoupled from conditions of the bulk soil.
Roberta Pulcher, Enrico Balugani, Maurizio Ventura, Nicolas Greggio, and Diego Marazza
SOIL, 8, 199–211, https://doi.org/10.5194/soil-8-199-2022, https://doi.org/10.5194/soil-8-199-2022, 2022
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Biochar, a solid product from the thermal conversion of biomass, can be used as a climate change mitigation strategy, since it can sequester carbon from the atmosphere and store it in the soil. The aim of this study is to assess the potential of biochar as a mitigation strategy in the long term, by modelling the results obtained from an 8-year field experiment. As far as we know, this is the first time that a model for biochar degradation has been validated with long-term field data.
Daniel Rath, Nathaniel Bogie, Leonardo Deiss, Sanjai J. Parikh, Daoyuan Wang, Samantha Ying, Nicole Tautges, Asmeret Asefaw Berhe, Teamrat A. Ghezzehei, and Kate M. Scow
SOIL, 8, 59–83, https://doi.org/10.5194/soil-8-59-2022, https://doi.org/10.5194/soil-8-59-2022, 2022
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Storing C in subsoils can help mitigate climate change, but this requires a better understanding of subsoil C dynamics. We investigated changes in subsoil C storage under a combination of compost, cover crops (WCC), and mineral fertilizer and found that systems with compost + WCC had ~19 Mg/ha more C after 25 years. This increase was attributed to increased transport of soluble C and nutrients via WCC root pores and demonstrates the potential for subsoil C storage in tilled agricultural systems.
Zuzana Frkova, Chiara Pistocchi, Yuliya Vystavna, Katerina Capkova, Jiri Dolezal, and Federica Tamburini
SOIL, 8, 1–15, https://doi.org/10.5194/soil-8-1-2022, https://doi.org/10.5194/soil-8-1-2022, 2022
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Phosphorus (P) is essential for life. We studied microbial processes driving the P cycle in soils developed on the same rock but with different ages (0–100 years) in a cold desert. Compared to previous studies under cold climate, we found much slower weathering of P-containing minerals of soil development, likely due to aridity. However, microbes dominate short-term dynamics and progressively redistribute P from the rock into more available forms, making it available for plants at later stages.
Carrie L. Thomas, Boris Jansen, E. Emiel van Loon, and Guido L. B. Wiesenberg
SOIL, 7, 785–809, https://doi.org/10.5194/soil-7-785-2021, https://doi.org/10.5194/soil-7-785-2021, 2021
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Plant organs, such as leaves, contain a variety of chemicals that are eventually deposited into soil and can be useful for studying organic carbon cycling. We performed a systematic review of available data of one type of plant-derived chemical, n-alkanes, to determine patterns of degradation or preservation from the source plant to the soil. We found that while there was degradation in the amount of n-alkanes from plant to soil, some aspects of the chemical signature were preserved.
Benjamin Bukombe, Peter Fiener, Alison M. Hoyt, Laurent K. Kidinda, and Sebastian Doetterl
SOIL, 7, 639–659, https://doi.org/10.5194/soil-7-639-2021, https://doi.org/10.5194/soil-7-639-2021, 2021
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Through a laboratory incubation experiment, we investigated the spatial patterns of specific maximum heterotrophic respiration in tropical African mountain forest soils developed from contrasting parent material along slope gradients. We found distinct differences in soil respiration between soil depths and geochemical regions related to soil fertility and the chemistry of the soil solution. The topographic origin of our samples was not a major determinant of the observed rates of respiration.
Patricia Merdy, Yves Lucas, Bruno Coulomb, Adolpho J. Melfi, and Célia R. Montes
SOIL, 7, 585–594, https://doi.org/10.5194/soil-7-585-2021, https://doi.org/10.5194/soil-7-585-2021, 2021
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Transfer of organic C from topsoil to deeper horizons and the water table is little documented, especially in equatorial environments, despite high primary productivity in the evergreen forest. Using column experiments with podzol soil and a percolating solution sampled in an Amazonian podzol area, we show how the C-rich Bh horizon plays a role in natural organic matter transfer and Si, Fe and Al mobility after a kaolinitic layer transition, thus giving insight to the genesis of tropical podzol.
Jörg Schnecker, D. Boone Meeden, Francisco Calderon, Michel Cavigelli, R. Michael Lehman, Lisa K. Tiemann, and A. Stuart Grandy
SOIL, 7, 547–561, https://doi.org/10.5194/soil-7-547-2021, https://doi.org/10.5194/soil-7-547-2021, 2021
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Drought and flooding challenge agricultural systems and their management globally. Here we investigated the response of soils from long-term agricultural field sites with simple and diverse crop rotations to either drought or flooding. We found that irrespective of crop rotation complexity, soil and microbial properties were more resistant to flooding than to drought and highly resilient to drought and flooding during single or repeated stress pulses.
Mario Reichenbach, Peter Fiener, Gina Garland, Marco Griepentrog, Johan Six, and Sebastian Doetterl
SOIL, 7, 453–475, https://doi.org/10.5194/soil-7-453-2021, https://doi.org/10.5194/soil-7-453-2021, 2021
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In deeply weathered tropical rainforest soils of Africa, we found that patterns of soil organic carbon stocks differ between soils developed from geochemically contrasting parent material due to differences in the abundance of organo-mineral complexes, the presence/absence of chemical stabilization mechanisms of carbon with minerals and the presence of fossil organic carbon from sedimentary rocks. Physical stabilization mechanisms by aggregation provide additional protection of soil carbon.
Fabian Kalks, Gabriel Noren, Carsten W. Mueller, Mirjam Helfrich, Janet Rethemeyer, and Axel Don
SOIL, 7, 347–362, https://doi.org/10.5194/soil-7-347-2021, https://doi.org/10.5194/soil-7-347-2021, 2021
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Sedimentary rocks contain organic carbon that may end up as soil carbon. However, this source of soil carbon is overlooked and has not been quantified sufficiently. We analysed 10 m long sediment cores with three different sedimentary rocks. All sediments contain considerable amounts of geogenic carbon contributing 3 %–12 % to the total soil carbon below 30 cm depth. The low 14C content of geogenic carbon can result in underestimations of soil carbon turnover derived from 14C data.
Maximilian Kirsten, Robert Mikutta, Didas N. Kimaro, Karl-Heinz Feger, and Karsten Kalbitz
SOIL, 7, 363–375, https://doi.org/10.5194/soil-7-363-2021, https://doi.org/10.5194/soil-7-363-2021, 2021
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Mineralogical combinations of aluminous clay and pedogenic Fe oxides revealed significant effects on soil structure and related organic carbon (OC) storage.
The mineralogical combination resulting in the largest aggregate stability does not better preserve OC during conversion of forests into croplands.
Structural changes in the direction of smaller mean weight diameters do not cancel out the stabilizing effect of soil minerals.
Sophie F. von Fromm, Alison M. Hoyt, Markus Lange, Gifty E. Acquah, Ermias Aynekulu, Asmeret Asefaw Berhe, Stephan M. Haefele, Steve P. McGrath, Keith D. Shepherd, Andrew M. Sila, Johan Six, Erick K. Towett, Susan E. Trumbore, Tor-G. Vågen, Elvis Weullow, Leigh A. Winowiecki, and Sebastian Doetterl
SOIL, 7, 305–332, https://doi.org/10.5194/soil-7-305-2021, https://doi.org/10.5194/soil-7-305-2021, 2021
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We investigated various soil and climate properties that influence soil organic carbon (SOC) concentrations in sub-Saharan Africa. Our findings indicate that climate and geochemistry are equally important for explaining SOC variations. The key SOC-controlling factors are broadly similar to those for temperate regions, despite differences in soil development history between the two regions.
Claudia Cagnarini, Stephen Lofts, Luigi Paolo D'Acqui, Jochen Mayer, Roman Grüter, Susan Tandy, Rainer Schulin, Benjamin Costerousse, Simone Orlandini, and Giancarlo Renella
SOIL, 7, 107–123, https://doi.org/10.5194/soil-7-107-2021, https://doi.org/10.5194/soil-7-107-2021, 2021
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Application of organic amendments, although considered a sustainable form of soil fertilisation, may cause an accumulation of trace elements (TEs) in the topsoil. In this research, we analysed the concentration of zinc, copper, lead and cadmium in a > 60-year experiment in Switzerland and showed that the dynamic model IDMM adequately predicted the historical TE concentrations in plots amended with farmyard manure, sewage sludge and compost and produced reasonable concentration trends up to 2100.
Simon Baumgartner, Marijn Bauters, Matti Barthel, Travis W. Drake, Landry C. Ntaboba, Basile M. Bazirake, Johan Six, Pascal Boeckx, and Kristof Van Oost
SOIL, 7, 83–94, https://doi.org/10.5194/soil-7-83-2021, https://doi.org/10.5194/soil-7-83-2021, 2021
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We compared stable isotope signatures of soil profiles in different forest ecosystems within the Congo Basin to assess ecosystem-level differences in N cycling, and we examined the local effect of topography on the isotopic signature of soil N. Soil δ15N profiles indicated that the N cycling in in the montane forest is more closed, whereas the lowland forest and Miombo woodland experienced a more open N cycle. Topography only alters soil δ15N values in forests with high erosional forces.
Rota Wagai, Masako Kajiura, and Maki Asano
SOIL, 6, 597–627, https://doi.org/10.5194/soil-6-597-2020, https://doi.org/10.5194/soil-6-597-2020, 2020
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Global significance of metals (extractable Fe and Al phases) to control organic matter (OM) in recognized. Next key questions include the identification of their localization and mechanism behind OM–metal relationships. Across 23 soils of contrasting mineralogy, Fe and Al phases were mainly associated with microbially processed OM as meso-density microaggregates. OM- and metal-rich nanocomposites with a narrow OM : metal ratio likely acted as binding agents. A new conceptual model was proposed.
Marco Panettieri, Denis Courtier-Murias, Cornelia Rumpel, Marie-France Dignac, Gonzalo Almendros, and Abad Chabbi
SOIL, 6, 435–451, https://doi.org/10.5194/soil-6-435-2020, https://doi.org/10.5194/soil-6-435-2020, 2020
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In the context of global change, soil has been identified as a potential C sink, depending on land-use strategies. This work is devoted to identifying the processes affecting labile soil C pools resulting from changes in land use. We show that the land-use change in ley grassland provoked a decoupling of the storage and degradation processes after the grassland phase. Overall, the study enables us to develop a sufficient understanding of fine-scale C dynamics to refine soil C prediction models.
Miriam Groß-Schmölders, Pascal von Sengbusch, Jan Paul Krüger, Kristy Klein, Axel Birkholz, Jens Leifeld, and Christine Alewell
SOIL, 6, 299–313, https://doi.org/10.5194/soil-6-299-2020, https://doi.org/10.5194/soil-6-299-2020, 2020
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Degradation turns peatlands into a source of CO2. There is no cost- or time-efficient method available for indicating peatland hydrology or the success of restoration. We found that 15N values have a clear link to microbial communities and degradation. We identified trends in natural, drained and rewetted conditions and concluded that 15N depth profiles can act as a reliable and efficient tool for obtaining information on current hydrology, restoration success and drainage history.
Martin Erlandsson Lampa, Harald U. Sverdrup, Kevin H. Bishop, Salim Belyazid, Ali Ameli, and Stephan J. Köhler
SOIL, 6, 231–244, https://doi.org/10.5194/soil-6-231-2020, https://doi.org/10.5194/soil-6-231-2020, 2020
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In this study, we demonstrate how new equations describing base cation release from mineral weathering can reproduce patterns in observations from stream and soil water. This is a major step towards modeling base cation cycling on the catchment scale, which would be valuable for defining the highest sustainable rates of forest harvest and levels of acidifying deposition.
Benjamin Andrieux, David Paré, Julien Beguin, Pierre Grondin, and Yves Bergeron
SOIL, 6, 195–213, https://doi.org/10.5194/soil-6-195-2020, https://doi.org/10.5194/soil-6-195-2020, 2020
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Our study aimed to disentangle the contribution of several drivers to explaining the proportion of soil carbon that can be released to CO2 through microbial respiration. We found that boreal-forest soil chemistry is an important driver of the amount of carbon that microbes can process. Our results emphasize the need to include the effects of soil chemistry into models of carbon cycling to better anticipate the role played by boreal-forest soils in carbon-cycle–climate feedbacks.
Jonathan Sanderman and A. Stuart Grandy
SOIL, 6, 131–144, https://doi.org/10.5194/soil-6-131-2020, https://doi.org/10.5194/soil-6-131-2020, 2020
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Soils contain one of the largest and most dynamic pools of carbon on Earth, yet scientists still struggle to understand the reactivity and fate of soil organic matter upon disturbance. In this study, we found that with increasing thermal stability, the turnover time of organic matter increased from decades to centuries with a concurrent shift in chemical composition. In this proof-of-concept study, we found that ramped thermal analyses can provide new insights for understanding soil carbon.
Carlos Alberto Quesada, Claudia Paz, Erick Oblitas Mendoza, Oliver Lawrence Phillips, Gustavo Saiz, and Jon Lloyd
SOIL, 6, 53–88, https://doi.org/10.5194/soil-6-53-2020, https://doi.org/10.5194/soil-6-53-2020, 2020
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Amazon soils hold as much carbon (C) as is contained in the vegetation. In this work we sampled soils across 8 different Amazonian countries to try to understand which soil properties control current Amazonian soil C concentrations. We confirm previous knowledge that highly developed soils hold C through clay content interactions but also show a previously unreported mechanism of soil C stabilization in the younger Amazonian soil types which hold C through aluminium organic matter interactions.
Songyu Yang, Boris Jansen, Samira Absalah, Rutger L. van Hall, Karsten Kalbitz, and Erik L. H. Cammeraat
SOIL, 6, 1–15, https://doi.org/10.5194/soil-6-1-2020, https://doi.org/10.5194/soil-6-1-2020, 2020
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Soils store large carbon and are important for global warming. We do not know what factors are important for soil carbon storage in the alpine Andes or how they work. We studied how rainfall affects soil carbon storage related to soil structure. We found soil structure is not important, but soil carbon storage and stability controlled by rainfall is dependent on rocks under the soils. The results indicate that we should pay attention to the rocks when we study soil carbon storage in the Andes.
Samuel Bouchoms, Zhengang Wang, Veerle Vanacker, and Kristof Van Oost
SOIL, 5, 367–382, https://doi.org/10.5194/soil-5-367-2019, https://doi.org/10.5194/soil-5-367-2019, 2019
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Soil erosion has detrimental effects on soil fertility which can reduce carbon inputs coming from crops to soils. Our study integrated this effect into a model linking soil organic carbon (SOC) dynamics to erosion and crop productivity. When compared to observations, the inclusion of productivity improved SOC loss predictions. Over centuries, ignoring crop productivity evolution in models could result in underestimating SOC loss and overestimating C exchanged with the atmosphere.
Nicholas P. Rosenstock, Johan Stendahl, Gregory van der Heijden, Lars Lundin, Eric McGivney, Kevin Bishop, and Stefan Löfgren
SOIL, 5, 351–366, https://doi.org/10.5194/soil-5-351-2019, https://doi.org/10.5194/soil-5-351-2019, 2019
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Biofuel harvests from forests involve large removals of available nutrients, necessitating accurate measurements of soil nutrient stocks. We found that dilute hydrochloric acid extractions from soils released far more Ca, Na, and K than classical salt–extracted exchangeable nutrient pools. The size of these acid–extractable pools may indicate that forest ecosystems could sustain greater biomass extractions of Ca, Mg, and K than are predicted from salt–extracted exchangeable base cation pools.
Tiphaine Chevallier, Kenji Fujisaki, Olivier Roupsard, Florian Guidat, Rintaro Kinoshita, Elias de Melo Viginio Filho, Peter Lehner, and Alain Albrecht
SOIL, 5, 315–332, https://doi.org/10.5194/soil-5-315-2019, https://doi.org/10.5194/soil-5-315-2019, 2019
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Soil organic carbon (SOC) is the largest terrestrial C stock. Andosols of volcanic areas hold particularly large stocks (e.g. from 24 to 72 kgC m−2 in the upper 2 m of soil) as determined via MIR spectrometry at our Costa Rican study site: a 1 km2 basin covered by coffee agroforestry. Andic soil properties explained this high variability, which did not correlate with stocks in the upper 20 cm of soil. Topography and pedogenesis are needed to understand the SOC stocks at landscape scales.
Katelyn A. Congreves, Trang Phan, and Richard E. Farrell
SOIL, 5, 265–274, https://doi.org/10.5194/soil-5-265-2019, https://doi.org/10.5194/soil-5-265-2019, 2019
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There are surprising grey areas in the precise quantification of pathways that produce nitrous oxide, a potent greenhouse gas, as influenced by soil moisture. Here, we take a new look at a classic study but use isotopomers as a powerful tool to determine the source pathways of nitrous oxide as regulated by soil moisture. Our results support earlier research, but we contribute scientific advancements by providing models that enable quantifying source partitioning rather than just inferencing.
Eric McGivney, Jon Petter Gustafsson, Salim Belyazid, Therese Zetterberg, and Stefan Löfgren
SOIL, 5, 63–77, https://doi.org/10.5194/soil-5-63-2019, https://doi.org/10.5194/soil-5-63-2019, 2019
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Forest management may lead to long-term soil acidification due to the removal of base cations during harvest. By means of the HD-MINTEQ model, we compared the acidification effects of harvesting with the effects of historical acid rain at three forested sites in Sweden. The effects of harvesting on pH were predicted to be much smaller than those resulting from acid deposition during the 20th century. There were only very small changes in predicted weathering rates due to acid rain or harvest.
Veronika Kronnäs, Cecilia Akselsson, and Salim Belyazid
SOIL, 5, 33–47, https://doi.org/10.5194/soil-5-33-2019, https://doi.org/10.5194/soil-5-33-2019, 2019
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Weathering rates in forest soils are important for sustainable forestry but cannot be measured. In this paper, we have modelled weathering with the commonly used PROFILE model as well as with the dynamic model ForSAFE, better suited to a changing climate with changing human activities but never before tested for weathering calculations. We show that ForSAFE gives comparable weathering rates to PROFILE and that it shows the variation in weathering with time and works well for scenario modelling.
Jon Petter Gustafsson, Salim Belyazid, Eric McGivney, and Stefan Löfgren
SOIL, 4, 237–250, https://doi.org/10.5194/soil-4-237-2018, https://doi.org/10.5194/soil-4-237-2018, 2018
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This paper investigates how different dynamic soil chemistry models describe the processes governing aluminium and base cations in acid soil waters. We find that traditional cation-exchange equations, which are still used in many models, diverge from state-of-the-art complexation submodels such as WHAM, SHM, and NICA-Donnan when large fluctuations in pH or ionic strength occur. In conclusion, the complexation models provide a better basis for the modelling of chemical dynamics in acid soils.
Talal Darwish, Thérèse Atallah, and Ali Fadel
SOIL, 4, 225–235, https://doi.org/10.5194/soil-4-225-2018, https://doi.org/10.5194/soil-4-225-2018, 2018
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This paper is part of the GSP-ITPS effort to produce a global SOC map and update information on C stocks using old and new soil information to assess the potential for enhanced C sequestration in dry land areas of the NENA region. We used the DSMW from FAO-UNESCO (2007), focusing on organic and inorganic content in 0.3 m of topsoil and 0.7 m of subsoil, to discuss the human factors affecting the accumulation of organic C and the fate of inorganic C.
Juhwan Lee, Gina M. Garland, and Raphael A. Viscarra Rossel
SOIL, 4, 213–224, https://doi.org/10.5194/soil-4-213-2018, https://doi.org/10.5194/soil-4-213-2018, 2018
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Soil nitrogen (N) is an essential element for plant growth, but its plant-available forms are subject to loss from the environment by leaching and gaseous emissions. Still, factors controlling soil mineral N concentrations at large spatial scales are not well understood. We determined and discussed primary soil controls over the concentrations of NH4+ and NO3− at the continental scale of Australia while considering specific dominant land use patterns on a regional basis.
Eleanor Ursula Hobley, Brian Murphy, and Aaron Simmons
SOIL, 4, 169–171, https://doi.org/10.5194/soil-4-169-2018, https://doi.org/10.5194/soil-4-169-2018, 2018
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This research evaluates equations to calculate soil organic carbon (SOC) stocks. Although various equations exist for SOC stock calculations, we recommend using the simplest equation with THE lowest associated errors. Adjusting SOC stock calculations for rock content is essential. Using the mass proportion of rocks to do so minimizes error.
Cora Vos, Angélica Jaconi, Anna Jacobs, and Axel Don
SOIL, 4, 153–167, https://doi.org/10.5194/soil-4-153-2018, https://doi.org/10.5194/soil-4-153-2018, 2018
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Soil organic carbon sequestration can be facilitated by agricultural management, but its influence is not the same on all soil carbon pools. We assessed how soil organic carbon is distributed among C pools in Germany, identified factors influencing this distribution and identified regions with high vulnerability to C losses. Explanatory variables were soil texture, C / N ratio, soil C content and pH. For some regions, the drivers were linked to the land-use history as heathlands or peatlands.
Sebastian Rainer Fiedler, Jürgen Augustin, Nicole Wrage-Mönnig, Gerald Jurasinski, Bertram Gusovius, and Stephan Glatzel
SOIL, 3, 161–176, https://doi.org/10.5194/soil-3-161-2017, https://doi.org/10.5194/soil-3-161-2017, 2017
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Injection of biogas digestates (BDs) is suspected to increase losses of N2O and thus to counterbalance prevented NH3 emissions. We determined N2O and N2 losses after mixing high concentrations of BD into two soils by an incubation under an artificial helium–oxygen atmosphere. Emissions did not increase with the application rate of BD, probably due to an inhibitory effect of the high NH4+ content in BD on nitrification. However, cumulated gaseous N losses may effectively offset NH3 reductions.
Cited articles
Alberton, O., Kuyper, T. W., and Gorissen, A.: Competition for nitrogen between Pinus sylvestris and ectomycorrhizal fungi generates potential for negative feedback under elevated CO2, Plant Soil, 296, 159–172, https://doi.org/10.1007/s11104-007-9306-5, 2007.
Ambus, P., Zechmeister-Boltenstern, S., and Butterbach-Bahl, K.: Sources of nitrous oxide emitted from European forest soils, Biogeosciences, 3, 135–145, https://doi.org/10.5194/bg-3-135-2006, 2006.
Averill, C., Turner, B. L., and Finzi, A. C.: Mycorrhiza-mediated competition between plants and decomposers drives soil carbon storage, Nature, 505, 543–545, https://doi.org/10.1038/nature12901, 2014.
Baral, B. R., Kuyper, T. W., and Van Groenigen, J. W.: Liebig's law of the minimum applied to a greenhouse gas: alleviation of P-limitation reduces soil N2O emission, Plant Soil, 374, 539–548, 2014.
Bardgett, R. D. and Chan, K. F.: Experimental evidence that soil fauna enhance nutrient mineralization and plant nutrient uptake in montane grassland ecosystems, Soil Biol. Biochem., 31, 1007–1014, 1999.
Bardgett, R. D. and Wardle, D. A.: Aboveground-Belowground Linkages: Biotic Interactions, Ecosystem Processes, and Global Change, edited by: Bardgett, R. D. and Wardle, D. A., Oxford University Press, New York, USA, 320 pp., 2010.
Barraclough, D. and Puri, G.: The use of 15N pool dilution and enrichment to separate the heterotrophic and autotrophic pathways of nitrification, Soil Biol. Biochem., 27, 17–22, 1995.
Barron, A. R., Wurzburger, N., Bellenger, J. P., Wright, S. J., Kraepiel, A. M. L., and Hedin, L. O.: Molybdenum limitation of asymbiotic nitrogen fixation in tropical forest soils, Nat. Geosci., 2, 42–45, https://doi.org/10.1038/ngeo366, 2009.
Batterman, S. A., Hedin, L. O., van Breugel, M., Ransijn, J., Craven, D. J., and Hall, J. S.: Key role of symbiotic dinitrogen fixation in tropical forest secondary succession, Nature, 502, 224–227, https://doi.org/10.1038/nature12525, 2013a.
Batterman, S. A., Wurzburger, N., and Hedin, L. O.: Nitrogen and phosphorus interact to control tropical symbiotic N-2 fixation: a test in Inga punctata, J. Ecol., 101, 1400–1408, https://doi.org/10.1111/1365-2745.12138, 2013b.
Beaumont, H. J. E., van Schooten, B., Lens, S. I., Westerhoff, H. V., and van Spanning, R. J. M.: Nitrosomonas europaea expresses a nitric oxide reductase during nitrification, J. Bacteriol., 186, 4417–4421, https://doi.org/10.1128/jb.186.13.4417-4421.2004, 2004.
Bergaust, L., Bakken, L. R., and Frostegard, A.: Denitrification regulatory phenotype, a new term for the characterization of denitrifying bacteria, Biochem. Soc. T., 39, 207–212, https://doi.org/10.1042/bst0390207, 2011.
Bernal, S., Hedin, L. O., Likens, G. E., Gerber, S., and Buso, D. C.: Complex response of the forest nitrogen cycle to climate change, P. Natl. Acad. Sci. USA, 109, 3406–3411, https://doi.org/10.1073/pnas.1121448109, 2012.
Blagodatskaya, E., Littschwager, J., Lauerer, M., and Kuzyakov, Y.: Plant traits regulating N capture define microbial competition in the rhizosphere, Eur. J. Soil Biol., 61, 41–48, https://doi.org/10.1016/j.ejsobi.2014.01.002, 2014.
Blouin, M., Hodson, M. E., Delgado, E. A., Baker, G., Brussaard, L., Butt, K. R., Dai, J., Dendooven, L., Peres, G., Tondoh, J. E., Cluzeau, D., and Brun, J. J.: A review of earthworm impact on soil function and ecosystem services, Eur. J. Soil Sci., 64, 161–182, https://doi.org/10.1111/ejss.12025, 2013.
Bödeker, I. T. M., Clemmensen, K. E., de Boer, W., Martin, F., Olson, A., and Lindahl, B. D.: Ectomycorrhizal Cortinarius species participate in enzymatic oxidation of humus in northern forest ecosystems, New Phytol., 203, 245–256, https://doi.org/10.1111/nph.12791, 2014.
Bouwman, A. F., Beusen, A. H. W., Griffioen, J., Van Groenigen, J. W., Hefting, M. M., Oenema, O., Van Puijenbroek, P., Seitzinger, S., Slomp, C. P., and Stehfest, E.: Global trends and uncertainties in terrestrial denitrification and N2O emissions, Philos. T. R. Soc. B , 368, 1621, https://doi.org/10.1098/rstb.2013.0112, 2013.
Boyer, E. W., Goodale, C. L., Jaworski, N. A., and Howarth, R. W.: Anthropogenic nitrogen sources and relationships to riverine nitrogen export in the northeastern USA, Biogeochemistry, 57, 137–169, 2002.
Bradford, M. A.: Good dirt with good friends, Nature, 505, 486–487, 2014.
Brookshire, E. N. J., Hedin, L. O., Newbold, J. D., Sigman, D. M., and Jackson, J. K.: Sustained losses of bioavailable nitrogen from montane tropical forests, Nat. Geosci., 5, 123–126, https://doi.org/10.1038/ngeo1372, 2012.
Brown, G. G., Hendrix, P. F., and Beare, M. H.: Earthworms (Lumbricus rubellus) and the fate of 15N in surface-applied sorghum residues, Soil Biol. Biochem., 30, 1701–1705, 1998.
Burger, M. and Jackson, L. E.: Plant and microbial nitrogen use and turnover: Rapid conversion of nitrate to ammonium in soil with roots, Plant Soil, 266, 289–301, 2004.
Burgin, A. J. and Groffman, P. M.: Soil O2 controls denitrification rates and N2O yield in a riparian wetland, J. Geophys. Res.-Biogeosci., 117, G01010, https://doi.org/10.1029/2011jg001799, 2012.
Burns, D. A., Boyer, E. W., Elliott, E. M., and Kendall, C.: Sources and transformations of nitrate from streams draining varying land uses: Evidence from dual isotope analysis, J. Environ. Qual., 38, 1149–1159, https://doi.org/10.2134/jeq2008.0371, 2009.
Casciotti, K. L. and Ward, B. B.: Dissimilatory nitrite reductase genes from autotrophic ammonia-oxidizing bacteria, Appl. Environ. Microbiol., 67, 2213–2221, https://doi.org/10.1128/aem.67.5.2213-2221.2001, 2001.
Chapin, F. S., Zavaleta, E. S., Eviner, V. T., Naylor, R. L., Vitousek, P. M., Reynolds, H. L., Hooper, D. U., Lavorel, S., Sala, O. E., Hobbie, S. E., Mack, M. C., and Diaz, S.: Consequences of changing biodiversity, Nature, 405, 234–242, https://doi.org/10.1038/35012241, 2000.
Chen, Y., Randerson, J. T., van der Werf, G. R., Morton, D. C., Mu, M. Q., and Kasibhatla, P. S.: Nitrogen deposition in tropical forests from savanna and deforestation fires, Glob. Change Biol., 16, 2024–2038, https://doi.org/10.1111/j.1365-2486.2009.02156.x, 2010.
Cheng, W. X., Parton, W. J., Gonzalez-Meler, M. A., Phillips, R., Asao, S., McNickle, G. G., Brzostek, E., and Jastrow, J. D.: Synthesis and modeling perspectives of rhizosphere priming, New Phytol., 201, 31–44, https://doi.org/10.1111/nph.12440, 2014.
Churchland, C. and Grayston, S. J.: Specificity of plant-microbe interactions in the tree mycorrhizosphere biome and consequences for soil C cycling, Front. Microbiol., 5, 261, https://doi.org/10.3389/fmicb.2014.00261, 2014.
Cleveland, C., Houlton, B., Neill, C., Reed, S., Townsend, A., and Wang, Y.: Using indirect methods to constrain symbiotic nitrogen fixation rates: a case study from an Amazonian rain forest, Biogeochemistry, 99, 1–13, https://doi.org/10.1007/s10533-009-9392-y, 2010.
Comas, L. H., Callahan, H. S., and Midford, P. E.: Patterns in root traits of woody species hosting arbuscular and ectomycorrhizas: implications for the evolution of belowground strategies, Ecol. Evol., 4, 2979–2990, https://doi.org/10.1002/ece3.1147, 2014.
Compton, J. E., Harrison, J. A., Dennis, R. L., Greaver, T. L., Hill, B. H., Jordan, S. J., Walker, H., and Campbell, H. V.: Ecosystem services altered by human changes in the nitrogen cycle: a new perspective for US decision making, Ecol. Lett., 14, 804–815, https://doi.org/10.1111/j.1461-0248.2011.01631.x, 2011.
Cornelissen, J. H. C., Aerts, R., Cerabolini, B., Werger, M. J. A., and van der Heijden, M. G. A.: Carbon cycling traits of plant species are linked with mycorrhizal strategy, Oecologia, 129, 611–619, https://doi.org/10.1007/s004420100752, 2001.
Côrrea, A., Gurevitch, J., Martins-Loucao, M. A., and Cruz, C.: C allocation to the fungus is not a cost to the plant in ectomycorrhizae, Oikos, 121, 449–463, https://doi.org/10.1111/j.1600-0706.2011.19406.x, 2012.
Davidson, E. A., Hart, S. C., and Firestone, M. K.: Internal cycling of nitrate in soils of a mature coniferous forest, Ecology, 73, 1148–1156, 1992.
Davidson, E. A., David, M. B., Galloway, J. N., Goodale, C. L., Haeuber, R., Harrison, J. A., Howarth, R. W., Jaynes, D. B., Lowrance, R. R., Nolan, B. T., Peel, J. L., Pinder, R. W., Porter, E., Snyder, C. S., Townsend, A. R., and Ward, M. H.: Excess nitrogen in the U.S. environment: Trends, risks, and solutions, Ecology, 15, 1–16, 2012.
Decock, C. and Six, J.: How reliable is the intramolecular distribution of N-15 in N2O to source partition N2O emitted from soil?, Soil Biol. Biochem., 65, 114–127, https://doi.org/10.1016/j.soilbio.2013.05.012, 2013.
de Klein, C. A. M., Shepherd, M. A., and van der Weerden, T. J.: Nitrous oxide emissions from grazed grasslands: interactions between the N cycle and climate change – a New Zealand case study, Current Opinion in Environmental Sustainability, 9–10, 131–139, https://doi.org/10.1016/j.cosust.2014.09.016, 2014.
De-la-Pena, C. and Vivanco, J. M.: Root-Microbe Interactions: The Importance of Protein Secretion, Curr. Proteomics, 7, 265–274, https://doi.org/10.2174/157016410793611819, 2010.
DeLuca, T. H., Zackrisson, O., Nilsson, M. C., and Sellstedt, A.: Quantifying nitrogen-fixation in feather moss carpets of boreal forests, Nature, 419, 917–920, https://doi.org/10.1038/nature01051, 2002.
Dennis, P. G., Miller, A. J., and Hirsch, P. R.: Are root exudates more important than other sources of rhizodeposits in structuring rhizosphere bacterial communities?, FEMS Microbiol. Ecol., 72, 313–327, https://doi.org/10.1111/j.1574-6941.2010.00860.x, 2010.
De Ruiter, P. C., Van Veen, J. A., Moore, J. C., Brussaard, L., and Hunt, H. W.: Calculation of nitrogen mineralization in soil food webs, Plant Soil, 157, 263–273, https://doi.org/10.1007/bf00011055, 1993.
De Ruiter, P. C., Neutel, A.-M., and Moore, J. C.: Energetics, Patterns of Interaction Strengths, and Stability in Real Ecosystems, Science, 269, 1257–1260, https://doi.org/10.1126/science.269.5228.1257, 1995.
Desloover, J., Roobroeck, D., Heylen, K., Puig, S., Boeckx, P., Verstraete, W., and Boon, N.: Pathway of nitrous oxide consumption in isolated Pseudomonas stutzeri strains under anoxic and oxic conditions, Environ. Microbiol., 16, 3143–3152, https://doi.org/10.1111/1462-2920.12404, 2014.
De Vries, F. T. and Bardgett, R. D.: Plant-microbial linkages and ecosystem nitrogen retention: lessons for sustainable agriculture, Front. Ecol. Environ., 10, 425–432, https://doi.org/10.1890/110162, 2012.
Díaz, S., Fraser, L. H., Grime, J. P., and Falczuk, V.: The impact of elevated CO2 on plant-herbivore interactions: experimental evidence of moderating effects at the community level, Oecologia, 117, 177–186, https://doi.org/10.1007/s004420050646, 1998.
Dickie, I. A., Martinez-Garcia, L. B., Koele, N., Grelet, G. A., Tylianakis, J. M., Peltzer, D. A., and Richardson, S. J.: Mycorrhizas and mycorrhizal fungal communities throughout ecosystem development, Plant Soil, 367, 11–39, https://doi.org/10.1007/s11104-013-1609-0, 2013.
Dijkstra, F. A., Morgan, J. A., Blumenthal, D., and Follett, R. F.: Water limitation and plant inter-specific competition reduce rhizosphere-induced C decomposition and plant N uptake, Soil Biol. Biochem., 42, 1073–1082, https://doi.org/10.1016/j.soilbio.2010.02.026, 2010.
Dijkstra, F. A., Carrillo, Y., Pendall, E., and Morgan, J. A.: Rhizosphere priming: a nutrient perspective, Front. Microbiol., 4, 216, https://doi.org/10.3389/fmicb.2013.00216, 2013.
Dominguez, J., Bohlen, P. J., and Parmelee, R. W.: Earthworms increase nitrogen leaching to greater soil depths in row crop agroecosystems, Ecosystems, 7, 672–685, https://doi.org/10.1007/s10021-004-0150-7, 2004.
Drake, H. L. and Horn, M. A.: Earthworms as a transient heaven for terrestrial denitrifying microbes: A review, Eng. Life Sci., 6, 261–265, 2006.
Drake, H. L. and Horn, M. A.: As the Worm Turns: The Earthworm Gut as a Transient Habitat for Soil Microbial Biomes, Annu. Rev. Microbiol., 61, 169–189, 2007.
Drake, J. E., Gallet-Budynek, A., Hofmockel, K. S., Bernhardt, E. S., Billings, S. A., Jackson, R. B., Johnsen, K. S., Lichter, J., McCarthy, H. R., McCormack, M. L., Moore, D. J. P., Oren, R., Palmroth, S., Phillips, R. P., Pippen, J. S., Pritchard, S. G., Treseder, K. K., Schlesinger, W. H., DeLucia, E. H., and Finzi, A. C.: Increases in the flux of carbon belowground stimulate nitrogen uptake and sustain the long-term enhancement of forest productivity under elevated CO2, Ecol. Lett., 14, 349–357, https://doi.org/10.1111/j.1461-0248.2011.01593.x, 2011.
Duncan, J. M., Band, L. E., and Groffman, P. M.: Towards closing the watershed nitrogen budget: Spatial and temporal scaling of denitrification, J. Geophys. Res.-Biogeosci., 118, 1–15, https://doi.org/10.1002/jgrg.20090, 2013.
Elbert, W., Weber, B., Burrows, S., Steinkamp, J., Buedel, B., Andreae, M. O., and Poeschl, U.: Contribution of cryptogamic covers to the global cycles of carbon and nitrogen, Nat. Geosci., 5, 459–462, https://doi.org/10.1038/ngeo1486, 2012.
European Commission – Joint Research Centre: EDGAR 4.2: Emissions database for global atmospheric research, available at: http://edgar.jrc.ec.europa.eu/index.php (last access: 28 October 2014), 2014.
Farías, L., Faundez, J., Fernandez, C., Cornejo, M., Sanhueza, S., and Carrasco, C.: Biological N2O fixation in the eastern south pacific ocean and marine cyabobacterialk cultures, Plos One, 8, e63956, https://doi.org/10.1371/journal.pone.0063956, 2013.
Farrar, J., Hawes, M., Jones, D., and Lindow, S.: How roots control the flux of carbon to the rhizosphere, Ecology, 84, 827–837, 2003.
Finzi, A. C., Norby, R. J., Calfapietra, C., Gallet-Budynek, A., Gielen, B., Holmes, W. E., Hoosbeek, M. R., Iversen, C. M., Jackson, R. B., Kubiske, M. E., Ledford, J., Liberloo, M., Oren, R., Polle, A., Pritchard, S., Zak, D. R., Schlesinger, W. H., and Ceulemans, R.: Increases in nitrogen uptake rather than nitrogen-use efficiency support higher rates of temperate forest productivity under elevated CO2, P. Natl. Acad. Sci. USA, 104, 14014–14019, https://doi.org/10.1073/pnas.0706518104, 2007.
Frank, D. A. and Groffman, P. M.: Plant rhizospheric N processes: what we don't know and why we should care, Ecology, 90, 1512–1519, https://doi.org/10.1890/08-0789.1, 2009.
Franklin, O., Näsholm, T., Högberg, P., and Högberg, M. N.: Forests trapped in nitrogen limitation – an ecological market perspective on ectomycorrhizal symbiosis, New Phytol., 203, 657–666, https://doi.org/10.1111/nph.12840, 2014.
Fry, E. L., Power, S. A., and Manning, P.: Trait-based classification and manipulation of plant functional groups for biodiversity-ecosystem function experiments, J. Veg. Sci., 25, 248–261, https://doi.org/10.1111/jvs.12068, 2014.
Galloway, J. N., Townsend, A. R., Erisman, J. W., Bekunda, M., Cai, Z. C., Freney, J. R., Martinelli, L. A., Seitzinger, S. P., and Sutton, M. A.: Transformation of the nitrogen cycle: Recent trends, questions, and potential solutions, Science, 320, 889–892, https://doi.org/10.1126/science.1136674, 2008.
Galloway, J. N., Leach, A. M., Bleeker, A., and Erisman, J. W.: A chronology of human understanding of the nitrogen cycle, Philos. T. R. Soc. B, 368, 11, https://doi.org/10.1098/rstb.2013.0120, 2013.
Garbeva, P., Baggs, E. M., and Prosser, J. I.: Phylogeny of nitrite reductase (nirK) and nitric oxide reductase (norB) genes from Nitrosospira species isolated from soil, FEMS Microbiol. Lett., 266, 83–89, https://doi.org/10.1111/j.1574-6968.2006.00517.x, 2007.
Garcia-Palacios, P., Maestre, F. T., and Milla, R.: Community-aggregated plant traits interact with soil nutrient heterogeneity to determine ecosystem functioning, Plant Soil, 364, 119–129, https://doi.org/10.1007/s11104-012-1349-6, 2013.
Gill, R. A. and Jackson, R. B.: Global patterns of root turnover for terrestrial ecosystems, New Phytol., 147, 13–31, 2000.
Gorham, E.: Biogeochemistry – its origins and development, Biogeochemistry, 13, 199–239, 1991.
Granli, T. and Bøckman, O. C.: Nitrous oxide from agriculture, Norw. J. Agric. Sci., Supplement No. 12, 1–128, 1994.
Grigulis, K., Lavorel, S., Krainer, U., Legay, N., Baxendale, C., Dumont, M., Kastl, E., Arnoldi, C., Bardgett, R. D., Poly, F., Pommier, T., Schloter, M., Tappeiner, U., Bahn, M., and Clément, J.-C.: Relative contributions of plant traits and soil microbial properties to mountain grassland ecosystem services, J. Ecol., 101, 47–57, https://doi.org/10.1111/1365-2745.12014, 2013.
Grime, J. P.: Benefits of plant diversity to ecosystems: immediate, filter and founder effects, J. Ecol., 86, 902–906, 1998.
Grman, E. and Robinson, T. M. P.: Resource availability and imbalance affect plant-mycorrhizal interactions: a field test of three hypotheses, Ecology, 94, 62–71, 2013.
Groffman, P.: Terrestrial denitrification: challenges and opportunities, Ecol. Proc., 1, 20130112, https://doi.org/10.1186/2192-1709-1-11, 2012.
Groffman, P., Butterbach-Bahl, K., Fulweiler, R., Gold, A., Morse, J., Stander, E., Tague, C., Tonitto, C., and Vidon, P.: Challenges to incorporating spatially and temporally explicit phenomena (hotspots and hot moments) in denitrification models, Biogeochemistry, 92, 49–77, 2009.
Groffman, P. M.: Nitrogen balances at ecosystem, landscape, regional and global scales, in: Nitrogen in Agricultural Soils, edited by: Schepers, J. and Raun, W., Soil Science Society of America, Madison, 731–758, 2008.
Groffman, P. M., Altabet, M. A., Bohlke, J. K., Butterbach-Bahl, K., David, M. B., Firestone, M. K., Giblin, A. E., Kana, T. M., Nielsen, L. P., and Voytek, M. A.: Methods for measuring denitrification: Diverse approaches to a difficult problem, Ecol. Appl., 16, 2091–2122, 2006.
Gundale, M. J., Wardle, D. A., and Nilsson, M. C.: The effect of altered macroclimate on N-fixation by boreal feather mosses, Biol. Lett., 8, 805–808, https://doi.org/10.1098/rsbl.2012.0429, 2012.
Hedin, L. O., Brookshire, E. N. J., Menge, D. N. L., and Barron, A. R.: The nitrogen paradox in tropical forest ecosystems, Ann. Rev. Ecol. Evol. S., 40, 613–635, https://doi.org/10.1146/annurev.ecolsys.37.091305.110246, 2009.
Heemsbergen, D. A., Berg, M. P., Loreau, M., van Hal, J. R., Faber, J. H., and Verhoef, H. A.: Biodiversity effects on soil processes explained by interspecific functional dissimilarity, Science, 306, 1019–1020, https://doi.org/10.1126/science.1101865, 2004.
Hobbie, E. A. and Högberg, P.: Nitrogen isotopes link mycorrhizal fungi and plants to nitrogen dynamics, New Phytol., 196, 367–382, https://doi.org/10.1111/j.1469-8137.2012.04300.x, 2012.
Hobbie, E. A., Ouimette, A. P., Schuur, E. A. G., Kierstead, D., Trappe, J. M., Bendiksen, K., and Ohenoja, E.: Radiocarbon evidence for the mining of organic nitrogen from soil by mycorrhizal fungi, Biogeochemistry, 114, 381–389, https://doi.org/10.1007/s10533-012-9779-z, 2013.
Hodge, A. and Fitter, A. H.: Substantial nitrogen acquisition by arbuscular mycorrhizal fungi from organic material has implications for N cycling, P. Natl. Acad. Sci. USA, 107, 13754–13759, https://doi.org/10.1073/pnas.1005874107, 2010.
Hodge, A. and Storer, K.: Arbuscular mycorrhiza and nitrogen: implications for individual plants through to ecosystems, Plant Soil, 386, 1–19, https://doi.org/10.1007/s11104-014-2162-1, 2015.
Hooper, A. B.: A nitrite-reducing enzyme from Nitosomonas Europaea – preliminary characterization with hydroxylamine as electron donor, Biochim. Biophys. Acta, 162, 49–65, https://doi.org/10.1016/0005-2728(68)90213-2, 1968.
Houlton, B. Z., Sigman, D. M., and Hedin, L. O.: Isotopic evidence for large gaseous nitrogen losses from tropical rainforests, P. Natl. Acad. Sci. USA, 103, 8745–8750, https://doi.org/10.1073/pnas.0510185103, 2006.
Howarth, R. W., Billen, G., Swaney, D., Townsend, A., Jaworski, N., Lajtha, K., Downing, J. A., Elmgren, R., Caraco, N., Jordan, T., Berendse, F., Freney, J., Kudeyarov, V., Murdoch, P., and Zhu, Z. L.: Regional nitrogen budgets and riverine N&P fluxes for the drainages to the North Atlantic Ocean: Natural and human influences, Biogeochemistry, 35, 75–139, 1996.
Huygens, D., Trimmer, M., Rütting, T., Müller, C., Heppell, C. M., Lansdown, K., and Boeckx, P.: Biogeochemical Nitrogen Cycling in Wetland Ecosystems: Nitrogen-15 Isotope Techniques, in: Methods in Biogeochemistry of Wetlands, edited by: DeLaune, R. D., Reddy, K. R., Richardson, C. J., and Megonigal, J. P., Soil Science Society of America, Inc., Madison, Wisconsin, 553–591, 2013.
Ishii, S., Ohno, H., Tsuboi, M., Otsuka, S., and Senoo, K.: Identification and isolation of active N2O reducers in rice paddy soil, ISME J., 5, 1936–1945, https://doi.org/10.1038/ismej.2011.69, 2011.
Isobe, K. and Ohte, N.: Ecological perspectives on microbes involved in N-cycling, Microbiol. Environ., 29, 4–16, https://doi.org/10.1264/jsme2.ME13159, 2014.
Isobe, K., Koba, K., Suwa, Y., Ikutani, J., Kuroiwa, M., Fang, Y., Yoh, M., Mo, J., Otsuka, S., and Senoo, K.: Nitrite transformations in an N-saturated forest soil, Soil Biol. Biochem., 52, 61–63, 2012.
Itakura, M., Uchida, Y., Akiyama, H., Hoshino, Y. T., Shimomura, Y., Morimoto, S., Tago, K., Wang, Y., Hayakawa, C., Uetake, Y., Sanchez, C., Eda, S., Hayatsu, M., and Minamisawa, K.: Mitigation of nitrous oxide emissions from soils by Bradyrhizobium japonicum inoculation, Nat. Clim. Change, 3, 208–212, https://doi.org/10.1038/nclimate1734, 2013.
Jaeger, C. H., Lindow, S. E., Miller, S., Clark, E., and Firestone, M. K.: Mapping of sugar and amino acid availability in soil around roots with bacterial sensors of sucrose and Tryptophan, Appl. Environ. Microbiol., 65, 2685–2690, 1999.
Ji, R. and Brune, A.: Nitrogen mineralization, ammonia accumulation, and emission of gaseous NH3 by soil-feeding termites, Biogeochemistry, 78, 267–283, 2006.
Jones, C. M., Spor, A., Brennan, F. P., Breuil, M. C., Bru, D., Lemanceau, P., Griffiths, B., Hallin, S., and Philippot, L.: Recently indentified microbial guild mediates soil N2O sink capacity, Nat. Clim. Change, 4, 801–805, 2014.
Kaiser, C., Koranda, M., Kitzler, B., Fuchslueger, L., Schnecker, J., Schweiger, P., Rasche, F., Zechmeister-Boltenstern, S., Sessitsch, A., and Richter, A.: Belowground carbon allocation by trees drives seasonal patterns of extracellular enzyme activities by altering microbial community composition in a beech forest soil, New Phytol., 187, 843–858, https://doi.org/10.1111/j.1469-8137.2010.03321.x, 2010.
Kaushal, S. S., Groffman, P. M., Band, L. E., Elliott, E. M., Shields, C. A., and Kendall, C.: Tracking nonpoint source nitrogen pollution in human-impacted watersheds, Environ. Sci. Technol., 45, 8225–8232, https://doi.org/10.1021/es200779e, 2011.
Kellman, L. and Hillaire-Marcel, C.: Nitrate cycling in streams: using natural abundances of NO3--d15N to measure in-situ denitrification, Biogeochemistry, 43, 273–292, 1998.
Keymer, D. P. and Kent, A. D.: Contribution of nitrogen fixation to first year Miscanthus x giganteus, Global Change Biology Bioenergy, 6, 577–586, https://doi.org/10.1111/gcbb.12095, 2014.
Kirkham, D. and Bartholomew, W. V.: Equations for following nutrient transformations in soil, utilizing tracer data, Soil Sci. Soc. Am. Proc., 18, 33–34, 1954.
Kirkham, D. and Bartholomew, W. V.: Equations for following nutrient transformations in soil, utilizing tracer data: II, Soil Sci. Soc. Am. Proc., 19, 189–192, 1955.
Koele, N., Dickie, I. A., Oleksyn, J., Richardson, S. J., and Reich, P. B.: No globally consistent effect of ectomycorrhizal status on foliar traits, New Phytol., 196, 845–852, https://doi.org/10.1111/j.1469-8137.2012.04297.x, 2012.
Koide, R. T., Sharda, J. N., Herr, J. R., and Malcolm, G. M.: Ectomycorrhizal fungi and the biotrophy-saprotrophy continuum, New Phytol., 178, 230–233, https://doi.org/10.1111/j.1469-8137.2008.02401.x, 2008.
Kool, D. M., Wrage, N., Oenema, O., Dolfing, J., and Van Groenigen, J. W.: Oxygen exchange between (de)nitrification intermediates and H2O and its implications for source determination of N2O and NO3-: a review, Rapid Commun. Mass Sp., 21, 3569–3578, 2007.
Kool, D. M., Müller, C., Wrage, N., Oenema, O., and Van Groenigen, J. W.: Oxygen exchange between nitrogen oxides and H2O can occur during nitrifier pathways, Soil Biol. Biochem., 41, 1632–1641, https://doi.org/10.1016/j.soilbio.2009.05.002, 2009.
Kool, D. M., Wrage, N., Zechmeister-Boltenstern, S., Pfeffer, M., Brus, D. J., Oenema, O., and Van Groenigen, J. W.: Nitrifier denitrification can be a source of N2O from soil: a revised approach to the dual isotope labelling method, Eur. J. Soil Sci., 61, 759–772, 2010.
Kool, D. M., Dolfing, J., Wrage, N., and Van Groenigen, J. W.: Nitrifier denitrification as a distinct and significant source of nitrous oxide from soil, Soil Biol. Biochem., 43, 174–178, https://doi.org/10.1016/j.soilbio.2010.09.030, 2011a.
Kool, D. M., Van Groenigen, J. W., and Wrage, N.: Source determination of nitrous oxide based on nitrogen and oxygen isotope tracing: dealing with oxygen exchange, Methods Enzymol., 496, 139–160, 2011b.
Koster, J. R., Well, R., Dittert, K., Giesemann, A., Lewicka-Szczebak, D., Muhling, K. H., Herrmann, A., Lammel, J., and Senbayram, M.: Soil denitrification potential and its influence on N2O reduction and N2O isotopomer ratios, Rapid Commun. Mass Sp., 27, 2363–2373, https://doi.org/10.1002/rcm.6699, 2013.
Kraft, B., Strous, M., and Tegetmeyer, H. E.: Microbial nitrate respiration – Genes, enzymes and environmental distribution, J. Biotechnol., 155, 104–117, https://doi.org/10.1016/j.jbiotec.2010.12.025, 2011.
Kuiper, I., de Deyn, G. B., Thakur, M. P., and van Groenigen, J. W.: Soil invertebrate fauna affect N2O emissions from soil, Glob. Change Biol., 19, 2814–2825, https://doi.org/10.1111/gcb.12232, 2013.
Kulkarni, M. V., Burgin, A. J., Groffman, P. M., and Yavitt, J. B.: A comparison of denitrification rates as measured using direct flux and 15N tracer methods in northeastern forest soils, Biogeochemistry, 117, 359–373, 2014.
Kuyper, T. W.: Ectomycorrhiza and the open nitrogen cycle in an afrotropical rainforest, New Phytol., 195, 728–729, https://doi.org/10.1111/j.1469-8137.2012.04246.x, 2012.
Kuyper, T. W. and Kiers, E. T.: The danger of mycorrhizal traps?, New Phytol., 203, 352–354, https://doi.org/10.1111/nph.12883, 2014.
Kuzyakov, Y. and Cheng, W.: Photosynthesis controls of rhizosphere respiration and organic matter decomposition, Soil Biol. Biochem., 33, 1915–1925, https://doi.org/10.1016/s0038-0717(01)00117-1, 2001.
Larmola, T., Leppanen, S. M., Tuittila, E. S., Aarva, M., Merila, P., Fritze, H., and Tiirola, M.: Methanotrophy induces nitrogen fixation during peatland development, P. Natl. Acad. Sci. USA, 111, 734–739, https://doi.org/10.1073/pnas.1314284111, 2014.
Lee, S. Y. and Foster, R. C.: Soil Fauna and Soil Structure, Aust. J. Soil Res., 29, 745–775, 1991.
Lewicka-Szczebak, D., Well, R., Koster, J. R., Fuss, R., Senbayram, M., Dittert, K., and Flessa, H.: Experimental determinations of isotopic fractionation factors associated with N2O production and reduction during denitrification in soils, Geochim. Cosmochim. Ac., 134, 55–73, https://doi.org/10.1016/j.gca.2014.03.010, 2014.
Liiri, M., Ilmarinen, K., and Setälä, H.: Variable impacts of enchytraeid worms and ectomycorrhizal fungi on plant growth in raw humus soil treated with wood ash, Appl. Soil Ecol., 35, 174–183, 2007.
Lindahl, B. D., Ihrmark, K., Boberg, J., Trumbore, S. E., Hogberg, P., Stenlid, J., and Finlay, R. D.: Spatial separation of litter decomposition and mycorrhizal nitrogen uptake in a boreal forest, New Phytol., 173, 611–620, https://doi.org/10.1111/j.1469-8137.2006.01936.x, 2007.
Loreau, M.: Ecosystem development explained by competition within and between material cycles, P. R. Soc. B, 265, 33–38, https://doi.org/10.1098/rspb.1998.0260, 1998.
Lowrance, R., Altier, L. S., Newbold, J. D., Schnabel, R. R., Groffman, P. M., Denver, J. M., Correll, D. L., Gilliam, J. W., Robinson, J. L., Brinsfield, R. B., Staver, K. W., Lucas, W., and Todd, A. H.: Water quality functions of riparian forest buffers in Chesapeake Bay watersheds, Environ. Manage., 21, 687–712, 1997.
Lubbers, I. M., van Groenigen, K. J., Fonte, S. J., Six, J., Brussaard, L., and van Groenigen, J. W.: Greenhouse-gas emissions from soils increased by earthworms, Nat. Clim. Change, 3, 187–194, 2013.
Luo, Y., Su, B., Currie, W. S., Dukes, J. S., Finzi, A. C., Hartwig, U., Hungate, B., McMurtrie, R. E., Oren, R., Parton, W. J., Pataki, D. E., Shaw, M. R., Zak, D. R., and Field, C. B.: Progressive nitrogen limitation of ecosystem responses to rising atmospheric carbon dioxide, Bioscience, 54, 731–739, https://doi.org/10.1641/0006-3568(2004)054[0731:pnloer]2.0.co;2, 2004.
Luo, Y., Melillo, J., Niu, S., Beier, C., Clark, J. S., Classen, A. T., Davidson, E., Dukes, J. S., Evans, R. D., Field, C. B., Czimczik, C. I., Keller, M., Kimball, B. A., Kueppers, L. M., Norby, R. J., Pelini, S. L., Pendall, E., Rastetter, E., Six, J., Smith, M., Tjoelker, M. G., and Torn, M. S.: Coordinated approaches to quantify long-term ecosystem dynamics in response to global change, Global Change Biol., 17, 843–854, https://doi.org/10.1111/j.1365-2486.2010.02265.x, 2011.
Majumdar, D.: Biogeochemistry of N2O Uptake and Consumption in Submerged Soils and Rice Fields and Implications in Climate Change, Crit. Rev. Env. Sci. Tec., 43, 2653–2684, https://doi.org/10.1080/10643389.2012.694332, 2013.
Mania, D., Heylen, K., Van Spanning, R. J., and Frostegard, Å.: The nitrate-ammonifying and nosZ carrying bacterium Bacillus vireti is a potent source and sink for nitric and nitrous oxide under high nitrate conditions, Environ. Microbiol., 16, 3196–3210, https://doi.org/10.1111/1462-2920.12478, 2014.
Matson, P. A., McDowell, W. H., Townsend, A. R., and Vitousek, P. M.: The globalization of N deposition: ecosystem consequences in tropical environments, Biogeochemistry, 46, 67–83, https://doi.org/10.1023/a:1006152112852, 1999.
Mayer, P. M., Reynolds, S. K., McCutchen, M. D., and Canfield, T. J.: Meta-analysis of nitrogen removal in riparian buffers, J. Environ. Qual., 36, 1172–1180, https://doi.org/10.2134/jeq2006.0462, 2007.
Midgley, M. G. and Phillips, R. P.: Mycorrhizal associations of dominant trees influence nitrate leaching responses to N deposition, Biogeochemistry, 117, 241–253, https://doi.org/10.1007/s10533-013-9931-4, 2014.
Mikola, J. and Setälä, H.: No evidence of trophic cascades in an experimental microbial-based soil food web, Ecology, 79, 153–164, https://doi.org/10.2307/176871, 1998.
Moorshammer, M., Wanek, W., Hämmerle, I., Fuchslueger, L., Hofmhansl, F., Knoltsch, A., Schnecker, J., Takriti, M., Watzka, M., Wild, B., Keiblinger, K. M., Zechmeister-Boltenstern, S., and Richter, A.: Adjustment of microbial nitrogen use efficiency to carbon:nitrogen imbalance regulates soil nitrogen cycling, Nat. Commun., 5, 3694, https://doi.org/10.1038/ncomms4694, 2014.
Morse, J. L., Werner, S. F., Gillen, C., Bailey, S. W., McGuire, K. J., and Groffman, P. M.: Searching for biogeochemical hotspots in three dimensions: Soil C and N cycling in hydropedologic units in a northern hardwood forest, J. Geophys. Res.-Biogeosci., 119, 1596–1607, https://doi.org/10.1002/2013JG002589, 2014.
Morse, J. L., Durán, J., Beall, F., Enanga, E., Creed, I. F., Fernandez, I. J., and Groffman, P. M.: Soil denitrification fluxes from three northeastern North American forests ranging in nitrogen availability, Oecologia, 177, 17–27, https://doi.org/10.1007/s00442-014-3117-1, 2015.
Mosier, A. R., Duxbury, J. M., Freney, J. R., Heinemeyer, O., and Minami, K.: Assessing and mitigating N2O emissions from agricultural soils, Clim. Change, 40, 7–38, https://doi.org/10.1023/a:1005386614431, 1998.
Mulder, A., Vandegraaf, A. A., Robertson, L. A., and Kuenen, J. G.: Anaerobic ammonium oxidation discovered in a denitrifying fluidized bed reactor, FEMS Microbiol. Ecol., 16, 177–183, https://doi.org/10.1111/j.1574-6941.1995.tb00281.x, 1995.
Müller, C., Laughlin, R. J., Spott, O., and Rütting, T.: Quantification of N2O emission pathways via a 15N tracing model, Soil Biol. Biochem., 72, 44–54, 2014.
Myrold, D. D. and Tiedje, J. M.: Simultaneous estimation of several nitrogen cycle rates using 15N: theory and application, Soil Biol. Biochem., 18, 559–568, 1986.
Näsholm, T., Högberg, P., Franklin, O., Metcalfe, D., Keel, S. G., Campbell, C., Hurry, V., Linder, S., and Högberg, M. N.: Are ectomycorrhizal fungi alleviating or aggravating nitrogen limitation of tree growth in boreal forests?, New Phytol., 198, 214–221, https://doi.org/10.1111/nph.12139, 2013.
Nebert, L. D., Bloem, J., Lubbers, I. M., and Van Groenigen, J. W.: Association of earthworm – denitrifier interactions with increased emissions of nitrous oxide from soil mesocosms amended with crop residue, Appl. Environ. Microbiol., 77, 4097–4104, 2011.
Nguyen, C.: Rhizodeposition of organic C by plants: mechanisms and controls, Agronomie, 23, 375–396, https://doi.org/10.1051/agro:2003011, 2003.
Orellana, L. H., Rodriguez-R, L. M., Higgins, S., Chee-Sanford, J. C., Sanford, R. A., Ritalahti, K. M., Loffler, F. E., and Konstantinidis, K. T.: Detecting nitrous oxide reductase (nosZ) genes in soil metagenomes: methods development and implications for the nitrogen cycle, Mbio, 5, https://doi.org/10.1128/mBio.01193-14, 2014.
Orwin, K. H., Buckland, S. M., Johnson, D., Turner, B. L., Smart, S., Oakley, S., and Bardgett, R. D.: Linkages of plant traits to soil properties and the functioning of temperate grassland, J. Ecol., 98, 1074–1083, https://doi.org/10.1111/j.1365-2745.2010.01679.x, 2010.
Ostrom, N. E. and Ostrom, P. H.: The isotopomers of nitrous oxide: analytical considerations and application to resolution of microbial production pathways, in: Handbook of environmental isotope geochemistry, edited by: Baskaran, M., Springer-Verlag, Berlin, 453–476, 2011.
Parkin, T. B. and Berry, E. C.: Microbial nitrogen transformations in earthworm burrows, Soil Biol. Biochem., 31, 1765–1771, 1999.
Paterson, E.: Importance of rhizodeposition in the coupling of plant and microbial productivity, Eur. J. Soil Sci., 54, 741–750, 2003.
Pausch, J., Tian, J., Riederer, M., and Kuzyakov, Y.: Estimation of rhizodeposition at field scale: upscaling of a C-14 labeling study, Plant Soil, 364, 273–285, https://doi.org/10.1007/s11104-012-1363-8, 2013a.
Pausch, J., Zhu, B., Kuzyakov, Y., and Cheng, W.: Plant inter-species effects on rhizosphere priming of soil organic matter decomposition, Soil Biol. Biochem., 57, 91–99, https://doi.org/10.1016/j.soilbio.2012.08.029, 2013b.
Philippot, L., Hallin, S., Borjesson, G., and Baggs, E. M.: Biochemical cycling in the rhizosphere having an impact on global change, Plant Soil, 321, 61–81, https://doi.org/10.1007/s11104-008-9796-9, 2009.
Phillips, R. P., Finzi, A. C., and Bernhardt, E. S.: Enhanced root exudation induces microbial feedbacks to N cycling in a pine forest under long-term CO2 fumigation, Ecol. Lett., 14, 187–194, https://doi.org/10.1111/j.1461-0248.2010.01570.x, 2011.
Phillips, R. P., Meier, I. C., Bernhardt, E. S., Grandy, A. S., Wickings, K., and Finzi, A. C.: Roots and fungi accelerate carbon and nitrogen cycling in forests exposed to elevated CO2, Ecol. Lett., 15, 1042–1049, https://doi.org/10.1111/j.1461-0248.2012.01827.x, 2012.
Phillips, R. P., Brzostek, E., and Midgley, M. G.: The mycorrhizal-associated nutrient economy: a new framework for predicting carbon-nutrient couplings in temperate forests, New Phytol., 199, 41–51, https://doi.org/10.1111/nph.12221, 2013.
Pomowski, A., Zumft, W. G., Kroneck, P. M. H., and Einsle, O.: N2O binding at a 4Cu:2S copper-sulphur cluster in nitrous oxide reductase, Nature, 477, 234–237, https://doi.org/10.1038/nature10332, 2011.
Postma-Blaauw, M. B., Bloem, J., Faber, J. H., Van Groenigen, J. W., De Goede, R. G. M., and Brussaard, L.: Earthworm species composition affects the soil bacterial community and net nitrogen mineralization, Pedobiologia, 50, 243–256, 2006.
Poth, M. and Focht, D. D.: N-15 kinetic – analysis of N2O production by Nitrosomonas Europaea – an examination of nitrifier denitrification, Appl. Environ. Microbiol., 49, 1134–1141, 1985.
Rantalainen, M.-L., Fritze, H., Haimi, J., Kiikkilä, O., Pennanen, T., and Setälä, H.: Do enchytraeid worms and habitat corridors facilitate the colonisation of habitat patches by soil microbes?, Biol. Fertility Soils, 39, 200–208, https://doi.org/10.1007/s00374-003-0687-1, 2004.
Read, D. J.: Mycorrhizas in ecosystems, Experientia, 47, 376–391, https://doi.org/10.1007/bf01972080, 1991.
Read, D. J. and Perez-Moreno, J.: Mycorrhizas and nutrient cycling in ecosystems – a journey towards relevance?, New Phytol., 157, 475–492, https://doi.org/10.1046/j.1469-8137.2003.00704.x, 2003.
Reed, S. C., Cleveland, C. C., and Townsend, A. R.: Functional ecology of free-living nitrogen fixation: A contemporary perspective, Annu. Rev. Ecol. Evol. S., 42, 489–512, https://doi.org/10.1146/annurev-ecolsys-102710-145034, 2011.
Reich, P. B.: The world-wide "fast-slow" plant economics spectrum: a traits manifesto, J. Ecol., 102, 275–301, 2014.
Rineau, F., Shah, F., Smits, M. M., Persson, P., Johansson, T., Carleer, R., Troein, C., and Tunlid, A.: Carbon availability triggers the decomposition of plant litter and assimilation of nitrogen by an ectomycorrhizal fungus, ISME J., 7, 2010–2022, https://doi.org/10.1038/ismej.2013.91, 2013.
Ritchie, G. A. F. and Nicholas, D. J.: Identification of sources of nitrous-oxide produced by oxidate and reductive processes in Nitrosomonas Europaea, Biochem. J., 126, 1181–1191, 1972.
Rizhiya, E., Bertora, C., Van Vliet, P. C. J., Kuikman, P. J., Faber, J. H., and Van Groenigen, J. W.: Earthworm activity as a determinant for N2O emission from crop residue, Soil Biol. Biochem., 39, 2058–2069, 2007.
Rütting, T. and Müller, C.: Process-specific analysis of nitrite dynamics in a permanent grassland soil by using a Monte Carlo sampling technique, Eur. J. Soil Sci., 59, 208–215, 2008.
Rütting, T., Huygens, D., Müller, C., Van Cleemput, O., Godoy, R., and Boeckx, P.: Functional role of DNRA and nitrite reduction in a pristine south Chilean Nothofagus forest, Biogeochemistry, 90, 243–258, 2008.
Rütting, T., Boeckx, P., Müller, C., and Klemedtsson, L.: Assessment of the importance of dissimilatory nitrate reduction to ammonium for the terrestrial nitrogen cycle, Biogeosciences, 8, 1779–1791, https://doi.org/10.5194/bg-8-1779-2011, 2011a.
Rütting, T., Huygens, D., Staelens, J., Müller, C., and Boeckx, P.: Advances in 15N tracing experiments: new labelling and data analysis approaches, Biochem. Soc. T., 39, 279–283, 2011b.
Sanford, R. A., Wagner, D. D., Wu, Q. Z., Chee-Sanford, J. C., Thomas, S. H., Cruz-Garcia, C., Rodriguez, G., Massol-Deya, A., Krishnani, K. K., Ritalahti, K. M., Nissen, S., Konstantinidis, K. T., and Loffler, F. E.: Unexpected nondenitrifier nitrous oxide reductase gene diversity and abundance in soils, P. Natl. Acad. Sci. USA, 109, 19709–19714, https://doi.org/10.1073/pnas.1211238109, 2012.
Sawayama, S.: Possibility of anoxic ferric ammonium oxidation, J. Biosci. Bioeng., 101, 70–72, 2006.
Schimel, J.: Assumptions and errors in the 15NH4+ pool dilution technique for measuring mineralization and immobilization, Soil Biol. Biochem., 28, 827–828, 1996.
Schimel, J. P. and Bennett, J.: Nitrogen mineralization: challenges of a changing paradigm, Ecology, 85, 591–602, 2004.
Schlesinger, W. H.: An estimate of the global sink for nitrous oxide in soils, Glob. Change Biol., 19, 2929–2931, https://doi.org/10.1111/gcb.12239, 2013.
Schmidt, I., van Spanning, R. J. M., and Jetten, M. S. M.: Denitrification and ammonia oxidation by Nitrosomonas europaea wild-type, and NirK- and NorB-deficient mutants, Microbiology-Sgm, 150, 4107–4114, https://doi.org/10.1099/mic.0.27382-0, 2004.
Seitzinger, S., Harrison, J. A., Bohlke, J. K., Bouwman, A. F., Lowrance, R., Peterson, B., Tobias, C., and Van Drecht, G.: Denitrification across landscapes and waterscapes: A synthesis, Ecol. Appl., 16, 2064–2090, 2006.
Shaw, L. J., Nicol, G. W., Smith, Z., Fear, J., Prosser, J. I., and Baggs, E. M.: Nitrosospira spp. can produce nitrous oxide via a nitrifier denitrification pathway, Environ. Microbiol., 8, 214–222, https://doi.org/10.1111/j.1462-2920.2005.00882.x, 2006.
Shipitalo, M. J. and Le Bayon, R. C.: Quantifying the Effects of Earthworms on Soil Aggregation and Porosity, in: Earthworm Ecology, edited by: Edwards, C. A., CRC Press LLC, Boca Raton, FL, 183–200, 2004.
Simon, J.: Enzymology and bioenergetics of respiratory nitrite ammonification, FEMS Microbiol. Rev., 26, 285–309, https://doi.org/10.1111/j.1574-6976.2002.tb00616.x, 2002.
Simon, J. and Klotz, M. G.: Diversity and evolution of bioenergetic systems involved in microbial nitrogen compound transformations, BBA-Bioenergetics, 1827, 114–135, https://doi.org/10.1016/j.bbabio.2012.07.005, 2013.
Simon, J., Einsle, O., Kroneck, P. M. H., and Zumft, W. G.: The unprecedented nos gene cluster of Wolinella succinogenes encodes a novel respiratory electron transfer pathway to cytochrome c nitrous oxide reductase, FEBS Lett., 569, 7–12, https://doi.org/10.1016/j.febslet.2004.05.060, 2004.
Spott, O., Russow, R., and Stange, C. F.: Formation of hybrid N2O and hybrid N2 due to codenitrification: First review of a barely considered process of microbially mediated N-nitrosation, Soil Biol. Biochem., 43, 1995–2011, https://doi.org/10.1016/j.soilbio.2011.06.014, 2011.
Stange, C. F., Spott, O., and Müller, C.: An inverse abundance approach to separate soil nitrogen pools and gaseous nitrogen fluxes into fractions related to ammonium, nitrate and soil organic nitrogen, Eur. J. Soil Sci., 60, 907–915, 2009.
Stange, C. F., Spott, O., and Russow, R.: Analysis of the coexisting pathways for NO and N2O formation in Chernozem using the 15N-tracer SimKIM-Advanced model, Isotop. Environm. Health Stud., 49, 503–519, 2013.
Stevens, R. J., Laughlin, R. J., Burns, L. C., Arah, J. R. M., and Hood, R. C.: Measuring the contributions of nitrification and denitrification to the flux of nitrous oxide from soil, Soil Biol. Biochem., 29, 139–151, 1997.
Stocker, T. E., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley, P. M.: Climate Change 2013: The physical science basis. Contribution of working group I to the fifth assessment report of the Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge, UK, 2013.
Sullivan, B. W., Smith, W. K., Townsend, A. R., Nasto, M. K., Reed, S. C., Chazdon, R. L., and Cleveland, C. C.: Spatially robust estimates of biological nitrogen (N) fixation imply substantial human alteration of the tropical N cycle, P. Natl. Acad. Sci. USA, 111, 8101–8106, https://doi.org/10.1073/pnas.1320646111, 2014.
Sutka, R. L., Ostrom, N. E., Ostrom, P. H., Breznak, J. A., Gandhi, H., Pitt, A. J., and Li, F.: Distinguishing nitrous oxide production from nitrification and denitrification on the basis of isotopomer abundances, Appl. Environ. Microbiol., 72, 638–644, https://doi.org/10.1128/aem.72.1.638-644.2006, 2006.
Swerts, M., Uytterhoeven, G., Merckx, R., and Vlassak, K.: Semicontinuous measurement of soil atmosphere gases with gas-flow soil core method, Soil Sci. Soc. Am. J., 59, 1336–1342, 1995.
Talbot, J. M. and Treseder, K. K.: Controls over mycorrhizal uptake of organic nitrogen, Pedobiologia, 53, 169–179, https://doi.org/10.1016/j.pedobi.2009.12.001, 2010.
Talbot, J. M., Allison, S. D., and Treseder, K. K.: Decomposers in disguise: mycorrhizal fungi as regulators of soil C dynamics in ecosystems under global change, Funct. Ecol., 22, 955–963, https://doi.org/10.1111/j.1365-2435.2008.01402.x, 2008.
Taylor, A. E., Vajrala, N., Giguere, A. T., Gitelman, A. I., Arp, D. J., Myrold, D. D., Sayavedra-Soto, L., and Bottomley, P. J.: Use of Aliphatic n-Alkynes To Discriminate Soil Nitrification Activities of Ammonia-Oxidizing Thaumarchaea and Bacteria, Appl. Environ. Microbiol., 79, 6544–6551, https://doi.org/10.1128/aem.01928-13, 2013.
Tedersoo, L., Naadel, T., Bahram, M., Pritsch, K., Buegger, F., Leal, M., Koljalg, U., and Poldmaa, K.: Enzymatic activities and stable isotope patterns of ectomycorrhizal fungi in relation to phylogeny and exploration types in an afrotropical rain forest, New Phytol., 195, 832–843, https://doi.org/10.1111/j.1469-8137.2012.04217.x, 2012.
Thakur, M. P., van Groenigen, J. W., Kuiper, I., and De Deyn, G. B.: Interactions between microbial-feeding and predatory soil fauna trigger N2O emissions, Soil Biol. Biochem., 70, 256–262, https://doi.org/10.1016/j.soilbio.2013.12.020, 2014.
Thomas, R. Q., Canham, C. D., Weathers, K. C., and Goodale, C. L.: Increased tree carbon storage in response to nitrogen deposition in the US, Nat. Geosci., 3, 13–17, https://doi.org/10.1038/ngeo721, 2010.
Tiedje, J. M.: Ecology of denitrification and dissimilatory nitrate reduction to ammonium, in: Biology of anaerobic microorganisms, edited by: Zehnder, A. J. B., Wiley, New York, 179–244, 1988.
Tilsner, J., Wrage, N., Lauf, J., and Gebauer, G.: Emission of gaseous nitrogen oxides from an extensively managed grassland in NE Bavaria, Germany – II. Stable isotope natural abundance of N2O, Biogeochemistry, 63, 249–267, https://doi.org/10.1023/a:1023316315550, 2003.
Topoliantz, S., Ponge, J.-F., and Viaux, P.: Earthworm and enchytraeid activity under different arable farming systems, as exemplified by biogenic structures, Plant Soil, 225, 39–51, https://doi.org/10.1023/a:1026537632468, 2000.
Van Breemen, N., Boyer, E. W., Goodale, C. L., Jaworski, N. A., Paustian, K., Seitzinger, S. P., Lajtha, K., Mayer, B., Van Dam, D., Howarth, R. W., Nadelhoffer, K. J., Eve, M., and Billen, G.: Where did all the nitrogen go? Fate of nitrogen inputs to large watersheds in the northeastern USA, Biogeochemistry, 57, 267–293, 2002.
Van der Krift, T. A. J., Kuikman, P. J., Moller, F., and Berendse, F.: Plant species and nutritional-mediated control over rhizodeposition and root decomposition, Plant Soil, 228, 191–200, https://doi.org/10.1023/a:1004834128220, 2001.
Van Groenigen, J. W., Lubbers, I. M., Vos, H. M. J., Brown, G. G., De Deyn, G. B., and Van Groenigen, K. J.: Earthworms increase plant production: a meta-analysis, Sci. Rep., 4, 6365, https://doi.org/10.1038/srep06365, 2014.
Van Groenigen, K. J., Six, J., Hungate, B. A., de Graaff, M. A., Van Breemen, N., and Van Kessel, C.: Element interactions limit soil carbon storage, P. Natl. Acad. Sci. USA, 103, 6571–6574, https://doi.org/10.1073/pnas.0509038103, 2006.
Van Vliet, P. C. J., Beare, M. H., Coleman, D. C., and Hendrix, P. F.: Effects of enchytraeids (Annelida: Oligochaeta) on soil carbon and nitrogen dynamics in laboratory incubations, Appl. Soil Ecol., 25, 147–160, 2004.
Verbaendert, I., Hoefman, S., Boeckx, P., Boon, N., and De Vos, P.: Primers for overlooked nirK, qnorB, and nosZ genes of thermophilic Gram-positive denitrifiers, FEMS Microbiol. Ecol., 89, 162–180, https://doi.org/10.1111/1574-6941.12346, 2014.
Veresoglou, S. D., Chen, B. D., and Rillig, M. C.: Arbuscular mycorrhiza and soil nitrogen cycling, Soil Biol. Biochem., 46, 53–62, https://doi.org/10.1016/j.soilbio.2011.11.018, 2012.
Verhoef, H. A. and Brussaard, L.: Decomposition and nitrogen mineralization in natural and agroecosystems: the contribution of soil animals, Biogeochemistry, 11, 175–211, https://doi.org/10.1007/bf00004496, 1990.
Vidon, P. and Hill, A. R.: Denitrification and patterns of electron donors and acceptors in eight riparian zones with contrasting hydrogeology, Biogeochemistry, 71, 259–283, 2004.
Vieten, B., Conen, F., Seth, B., and Alewell, C.: The fate of N2O consumed in soils, Biogeosciences, 5, 129–132, https://doi.org/10.5194/bg-5-129-2008, 2008.
Vitousek, P. M., Menge, D. N. L., Reed, S. C., and Cleveland, C. C.: Biological nitrogen fixation: rates, patterns and ecological controls in terrestrial ecosystems, P. T. Roy. Soc. B, 368, 20130119, https://doi.org/10.1098/rstb.2013.0119, 2013.
Walter, M. T., Walter, M. F., Brooks, E. S., Steenhuis, T. S., Boll, J., and Weiler, K.: Hydrologically sensitive areas: Variable source area hydrology implications for water quality risk assessment, J. Soil Water Conserv., 55, 277–284, 2000.
Wanek, W., Mooshammer, M., Blöchl, A., Hanreich, A., and Richter, A.: Determination of gross rates of amino acid production and immobilization in decomposing leaf litter by a novel 15N isotope pool dilution technique, Soil Biol. Biochem., 42, 1293–1302, 2010.
Wang, R., Willibald, G., Feng, Q., Zheng, X., Liao, T., Brüggemann, N., and Butterbach-Bahl, K.: Measurement of N2, N2O, NO, and CO2 emissions from soil with the gas-flow-soil-core technique, Environ. Sci. Technol., 45, 6066–6072, https://doi.org/10.1021/es1036578, 2011.
Wardle, D. A.: The influence of biotic interactions on soil biodiversity, Ecol. Lett., 9, 870–886, https://doi.org/10.1111/j.1461-0248.2006.00931.x, 2006.
Wardle, D. A., Bardgett, R. D., Klironomos, J. N., Setala, H., van der Putten, W. H., and Wall, D. H.: Ecological linkages between aboveground and belowground biota, Science, 304, 1629–1633, 2004.
Wassenaar, L. I.: Evaluation of the origin and fate of nitrate in the Abbbotsford Aquifer using isotopes of 15N and 18O in NO3-, Appl. Geochem., 10, 391–405, 1995.
Webster, E. A. and Hopkins, D. W.: Contributions from different microbial processes to N2O emission from soil under different moisture regimes, Biol. Fertility Soils, 22, 331–335, https://doi.org/10.1007/s003740050120, 1996.
Wedin, D. A. and Tilman, D.: Species effects on nitrogen cycling: a test with perennial grasses, Oecologia, 84, 433–441, 1990.
Well, R. and Butterbach-Bahl, K.: Comments on "A test of a field-based N-15-nitrous oxide pool dilution technique to measure gross N2O production in soil" by Yang et al. (2011), Global Change Biology, 17, 3577–3588, Global Change Biol., 19, 133–135, https://doi.org/10.1111/gcb.12005, 2013.
Werner, C., Butterbach-Bahl, K., Haas, E., Hickler, T., and Kiese, R.: A global inventory of N2O emissions from tropical rainforest soils using a detailed biogeochemical model, Global Biogeochem. Cy., 21, https://doi.org/10.1029/2006gb002909, 2007.
Werner, S. F., Driscoll, C. T., Groffman, P. M., and Yavitt, J. B.: Landscape patterns of soil oxygen and atmospheric greenhouse gases in a northern hardwood forest landscape, Biogeosciences Discuss., 8, 10859–10893, https://doi.org/10.5194/bgd-8-10859-2011, 2011.
Whalen, J. K. and Sampedro, L.: Soil Ecology & Management, Cambridge University Press, Cambridge, UK, 2010.
Whiteside, M. D., Garcia, M. O., and Treseder, K. K.: Amino acid uptake in arbuscular mycorrhizal plants, Plos One, 7, e47643, https://doi.org/10.1371/journal.pone.0047643, 2012.
Woli, K. P., David, M. B., Cooke, R. A., McIsaac, G. F., and Mitchell, C. A.: Nitrogen balance in and export from agricultural fields associated with controlled drainage systems and denitrifying bioreactors, Ecol. Eng., 36, 1558–1566, https://doi.org/10.1016/j.ecoleng.2010.04.024, 2010.
Wrage, N., Velthof, G. L., Van Beusichem, M. L., and Oenema, O.: Role of nitrifier denitrification in the production of nitrous oxide, Soil Biol. Biochem., 33, 1723–1732, 2001.
Wrage, N., Velthof, G. L., Laanbroek, H. J., and Oenema, O.: Nitrous oxide production in grassland soils: assessing the contribution of nitrifier denitrification, Soil Biol. Biochem., 36, 229–236, https://doi.org/10.1016/j.soilbio.2003.09.009, 2004a.
Wrage, N., Velthof, G. L., Oenema, O., and Laanbroek, H. J.: Acetylene and oxygen as inhibitors of nitrous oxide production in Nitrosomonas europaea and Nitrosospira briensis: a cautionary tale, FEMS Microbiol. Ecol., 47, 13–18, https://doi.org/10.1016/s0168-6496(03)00220-4, 2004b.
Wrage, N., Van Groenigen, J. W., Oenema, O., and Baggs, E. M.: A novel dual-isotope labeling method for distinguishing between soil sources of N2O, Rapid Commun. Mass Sp., 19, 3298–3306, 2005.
Wu, T. H.: Can ectomycorrhizal fungi circumvent the nitrogen mineralization for plant nutrition in temperate forest ecosystems?, Soil Biol. Biochem., 43, 1109–1117, https://doi.org/10.1016/j.soilbio.2011.02.003, 2011.
Wurzburger, N., Bellenger, J. P., Kraepiel, A. M. L., and Hedin, L. O.: Molybdenum and phosphorus interact to constrain asymbiotic nitrogen fixation in tropical forests, Plos One, 7, e33710, https://doi.org/10.1371/journal.pone.0033710, 2012.
Yanai, R. D., Vadeboncoeur, M. A., Hamburg, S. P., Arthur, M. A., Fuss, C. B., Groffman, P. M., Siccama, T. G., and Driscoll, C. T.: From missing source to missing sink: Long-term changes in the nitrogen budget of a northern hardwood forest, Environ. Sci. Technol., 47, 11440–11448, https://doi.org/10.1021/es4025723, 2013.
Yang, W. D. H., Teh, Y. A., and Silver, W. L.: A test of a field-based 15N-nitrous oxide pool dilution technique to measure gross N2O production in soil, Glob. Change Biol., 17, 3577–3588, https://doi.org/10.1111/j.1365-2486.2011.02481.x, 2011.
Yang, W. H. and Silver, W. L.: Application of the N2/Ar technique to measuring soil-atmosphere N2 fluxes, Rapid Commun. Mass Sp., 26, 449–459, https://doi.org/10.1002/rcm.6124, 2012.
Yang, W. H., McDowell, A. C., Brooks, P. D., and Silver, W. L.: New high precision approach for measuring 15N–N2 gas fluxes from terrestrial ecosystems, Soil Biol. Biochem., 69, 234–241, https://doi.org/10.1016/j.soilbio.2013.11.009, 2014.
Yano, M., Toyoda, S., Tokida, T., Hayashi, K., Hasegawa, T., Makabe, A., Koba, K., and Yoshida, N.: Isotopomer analysis of production, consumption and soil-to-atmosphere emission processes of N2O at the beginning of paddy field irrigation, Soil Biol. Biochem., 70, 66–78, https://doi.org/10.1016/j.soilbio.2013.11.026, 2014.
Yuan, Z. Y. and Chen, H. Y. H.: Fine root biomass, production, turnover rates, and nutrient contents in boreal forest ecosystems in relation to species, climate, fertility, and stand age: literature review and meta-analyses, Crit. Rev. Plant Sci., 29, 204–221, https://doi.org/10.1080/07352689.2010.483579, 2010.
Zak, D. R., Holmes, W. E., Finzi, A. C., Norby, R. J., and Schlesinger, W. H.: Soil nitrogen cycling under elevated CO2: A synthesis of forest face experiments, Ecol. Appl., 13, 1508–1514, 2003.
Zhu, X., Burger, M., Doane, T. A., and Horwath, W. R.: Ammonia oxidation pathways and nitrifier denitrification are significant sources of N2O and NO under low oxygen availability, P. Natl. Acad. Sci. USA, 110, 6328–6333, https://doi.org/10.1073/pnas.1219993110, 2013.