Articles | Volume 7, issue 2
SOIL, 7, 433–451, 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Original research article 21 Jul 2021
Original research article | 21 Jul 2021
Nutrient limitations regulate soil greenhouse gas fluxes from tropical forests: evidence from an ecosystem-scale nutrient manipulation experiment in Uganda
Joseph Tamale et al.
No articles found.
Benjamin Bukombe, Peter Fiener, Alison M. Hoyt, Laurent K. Kidinda, and Sebastian Doetterl
SOIL, 7, 639–659,Short summary
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.
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,Short summary
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.
Pengzhi Zhao, Daniel J. Fallu, Sara Cucchiaro, Paolo Tarolli, Clive Waddington, David Cockcroft, Lisa Snape, Andreas Lang, Sebastian Doetterl, Antony G. Brown, and Kristof Van Oost
Preprint under review for BGShort summary
We investigate the factors controlling SOC stability and temperature sensitivity of abandoned prehistoric agricultural terrace soils. Results suggest that the burial of former topsoil due to terracing provided a SOC stabilization mechanism. Both the soil C : N ratio and SOC mineral protection regulate soil SOC temperature sensitivity. However, which mechanism predominantly controls SOC temperature sensitivity depends on the age of the buried terrace soils.
Mario Reichenbach, Peter Fiener, Gina Garland, Marco Griepentrog, Johan Six, and Sebastian Doetterl
SOIL, 7, 453–475,Short summary
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.
Florian Wilken, Peter Fiener, Michael Ketterer, Katrin Meusburger, Daniel Iragi Muhindo, Kristof van Oost, and Sebastian Doetterl
SOIL, 7, 399–414,Short summary
This study demonstrates the usability of fallout radionuclides 239Pu and 240Pu as a tool to assess soil degradation processes in tropical Africa, which is particularly valuable in regions with limited infrastructure and challenging monitoring conditions for landscape-scale soil degradation monitoring. The study shows no indication of soil redistribution in forest sites but substantial soil redistribution in cropland (sedimentation >40 cm in 55 years) with high variability.
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,Short summary
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.
Pedro Batista, Peter Fiener, Simon Scheper, and Christine Alewell
Hydrol. Earth Syst. Sci. Discuss.,
Preprint under review for HESSShort summary
In central Switzerland, agricultural catchments have a large number of small fields, which are separated by linear features, such as roads and grass-strips. When eroded sediments are transported out of fields by surface runoff, these features can (dis)connect the sediment dynamics. By use of measured data and a simulation model, we demonstrated how the road network facilitates sediment transport from fields to water courses in a typical Swiss agricultural catchment.
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,Short summary
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,Short summary
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.
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
Revised manuscript accepted for SOILShort summary
We present a soil mid-infrared library with over 1,800 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 highly accurate predictions and highlight the value that our library contributes to existing data. Our library is openly available for public use and for expansion.
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,Short summary
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.
Laurent K. Kidinda, Folasade K. Olagoke, Cordula Vogel, Karsten Kalbitz, and Sebastian Doetterl
Preprint withdrawnShort summary
In deeply weathered tropical rainforest soils of Africa, we found that patterns of microbial processes differ between soils developed from geochemically contrasting parent materials due to differences in resource availability. Across investigated geochemical regions and soil depths, soil microbes were P-limited rather than N-limited. Topsoil microbes were more C-limited than their subsoil counterparts but inversely P-limited.
Florian Wilken, Michael Ketterer, Sylvia Koszinski, Michael Sommer, and Peter Fiener
SOIL, 6, 549–564,Short summary
Soil redistribution by water and tillage erosion processes on arable land is a major threat to sustainable use of soil resources. We unravel the role of tillage and water erosion from fallout radionuclide (239+240Pu) activities in a ground moraine landscape. Our results show that tillage erosion dominates soil redistribution processes and has a major impact on the hydrological and sedimentological connectivity, which started before the onset of highly mechanised farming since the 1960s.
Long Ho, Ruben Jerves-Cobo, Matti Barthel, Johan Six, Samuel Bode, Pascal Boeckx, and Peter Goethals
Revised manuscript not acceptedShort summary
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.
Stephen J. Harris, Jesper Liisberg, Longlong Xia, Jing Wei, Kerstin Zeyer, Longfei Yu, Matti Barthel, Benjamin Wolf, Bryce F. J. Kelly, Dioni I. Cendón, Thomas Blunier, Johan Six, and Joachim Mohn
Atmos. Meas. Tech., 13, 2797–2831,Short summary
The latest commercial laser spectrometers have the potential to revolutionize N2O isotope analysis. However, to do so, they must be able to produce trustworthy data. Here, we test the performance of widely used laser spectrometers for ambient air applications and identify instrument-specific dependencies on gas matrix and trace gas concentrations. We then provide a calibration workflow to facilitate the operation of these instruments in order to generate reproducible and accurate data.
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,Short summary
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.
Corey R. Lawrence, Jeffrey Beem-Miller, Alison M. Hoyt, Grey Monroe, Carlos A. Sierra, Shane Stoner, Katherine Heckman, Joseph C. Blankinship, Susan E. Crow, Gavin McNicol, Susan Trumbore, Paul A. Levine, Olga Vindušková, Katherine Todd-Brown, Craig Rasmussen, Caitlin E. Hicks Pries, Christina Schädel, Karis McFarlane, Sebastian Doetterl, Christine Hatté, Yujie He, Claire Treat, Jennifer W. Harden, Margaret S. Torn, Cristian Estop-Aragonés, Asmeret Asefaw Berhe, Marco Keiluweit, Ágatha Della Rosa Kuhnen, Erika Marin-Spiotta, Alain F. Plante, Aaron Thompson, Zheng Shi, Joshua P. Schimel, Lydia J. S. Vaughn, Sophie F. von Fromm, and Rota Wagai
Earth Syst. Sci. Data, 12, 61–76,Short summary
The International Soil Radiocarbon Database (ISRaD) is an an open-source archive of soil data focused on datasets including radiocarbon measurements. ISRaD includes data from bulk or
whole soils, distinct soil carbon pools isolated in the laboratory by a variety of soil fractionation methods, samples of soil gas or water collected interstitially from within an intact soil profile, CO2 gas isolated from laboratory soil incubations, and fluxes collected in situ from a soil surface.
Elizabeth Verhoeven, Matti Barthel, Longfei Yu, Luisella Celi, Daniel Said-Pullicino, Steven Sleutel, Dominika Lewicka-Szczebak, Johan Six, and Charlotte Decock
Biogeosciences, 16, 383–408,Short summary
This study utilized state-of-the-art measurements of nitrogen isotopes to evaluate nitrogen cycling and to assess the biological sources of the potent greenhouse gas, N2O, in response to water-saving practices in rice systems. Water-saving practices did emit more N2O, and high N2O production had a lower 15N isotope signature. Modeling and visual interpretation indicate that these emissions mostly came from denitrification or nitrifier denitrification, controlled upstream by nitrification rates.
Florian Wilken, Michael Sommer, Kristof Van Oost, Oliver Bens, and Peter Fiener
SOIL, 3, 83–94,Short summary
Model-based analyses of the effect of soil erosion on carbon (C) dynamics are associated with large uncertainties partly resulting from oversimplifications of erosion processes. This study evaluates the need for process-oriented modelling to analyse erosion-induced C fluxes in different catchments. The results underline the importance of a detailed representation of tillage and water erosion processes. For water erosion, grain-size-specific transport is essential to simulate lateral C fluxes.
Florian Wilken, Peter Fiener, and Kristof Van Oost
Earth Surf. Dynam., 5, 113–124,Short summary
This study presents a model that accounts for preferential erosion and transport of sediment and soil organic carbon in agricultural landscapes. We applied the model to a small catchment in Belgium for a period of 100 years. After a thorough model evaluation, these simulations shows that sediment and carbon export are highly episodic and that the temporal variability is largely influenced by selective erosion and deposition.
S. Doetterl, J.-T. Cornelis, J. Six, S. Bodé, S. Opfergelt, P. Boeckx, and K. Van Oost
Biogeosciences, 12, 1357–1371,Short summary
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.
P. Fiener, K. Auerswald, F. Winter, and M. Disse
Hydrol. Earth Syst. Sci., 17, 4121–4132,
Related subject area
Soils and atmosphereOxygen isotope exchange between water and carbon dioxide in soils is controlled by pH, nitrate and microbial biomass through links to carbonic anhydrase activityMicrobial community responses determine how soil–atmosphere exchange of carbonyl sulfide, carbon monoxide, and nitric oxide responds to soil moistureApplication of a laser-based spectrometer for continuous in situ measurements of stable isotopes of soil CO2 in calcareous and acidic soilsMitigating N2O emissions from soil: from patching leaks to transformative action
Sam P. Jones, Aurore Kaisermann, Jérôme Ogée, Steven Wohl, Alexander W. Cheesman, Lucas A. Cernusak, and Lisa Wingate
SOIL, 7, 145–159,Short summary
Understanding how the rate of oxygen isotope exchange between water and CO2 varies in soils is key for using the oxygen isotope composition of atmospheric CO2 as a tracer of biosphere CO2 fluxes at large scales. Across 44 diverse soils the rate of this exchange responded to pH, nitrate and microbial biomass, which are hypothesised to alter activity of the enzyme carbonic anhydrase in soils. Using these three soil traits, it is now possible to predict how this isotopic exchange varies spatially.
Thomas Behrendt, Elisa C. P. Catão, Rüdiger Bunk, Zhigang Yi, Elena Schweer, Steffen Kolb, Jürgen Kesselmeier, and Susan Trumbore
SOIL, 5, 121–135,Short summary
We measured net fluxes of OCS from nine soils with different land use in a dynamic chamber system and analyzed for one soil RNA relative abundance and gene transcripts. Our data suggest that indeed carbonic anhydrase (CA) plays an important role for OCS exchange, but the role of other enzymes might have been underestimated. Our study is the first assessment of the environmental significance of different microbial groups producing and consuming OCS by various enzymes other than CA.
Jobin Joseph, Christoph Külls, Matthias Arend, Marcus Schaub, Frank Hagedorn, Arthur Gessler, and Markus Weiler
SOIL, 5, 49–62,Short summary
By coupling an OA-ICOS with hydrophobic but gas-permeable membranes placed at different depths in acidic and calcareous soils, we investigated the contribution of abiotic and biotic components to total soil CO2 release. In calcareous Gleysol, CO2 originating from carbonate dissolution contributed to total soil CO2 concentration at detectable degrees, probably due to CO2 evasion from groundwater. Inward diffusion of atmospheric CO2 was found to be pronounced in the topsoil layers at both sites.
C. Decock, J. Lee, M. Necpalova, E. I. P. Pereira, D. M. Tendall, and J. Six
SOIL, 1, 687–694,Short summary
Further progress in understanding and mitigating N2O emissions from soil lies within transdisciplinary research that reaches across spatial scales and takes an ambitious look into the future.
Adamek, M., Corre, M. D., and Hölscher, D.: Early effect of elevated nitrogen input on above-ground net primary production of a lower montane rain forest, Panama, J. Trop. Ecol., 256, 637–647, https://doi.org/10.1017/S0266467409990253, 2009.
Arias-Navarro, C., Díaz-Pinés, E., Kiese, R., Rosenstock, T. S., Rufino, M. C., Stern, D., Neufeldt, H., Verchot, L. V., and Butterbach-Bahl, K.: Gas pooling: A sampling technique to overcome spatial heterogeneity of soil carbon dioxide and nitrous oxide fluxes, Soil Biol. Biochem., 67, 20–23, https://doi.org/10.1016/j.soilbio.2013.08.011, 2013.
Arias-Navarro, C., Díaz-Pinés, E., Zuazo, P., Rufino, M. C., Verchot, L. V., and Butterbach-Bahl, K.: Quantifying the contribution of land use to N2O, NO and CO2 fluxes in a montane forest ecosystem of Kenya, Biogeochemistry, 134, 95–114, https://doi.org/10.1007/s10533-017-0348-3, 2017.
Aronson, E. L. and Helliker, B. R.: Methane flux in non-wetland soils in response to nitrogen addition: A meta-analysis, Ecology, 91, 3242–3251, https://doi.org/10.1890/09-2185.1, 2010.
Aronson, E. L., Dierick, D., Botthoff, J. K., Oberbauer, S., Zelikova, T. J., Harmon, T. C., Rundel, P., Johnson, R. F., Swanson, A. C., Pinto-Tomás, A. A., Artavia-León, A., Matarrita-Carranza, B., and Allen, M. F.: ENSO-influenced drought drives methane flux dynamics in a tropical wet forest soil, J. Geophys. Res., 124, 2267–2276, https://doi.org/10.1029/2018JG004832, 2019.
Barkley, A. E., Prospero, J. M., Mahowald, N., Hamilton, D. S., Popendorf, K. J., Oehlert, A. M., Pourmand, A., Gatineau, A., Panechou-Pulcherie, K., Blackwelder, P., and Gaston, C. J.: African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean, P. Natl. Acad. Sci. USA, 116, 16216–16221, https://doi.org/10.1073/pnas.1906091116, 2019.
Baumgartner, S., Barthel, M., Drake, T. W., Bauters, M., Makelele, I. A., Mugula, J. K., Summerauer, L., Gallarotti, N., Cizungu Ntaboba, L., Van Oost, K., Boeckx, P., Doetterl, S., Werner, R. A., and Six, J.: Seasonality, drivers, and isotopic composition of soil CO2 fluxes from tropical forests of the Congo Basin, Biogeosciences, 17, 6207–6218, https://doi.org/10.5194/bg-17-6207-2020, 2020.
Bauters, M., Verbeeck, H., Rütting, T., Barthel, M., Bazirake Mujinya, B., Bamba, F., Bodé, S., Boyemba, F., Bulonza, E., Carlsson, E., Eriksson, L., Makelele, I., Six, J., Cizungu Ntaboba, L., and Boeckx, P.: Contrasting nitrogen fluxes in African tropical forests of the Congo Basin, Ecol. Monogr., 89, 1–17, https://doi.org/10.1002/ecm.1342, 2019.
Bobbink, R., Hicks, K., Galloway, J., Spranger, T., Alkemade, R., Ashmore, M., Bustamante, M., Cinderby, S., Davidson, E., Dentener, F., Emmett, B., Erisman, J. W., Fenn, M., Gilliam, F., Nordin, A., Pardo, L., and De Vries, W.: Global assessment of nitrogen deposition effects on terrestrial plant diversity: A synthesis, Ecol. Appl., 20, 30–59, https://doi.org/10.1890/08-1140.1, 2010.
Bodelier, P. L. E. and Steenbergh, A. K.: Interactions between methane and the nitrogen cycle in light of climate change, Curr. Opin. Env. Sust., 9–10, 26–36, https://doi.org/10.1016/j.cosust.2014.07.004, 2014.
Bréchet, L., Courtois, E. A., Saint-Germain, T., Janssens, I. A., Asensio, D., Ramirez-Rojas, I., Soong, J. L., Van Langenhove, L., Verbruggen, E., and Stahl, C.: Disentangling drought and nutrient effects on soil carbon dioxide and methane fluxes in a tropical forest, Frontiers in Environmental Sciences, 7, 180, https://doi.org/10.3389/fenvs.2019.00180, 2019.
Brune, A.: Symbiotic digestion of lignocellulose in termite guts, Nat. Rev. Microbiol., 12, 168–180, https://doi.org/10.1038/nrmicro3182, 2014.
Burton, A. J., Pregitzer, K. S., Crawford, J. N., Zogg, G. P., and Zak, D. R.: Simulated chronic deposition reduces soil respiration in northern hardwood forests, Glob. Change Biol., 10, 1080–1091, https://doi.org/10.1111/j.1365-2486.2004.00737.x, 2004.
Butterbach-Bahl, K., Kock, M., Willibald, G., Hewett, B., Buhagiar, S., Papen, H., and Kiese, R.: Temporal variations of fluxes of NO, NO2, N2O, CO2, and CH4 in a tropical rain forest ecosystem, Global Biogeochem. Cy., 18, 1–11, https://doi.org/10.1029/2004GB002243, 2004.
Butterbach-Bahl, K., Kiese, R., and Liu, C.: Measurements of biosphere–atmosphere exchange of CH4 in terrestrial ecosystems, Method. Enzymol., 495, 271–287, https://doi.org/10.1016/B978-0-12-386905-0.00018-8, 2011.
Cernusak, L. A., Winter, K., Dalling, J. W., Holtum, J. A., Jaramillo, C., Körner, C., Leakey, A. D., Norby, R. J., Poulter, B., Turner, B. L., and Wright, S. J.: Tropical forest responses to increasing atmospheric CO2: current knowledge and opportunities for future research. Funct. Plant Biol., 40, 531–551, https://doi.org/10.1071/FP12309, 2013.
Chen, D., Zhou, L., Rao, X., Lin, Y., and Fu, S.: Effects of root diameter and root nitrogen concentration on in situ root respiration among different seasons and tree species, Ecol. Res., 25, 983–993, https://doi.org/10.1007/s11284-010-0722-2, 2010.
Cleveland, C. C. and Townsend, A. R.: Nutrient additions to a tropical rain forest drive substantial soil carbon dioxide losses to the atmosphere, P. Natl. Acad. Sci. USA, 103, 10316–10321, https://doi.org/10.1073/pnas.0600989103, 2006.
Corre, M. D., Veldkamp, E., Arnold, J., and Wright, S. J.: Impact of elevated N input on soil N cycling and losses in old-growth lowland and montane forests in Panama. Ecology, 91, 1715–1729, https://doi.org/10.1890/09-0274.1, 2010.
Corre, M. D., Sueta, J. P., and Veldkamp, E.: Nitrogen-oxide emissions from tropical forest soils exposed to elevated nitrogen input strongly interact with rainfall quantity and seasonality, Biogeochemistry, 118, 103–120, https://doi.org/10.1007/s10533-013-9908-3, 2014.
Cusack, D. F., Silver, W. L., Torn, M. S., Burton, S. D., and Firestone, M. K.: Changes in microbial community characteristics and soil organic matter with nitrogen additions in two tropical forests, Ecology, 92, 621–632, https://doi.org/10.1890/10-0459.1, 2011.
Davidson, E. A., Keller, M., Erickson, H. E., Verchot, L. V., and Veldkamp, E.: Testing a conceptual model of soil emissions of nitrous and nitric oxides, Bioscience, 50, 667–680, https://doi.org/10.1641/0006-3568(2000)050[0667:TACMOS]2.0.CO;2, 2000.
DeForest, J. L., Noormets, A., McNulty, S. G., Sun, G., Tenney, G., and Chen, J.: Phenophases alter the soil respiration-temperature relationship in an oak-dominated forest, Int. J. Biometeorol., 51, 135–144, https://doi.org/10.1007/s00484-006-0046-7, 2006.
Doetterl, S., Stevens, A., Six, J., Merckx, R., Oost, K. Van, Pinto, M. C., Casanova-Katny, A., Muñoz, C., Boudin, M., Venegas, E. Z., and Boeckx, P.: Soil carbon storage controlled by interactions between geochemistry and climate, Nat. Geosci., 8, 780–783, https://doi.org/10.1038/NGEO2516, 2015.
Du, E., Xia, N., and de Vries, W.: Effects of nitrogen deposition on growing-season soil methane sink across global forest biomes, Biogeosciences Discuss. [preprint], https://doi.org/10.5194/bg-2019-29, 2019.
Dutaur, L. and Verchot, L. V.: A global inventory of the soil CH4 sink, Global Biogeochem. Cy., 21, 1–9, https://doi.org/10.1029/2006GB002734, 2007.
Eggeling, W. J.: Observations on the ecology of the Budongo rainforest, Uganda, J. Ecol., 34, 20–87, https://doi.org/10.2307/2256760, 1947.
Fanin, N., Hättenschwiler, S., Schimann, H., and Fromin, N.: Interactive effects of C, N and P fertilization on soil microbial community structure and function in an Amazonian rain forest, Funct. Ecol., 29, 140–150, https://doi.org/10.1111/1365-2435.12329, 2015.
Galloway, J., Dentener, F., Capone, D., Boyer, E., and Howarth, R.: Nitrogen cycles: past, present, and future, Biogeochemistry, 70, 153–226, https://doi.org/10.1007/s10533-004-0370-0, 2004.
Giglio, L., Csiszar, I., and Justice, C. O.: Global distribution and seasonality of active fires as observed with Terra and Aqua Moderate Resolution Imaging Spectroradiometers (MODIS) sensors, J. Geophys. Res., 111, G02016, https://doi.org/10.1029/2005JG000142, 2006.
Gray, N. D., McCann, C. M., Christgen, B., Ahammad, S. Z., Roberts, J. A., and Graham, D. W.: Soil geochemistry confines microbial abundances across an arctic landscape; implications for net carbon exchange with the atmosphere, Biogeochemistry, 120, 307–317, https://doi.org/10.1007/s10533-014-9997-7, 2014.
Gütlein, A., Gerschlauer, F., Kikoti, I., and Kiese, R.: Impacts of climate and land use on N2O and CH4 fluxes from tropical ecosystems in the Mt. Kilimanjaro region, Tanzania, Glob. Change Biol., 24, 1239–1255, https://doi.org/10.1111/gcb.13944, 2018.
Hall, S. J. and Matson P. A.: Nutrient status of tropical rain forests influences soil N dynamics after N additions. Ecol. Monogr., 73, 107–129, jstor.org/stable/3100077, 2003.
Hashimoto, S., Tanaka, N., Suzuki, M., Inoue, A., Takizawa, H., Kosaka, I., Tanaka, K., Tantasirin, C., and Tangtham, N.: Soil respiration and soil CO2 concentration in a tropical forest, Thailand, J. For. Res.-Jpn., 9, 75–79, https://doi.org/10.1007/s10310-003-0046-y, 2004.
Hassler, E., Corre, M. D., Tjoa, A., Damris, M., Utami, S. R., and Veldkamp, E.: Soil fertility controls soil–atmosphere carbon dioxide and methane fluxes in a tropical landscape converted from lowland forest to rubber and oil palm plantations, Biogeosciences, 12, 5831–5852, https://doi.org/10.5194/bg-12-5831-2015, 2015.
Hedin, L. O., Vitousek, P. M., and Matson, P. A.: Nutrient losses over four million years of tropical forest development, Ecology., 84, 2231–2255, https://doi.org/10.1890/02-4066, 2003.
Hicks, L. C., Meir, P., Nottingham, A. T., Reay, D. S., Stott, A. W., Salinas, N., and Whitaker, J.: Carbon and nitrogen inputs differentially affect priming of soil organic matter in tropical lowland and montane soils, Soil Biol. Biochem., 129, 212–222, https://doi.org/10.1016/j.soilbio.2018.10.015, 2019.
Hobbie, S. E. and Vitousek, P. M.: Nutrient limitation of decomposition in Hawaiian forests, Ecology, 81, 1867–1877, https://doi.org/10.1890/0012-9658(2000)081[1867:NLODIH]2.0.CO;2, 2000.
Holland, E. A., Neff, J. C., Townsend, A. R., and McKeown, B.: Uncertainties in the temperature sensitivity of decomposition in tropical and subtropical ecosystems: Implications for models, Global Biogeochem. Cy., 14, 1137–1151, https://doi.org/10.1029/2000GB001264, 2000.
Iddris, N. A.-A., Corre, M. D., Yemefack, M., van Straaten, O., and Veldkamp, E.: Stem and soil nitrous oxide fluxes from rainforest and cacao agroforest on highly weathered soils in the Congo Basin, Biogeosciences, 17, 5377–5397, https://doi.org/10.5194/bg-17-5377-2020, 2020.
IUSS Working Group WRB: World reference base for soil resources 2014. International soil classification system for naming soils and creating legends for soil maps, FAO, Rome, Italy, 106, 2014.
Jiang, X., Chen, H., Peng, C., Li, Y., He, Y., Chen, D., Lin, M., Hu, J., Ma, T., Liu, L., Liu, X., Xia, M., and Liu, Y.: Soil carbon dioxide fluxes from three forest types of the tropical montane rainforest on Hainan Island, China, Water Air Soil Poll., 227, 1–14, https://doi.org/10.1007/s11270-016-2904-1, 2016.
Jobbágy, E. G. and Jackson, R. B.: The vertical distribution of soil organic carbon and its relation to climate and vegetation, Ecol. Appl., 10, 423–436, https://doi.org/10.1890/1051-0761(2000)010[0423:TVDOSO]2.0.CO;2, 2000.
John, R., Dalling, J. W., Harms, K. E., Yavitt, J. B., Stallard, R. F., Mirabello, M., Hubbell, S. P., Valencia, R., Navarrete, H., Vallejo, M., and Foster, R. B.: Soil nutrients influence spatial distributions of tropical trees species, P. Natl. Acad. Sci. USA, 104, 864–869, https://doi.org/10.1073/pnas.0604666104, 2007.
Kaspari, M., Garcia, M. N., Harms, K. E., Santana, M., Wright, S. J., and Yavitt, J. B.: Multiple nutrients limit litterfall and decomposition in a tropical forest, Ecol. Lett., 11, 35–43, https://doi.org/10.1111/j.1461-0248.2007.01124.x, 2008.
Koehler, B., Corre, M. D., Veldkamp, E., and Sueta, J. P.: Chronic nitrogen addition causes a reduction in soil carbon dioxide efflux during the high stem-growth period in a tropical montane forest but no response from a tropical lowland forest on a decadal time scale, Biogeosciences, 6, 2973–2983, https://doi.org/10.5194/bg-6-2973-2009, 2009a.
Koehler, B., Corre, M. D., Veldkamp, E., Wullaert, H., and Wright, S. J.: Immediate and long-term nitrogen oxide emissions from tropical forest soils exposed to elevated nitrogen input, Glob. Change Biol., 15, 2049–2066, https://doi.org/10.1111/j.1365-2486.2008.01826.x, 2009b.
Li, Y., Xu, M., and Zou, X.: Effects of nutrient additions on ecosystem carbon cycle in a Puerto Rican tropical wet forest, Glob. Change Biol., 12, 284–293, https://doi.org/10.1111/j.1365-2486.2005.01096.x, 2006.
Li, Y., Sun, J., Tian, D., Wang, J., Ha, D., Qu, Y., Jing, G., and Niu, S.: Soil acid cations induced reduction in soil respiration under nitrogen enrichment and soil acidification, Sci. Total Environ., 615, 1535–1546, https://doi.org/10.1016/j.scitotenv.2017.09.131, 2018.
Lohse, K. A. and Matson, P.: Consequences of nitrogen additions for soil losses from wet tropical forests, Ecol. Appl., 15, 1629–1648, https://doi.org/10.1890/03-5421, 2005.
Lukwago, W., Behangana, M., Mwavu, E. N., and Hughes, D. F.: Effects of selective timber harvest on amphibian species diversity in Budongo forest Reserve, Uganda, Forest Ecol. Manag., 458, 1–7, https://doi.org/10.1016/j.foreco.2019.117809, 2020.
Ma, S., Chen, G., Tian, D., Du, E., Xiao, W., Jiang, L., Zhou, Z., Zhu, J., He, H., Zhu, B., and Fang, J.: Effects of seven-year nitrogen and phosphorus additions on soil microbial community structures and residues in a tropical forest in Hainan Island, China, Geoderma, 361, 114034, https://doi.org/10.1016/j.geoderma.2019.114034, 2020.
Malhi, Y. and Phillips, O. L.: Tropical forests and global atmospheric change: A synthesis, Philos. Tr. Roy. Soc. B, 359, 549–555, https://doi.org/10.1098/rstb.2003.1449, 2004.
Martinson, G. O., Corre, M. D., and Veldkamp, E.: Responses of nitrous oxide fluxes and soil nitrogen cycling to nutrient additions in montane forests along an elevation gradient in southern Ecuador, Biogeochemistry, 112, 625–636, https://doi.org/10.1007/s10533-012-9753-9, 2013.
Matson, A. L., Corre, M. D., and Veldkamp, E.: Nitrogen cycling in canopy soils of tropical montane forests responds rapidly to indirect N and P fertilization, Glob. Change Biol., 20, 3802–3813, https://doi.org/10.1111/gcb.12668, 2014.
Matson, A. L., Corre, M. D., Langs, K., and Veldkamp, E.: Soil trace gas fluxes along orthogonal precipitation and soil fertility gradients in tropical lowland forests of Panama, Biogeosciences, 14, 3509–3524, https://doi.org/10.5194/bg-14-3509-2017, 2017.
McGroddy, M. E., Baisden, W. T., and Hedin, L. O.: Stoichiometry of hydrological C, N, and P losses across climate and geology: An envionmental matrix approach across New Zealand primary forests, Global Biogeochem. Cy., 22, 1–14, https://doi.org/10.1029/2007GB003005, 2008.
Mori, T., Ohta, S., Ishizuka, S., Konda, R., Wicaksono, A., Heriyanto, J., and Hardjono, A.: Effects of phosphorus addition on N2O and NO emissions from soils of an Acacia mangium plantation, Soil Sci. Plant Nutr., 56, 782–788, https://doi.org/10.1111/j.1747-0765.2010.00501.x, 2010.
Mori, T., Ohta, S., Ishizuka, S., Konda, R., Wicaksono, A., Heriyanto, J., and Hardjono, A.: Effects of phosphorus application on root respiration and heterotrophic microbial respiration in Acacia mangium plantation soil, Tropics, 22, 113–118, https://doi.org/10.3759/tropics.22.113, 2013.
Mori, T., Wachrinrat, C., Staporn, D., Meunpong, P., Suebsai, W., Matsubara, K., Boonsri, K., Lumban, W., Kuawong, M., Phukdee, T., Srifai, J., and Boonman, K.: Effects of phosphorus addition on nitrogen cycle and fluxes of N2O and CH4 in tropical tree plantation soils in Thailand, Agr. Nat. Res., 51, 91–95, https://doi.org/10.1016/j.anres.2016.03.002, 2017.
Mori, T., Lu, X., Aoyagi, R., and Mo, J.: Reconsidering the phosphorus limitation of soil microbial activity in tropical forests, Funct. Ecol., 32, 1145–1154, https://doi.org/10.1111/1365-2435.13043, 2018.
Mosier, A., Wassmann, R., Verchot, L., King, J., and Palm, C.: Methane and nitrogen oxide fluxes in tropical agricultural soils: Sources, sinks and mechanisms, Environ. Dev. Sustain., 6, 11–49, https://doi.org/10.1023/B:ENVI.0000003627.43162.ae, 2004.
Müller, A. K., Matson, A. L., Corre, M. D., and Veldkamp, E.: Soil N2O fluxes along an elevation gradient of tropical montane forests under experimental nitrogen and phosphorus addition, Front. Earth Sci., 3, 66, https://doi.org/10.3389/feart.2015.00066, 2015.
Nauer, P. A., Hutley, L. B., and Arndt, S. K.: Termite mounds mitigate half of termite methane emissions, P. Natl. Acad. Sci. USA, 115, 13306–13311, https://doi.org/10.1073/pnas.1809790115, 2018.
Nottingham, A. T., Whitaker, J., Turner, B. L., Salinas, N., Zimmermann, M., Malhi, Y., and Meir, P.: Climate Warming and Soil Carbon in Tropical Forests: Insights from an Elevation Gradient in the Peruvian Andes, Bioscience, 65, 906–921, https://doi.org/10.1093/biosci/biv109, 2015.
Oertel, C., Matschullat, J., Zurba, K., Zimmermann, F., and Erasmi, S.: Greenhouse gas emissions from soils – A review, Chemie der Erde, 76, 327–352, https://doi.org/10.1016/j.chemer.2016.04.002, 2016.
Pavelka, M., Acosta, M., Kiese, R., Altimir, N., Brümmer, C., Crill, P., Darenova, E., Fuß, R., Gielen, B., Graf, A., and Klemedtsson, L.: Standardization of chamber technique for CO2, N2O and CH4 fluxes measurements from terrestrial ecosystems, Int. Agrophys., 32, 569–587, https://doi.org/10.1515/intag-2017-0045, 2018.
Pendall, E., Schwendenmann, L., Rahn, T., Miller, J. B., Tans, P. P., and White, J. W. C.: Land use and season affect fluxes of CO2, CH4, CO, N2O and H2 and isotopic source signatures in Panama: Evidence from nocturnal boundary layer profiles, Glob. Change Biol., 16, 2721–2736, https://doi.org/10.1111/j.1365-2486.2010.02199.x, 2010.
R Development Core Team: a language and environment for statistical computing, R Foundation for Statistical Computing, Vienna, Austria, 2019.
Roberts, G., Wooster, M. J., and Lagoudakis, E.: Annual and diurnal african biomass burning temporal dynamics, Biogeosciences, 6, 849–866, https://doi.org/10.5194/bg-6-849-2009, 2009.
Saatchi, S. S., Harris, N. L., Brown, S., Lefsky, M., Mitchard, E. T. A., Salas, W., Zutta, B. R., Buermann, W., Lewis, S. L., Hagen, S., Petrova, S., White, L., Silman, M., and Morel, A.: Benchmark map of forest carbon stocks in tropical regions across three continents, P. Natl. Acad. Sci. USA, 108, 9899–9904, https://doi.org/10.1073/pnas.1019576108, 2011.
Seghers, D., Top, E. M., Reheul, D., Bulcke, R., Boeckx, P., Verstraete, W., and Siciliano, S. D.: Long-term effects of mineral versus organic fertilizers on activity and structure of the methanotrophic community in agricultural soils, Environ. Microbiol., 5, 867–877, https://doi.org/10.1046/j.1462-2920.2003.00477.x, 2003.
Sjögersten, S., Aplin, P., Gauci, V., Peacock, M., Siegenthaler, A., and Turner, B. L.: Temperature response of ex-situ greenhouse gas emissions from tropical peatlands: Interactions between forest type and peat moisture conditions, Geoderma, 324, 47–55, https://doi.org/10.1016/j.geoderma.2018.02.029, 2018.
Soong, J. L., Marañon-Jimenez, S., Cotrufo, M. F., Boeckx, P., Bodé, S., Guenet, B., Peñuelas, J., Richter, A., Stahl, C., Verbruggen, E., and Janssens, I. A.: Soil microbial CNP and respiration responses to organic matter and nutrient additions: Evidence from a tropical soil incubation, Soil Biol. Biochem., 122, 141–149, https://doi.org/10.1016/j.soilbio.2018.04.011, 2018.
Sousa Neto, E., Carmo, J. B., Keller, M., Martins, S. C., Alves, L. F., Vieira, S. A., Piccolo, M. C., Camargo, P., Couto, H. T. Z., Joly, C. A., and Martinelli, L. A.: Soil-atmosphere exchange of nitrous oxide, methane and carbon dioxide in a gradient of elevation in the coastal Brazilian Atlantic forest, Biogeosciences, 8, 733–742, https://doi.org/10.5194/bg-8-733-2011, 2011.
Tamatamah, R. A., Hecky, R. E., and Duthie, H. C.: The atmospheric deposition of phosphorus in Lake Victoria (East Africa), Biogeochemistry, 73, 325–344, https://doi.org/10.1007/s10533-004-0196-9, 2005.
Tanner, E. V. J., Vltousek, P. M., and Cuevas, E.: Experimental investigation of nutrient limitation of forest growth on wet tropical mountains, Ecology, 79, 10–22, https://doi.org/10.1890/0012-9658(1998)079[0010:EIONLO]2.0.CO;2, 1998.
Townsend, A. R., Vitousek, P. M., and Trumbore, S. E.: Soil organic matter dynamics along gradients in temperature and land use on the island of Hawaii, Ecology, 76, 721–733, https://doi.org/10.2307/1939339, 1995.
van Straaten, H. P.: Präkambrium und junges Western Rift im Bunyoro Distrikt, NW- Uganda (Ostafrika), in: Geologisches Jahrbuch, Reihe B, Heft 18. Hannover, Schweizerbart Science Publishers, 1976.
van Straaten, O., Veldkamp, E., and Corre, M. D.: Simulated drought reduces soil CO2 efflux and production in a tropical forest in Sulawesi, Indonesia, Ecosphere, 2, 1–22, https://doi.org/10.1890/es11-00079.1, 2011.
Veber, G., Kull, A., Villa, J. A., Maddison, M., Paal, J., Oja, T., Iturraspe, R., Pärn, J., Teemusk, A., and Mander, Ü.: Greenhouse gas emissions in natural and managed peatlands of America: Case studies along a latitudinal gradient, Ecol. Eng.,114, 34–45, https://doi.org/10.1016/j.ecoleng.2017.06.068, 2018.
Veldkamp, E., Koehler, B., and Corre, M. D.: Indications of nitrogen-limited methane uptake in tropical forest soils, Biogeosciences, 10, 5367–5379, https://doi.org/10.5194/bg-10-5367-2013, 2013.
Verchot, L. V., Dannenmann, M., Kengdo, S. K., Njine-Bememba, C. B., Rufino, M. C., Sonwa, D. J., and Tejedor, J.: Land-use change and Biogeochemical controls of soil CO2, N2O and CH4 fluxes in Cameroonian forest landscapes, J. Integr. Environ. Sci., 17, 1–23, https://doi.org/10.1080/1943815X.2020.1779092, 2020.
Wang, C. K. and Yang J. Y.: Rhizospheric and heterotrophic components of soil respiration in six Chinese temperate forests. Glob. Change Biol., 13, 123–131, https://doi.org/10.1111/j.1365-2486.2006.01291.x, 2007.
Wang, Z., Zhang, X., Liu, L., Cheng, M., and Xu, J.: Spatial and seasonal patterns of atmospheric nitrogen deposition in North China, Atmos. Sci. Lett., 13, 188–194, https://doi.org/10.1080/16742834.2019.1701385, 2020.
Wanyama, I., Pelster, D. E., Butterbach-Bahl, K., Verchot, L. V., Martius, C., and Rufino, M. C.: Soil carbon dioxide and methane fluxes from forests and other land use types in an African tropical montane region, Biogeochemistry, 143, 171–190, https://doi.org/10.1007/s10533-019-00555-8, 2019.
Wei, Z., Jiangming, M., Yunting, F., Xiankai, L., and Hui, W.: Effects of nitrogen deposition on the greenhouse gas fluxes from forest soils, Acta Ecologica Sinica, 28, 2309–2319, https://doi.org/10.1016/S1872-2032(08)60047-5, 2008.
Wolf, K., Veldkamp, E., Homeier, J., and Martinson, G. O.: Nitrogen availability links forest productivity, soil nitrous oxide and nitric oxide fluxes of a tropical montane forest in southern Ecuador, Global Biogeochem. Cy., 25, 1–12, https://doi.org/10.1029/2010GB003876, 2011.
Wright, S. J., Yavitt, J. B., Wurzburger, N., Turner, B. L., Tanner, E. V., Sayer, E. J., Santiago, L. S., Kaspari, M., Hedin, O, L., Harms, E, K., Garcia, N. M., and Corre, M. D.: Potassium, phosphorus, or nitrogen limit root allocation, tree growth, or litter production in a lowland tropical forest. Ecology, 92, 1616–1625, https://doi.org/10.1890/10-1558.1, 2011.
Xu, H., Detto, M., Fang, S., Chazdon, R. L., Li, Y., Hau, B. C. H., Fischer, G. A., Weiblen, G. D., Hogan, J. A., Zimmerman, J. K., Uriarte, M., Thompson, J., Lian, J., Cao, K., Kenfack, D., Alonso, A., Bissiengou, P., Memiaghe, H. R., Valencia, R., Yap, S. L., Davies, S. J., Mi, X., and Yao, T. L.: Soil nitrogen concentration mediates the relationship between leguminous trees and neighbor diversity in tropical forests, Communications Biology, 3, 1–8, https://doi.org/10.1038/s42003-020-1041-y, 2020.
Yan, Y., Sha, L., Cao, M., Zheng, Z., Tang, J., Wang, Y., Zhang, Y., Wang, R., Liu, G., Wang, Y., and Sun, Y.: Fluxes of CH4 and N2O from soil under a tropical seasonal rain forest in Xishuangbanna, Southwest China, J. Environ. Sci., 20, 207–215, https://doi.org/10.1016/S1001-0742(08)60033-9, 2008.
Yan, G., Xing, Y., Xu, L., Wang, J., Dong, X., Shan, W., Guo, L., and Wang, Q.: Effects of different nitrogen additions on soil microbial communities in different seasons in a boreal forest, Ecosphere, 8, 1–19, https://doi.org/10.1002/ecs2.1879, 2017.
Yu, L., Wang, Y., Zhang, X., Dörsch, P., and Mulder, J.: Phosphorus addition mitigates N2O and CH4 emissions in N-saturated subtropical forest, SW China, Biogeosciences, 14, 3097–3109, https://doi.org/10.5194/bg-14-3097-2017, 2017.
Zhang, T., Zhu, W., Mo, J., Liu, L., and Dong, S.: Increased phosphorus availability mitigates the inhibition of nitrogen deposition on CH4 uptake in an old-growth tropical forest, southern China, Biogeosciences, 8, 2805–2813, https://doi.org/10.5194/bg-8-2805-2011, 2011.
Zhang, W., Mo, J., Yu, G., Fang, Y., Li, D., Lu, X., and Wang, H.: Emissions of nitrous oxide from three tropical forests in Southern China in response to simulated nitrogen deposition, Plant Soil, 306, 221–236, https://doi.org/10.1007/s11104-008-9575-7, 2008.
Zhang, Y., Ma, M., Fang, H., Qin, D., Cheng, S., and Yuan, W.: Impacts of nitrogen addition on nitrous oxide emission: Comparison of five nitrous oxide modules or algorithms, Ecol. Model., 421, 108963, https://doi.org/10.1016/j.ecolmodel.2020.108963, 2020.
Zheng, M., Zhang, T., Liu, L., Zhang, W., Lu, X., and Mo, J.: Effects of nitrogen and phosphorus additions on soil methane uptake in disturbed forests, J. Geophys. Res., 121, 3089–3100, https://doi.org/10.1002/2016JG003476, 2016.
Soil greenhouse gas (GHG) fluxes were measured monthly from nitrogen (N), phosphorous (P), N and P, and control plots of the first nutrient manipulation experiment located in an African pristine tropical forest using static chambers. The results suggest (1) contrasting soil GHG responses to nutrient addition, hence highlighting the complexity of the tropical forests, and (2) that the feedback of tropical forests to the global soil GHG budget could be altered by changes in N and P availability.
Soil greenhouse gas (GHG) fluxes were measured monthly from nitrogen (N), phosphorous (P), N and...