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Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO(2), warming, and drought
Depolymerization of high‐molecular weight organic nitrogen (N) represents the major bottleneck of soil N cycling and yet is poorly understood compared to the subsequent inorganic N processes. Given the importance of organic N cycling and the rise of global change, we investigated the responses of so...
Autores principales: | , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9306501/ https://www.ncbi.nlm.nih.gov/pubmed/34908205 http://dx.doi.org/10.1111/gcb.16035 |
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author | Maxwell, Tania L. Canarini, Alberto Bogdanovic, Ivana Böckle, Theresa Martin, Victoria Noll, Lisa Prommer, Judith Séneca, Joana Simon, Eva Piepho, Hans‐Peter Herndl, Markus Pötsch, Erich M. Kaiser, Christina Richter, Andreas Bahn, Michael Wanek, Wolfgang |
author_facet | Maxwell, Tania L. Canarini, Alberto Bogdanovic, Ivana Böckle, Theresa Martin, Victoria Noll, Lisa Prommer, Judith Séneca, Joana Simon, Eva Piepho, Hans‐Peter Herndl, Markus Pötsch, Erich M. Kaiser, Christina Richter, Andreas Bahn, Michael Wanek, Wolfgang |
author_sort | Maxwell, Tania L. |
collection | PubMed |
description | Depolymerization of high‐molecular weight organic nitrogen (N) represents the major bottleneck of soil N cycling and yet is poorly understood compared to the subsequent inorganic N processes. Given the importance of organic N cycling and the rise of global change, we investigated the responses of soil protein depolymerization and microbial amino acid consumption to increased temperature, elevated atmospheric CO(2), and drought. The study was conducted in a global change facility in a managed montane grassland in Austria, where elevated CO(2) (eCO(2)) and elevated temperature (eT) were stimulated for 4 years, and were combined with a drought event. Gross protein depolymerization and microbial amino acid consumption rates (alongside with gross organic N mineralization and nitrification) were measured using (15)N isotope pool dilution techniques. Whereas eCO(2) showed no individual effect, eT had distinct effects which were modulated by season, with a negative effect of eT on soil organic N process rates in spring, neutral effects in summer, and positive effects in fall. We attribute this to a combination of changes in substrate availability and seasonal temperature changes. Drought led to a doubling of organic N process rates, which returned to rates found under ambient conditions within 3 months after rewetting. Notably, we observed a shift in the control of soil protein depolymerization, from plant substrate controls under continuous environmental change drivers (eT and eCO(2)) to controls via microbial turnover and soil organic N availability under the pulse disturbance (drought). To the best of our knowledge, this is the first study which analyzed the individual versus combined effects of multiple global change factors and of seasonality on soil organic N processes and thereby strongly contributes to our understanding of terrestrial N cycling in a future world. |
format | Online Article Text |
id | pubmed-9306501 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-93065012022-07-28 Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO(2), warming, and drought Maxwell, Tania L. Canarini, Alberto Bogdanovic, Ivana Böckle, Theresa Martin, Victoria Noll, Lisa Prommer, Judith Séneca, Joana Simon, Eva Piepho, Hans‐Peter Herndl, Markus Pötsch, Erich M. Kaiser, Christina Richter, Andreas Bahn, Michael Wanek, Wolfgang Glob Chang Biol Research Articles Depolymerization of high‐molecular weight organic nitrogen (N) represents the major bottleneck of soil N cycling and yet is poorly understood compared to the subsequent inorganic N processes. Given the importance of organic N cycling and the rise of global change, we investigated the responses of soil protein depolymerization and microbial amino acid consumption to increased temperature, elevated atmospheric CO(2), and drought. The study was conducted in a global change facility in a managed montane grassland in Austria, where elevated CO(2) (eCO(2)) and elevated temperature (eT) were stimulated for 4 years, and were combined with a drought event. Gross protein depolymerization and microbial amino acid consumption rates (alongside with gross organic N mineralization and nitrification) were measured using (15)N isotope pool dilution techniques. Whereas eCO(2) showed no individual effect, eT had distinct effects which were modulated by season, with a negative effect of eT on soil organic N process rates in spring, neutral effects in summer, and positive effects in fall. We attribute this to a combination of changes in substrate availability and seasonal temperature changes. Drought led to a doubling of organic N process rates, which returned to rates found under ambient conditions within 3 months after rewetting. Notably, we observed a shift in the control of soil protein depolymerization, from plant substrate controls under continuous environmental change drivers (eT and eCO(2)) to controls via microbial turnover and soil organic N availability under the pulse disturbance (drought). To the best of our knowledge, this is the first study which analyzed the individual versus combined effects of multiple global change factors and of seasonality on soil organic N processes and thereby strongly contributes to our understanding of terrestrial N cycling in a future world. John Wiley and Sons Inc. 2022-01-10 2022-04 /pmc/articles/PMC9306501/ /pubmed/34908205 http://dx.doi.org/10.1111/gcb.16035 Text en © 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Maxwell, Tania L. Canarini, Alberto Bogdanovic, Ivana Böckle, Theresa Martin, Victoria Noll, Lisa Prommer, Judith Séneca, Joana Simon, Eva Piepho, Hans‐Peter Herndl, Markus Pötsch, Erich M. Kaiser, Christina Richter, Andreas Bahn, Michael Wanek, Wolfgang Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO(2), warming, and drought |
title | Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO(2), warming, and drought |
title_full | Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO(2), warming, and drought |
title_fullStr | Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO(2), warming, and drought |
title_full_unstemmed | Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO(2), warming, and drought |
title_short | Contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated CO(2), warming, and drought |
title_sort | contrasting drivers of belowground nitrogen cycling in a montane grassland exposed to a multifactorial global change experiment with elevated co(2), warming, and drought |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9306501/ https://www.ncbi.nlm.nih.gov/pubmed/34908205 http://dx.doi.org/10.1111/gcb.16035 |
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