Unexpected microbial metabolic responses to elevated temperatures and nitrogen addition in subarctic soils under different land uses
Subarctic regions are particularly affected by global warming. As vegetation periods lengthen, boreal forests could gradually be converted into agricultural land. How land use alters the susceptibility of soil organic matter decomposition to rising temperatures or how changes in nutrient availabilit...
Published in: | Biogeochemistry |
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2022
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ftopenagrar:oai:www.openagrar.de:openagrar_mods_00085452 2023-05-15T18:28:11+02:00 Unexpected microbial metabolic responses to elevated temperatures and nitrogen addition in subarctic soils under different land uses Schröder, Julia Peplau, Tino Gregorich, Edward Tebbe, Christoph Poeplau, Christopher 2022 https://doi.org/10.1007/s10533-022-00943-7 https://www.openagrar.de/receive/openagrar_mods_00085452 https://www.openagrar.de/servlets/MCRFileNodeServlet/openagrar_derivate_00051501/dn065023.pdf eng eng Biogeochemistry : an international journal -- 1939-1234 -- 0168-2563 -- 50671-0 https://doi.org/10.1007/s10533-022-00943-7 https://www.openagrar.de/receive/openagrar_mods_00085452 https://www.openagrar.de/servlets/MCRFileNodeServlet/openagrar_derivate_00051501/dn065023.pdf public https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess CC-BY Text ddc:363.7 ddc:570 ddc:540 ddc:630 18O-labelling -- Carbon use efficiency -- Incubation experiment -- Nitrogen fertilisation -- Temperature sensitivity -- qPCR article Text 2022 ftopenagrar https://doi.org/10.1007/s10533-022-00943-7 2023-03-06T00:08:06Z Subarctic regions are particularly affected by global warming. As vegetation periods lengthen, boreal forests could gradually be converted into agricultural land. How land use alters the susceptibility of soil organic matter decomposition to rising temperatures or how changes in nutrient availability, such as nitrogen (N) fertilisation, affect carbon (C) cycling is unknown. Microbial carbon use efficiency (CUE) defines how much of the decomposed soil organic carbon is directed to growth or lost to the atmosphere. Here, we investigated the response of CUE (24 h) and soil organic matter decomposition (50 days) to + 10 °C warming and N addition in three subarctic soils derived from paired plots (forest, grassland, cropland) in the Yukon, Canada. Contrary to our literature-based expectations, boreal forest soils did not demonstrate the most sensitive response to warming and N addition. Temperature sensitivity was not affected by land-use type. In contrast to a generally assumed decline, short-term warming increased CUE by + 30%, which was positively correlated with microbial growth. N addition reduced overall CUE by - 7%, in contrast to the expectation that CUE would rise due to the alleviation of nutrient limitations. The response to N addition was negatively correlated with the ratio of fungi to bacteria, and presumably depended on the prevailing N-fertilisation regime. The temperature sensitivity of microbial metabolism was driven by site-specific parameters rather than by land-use type. Our results indicate that it may not be necessary to consider land use-specific temperature sensitivities when modelling soil organic carbon dynamics under future climate conditions. Subarktische Regionen sind von der globalen Erwärmung besonders betroffen. Da sich die Vegetationsperioden verlängern, könnten die borealen Wälder verstärkt in landwirtschaftliche Nutzflächen umgewandelt werden. Es ist nicht bekannt, wie die Landnutzung die Temperatursensitvität der Zersetzung organischer Bodensubstanz oder wie sich Veränderungen ... Article in Journal/Newspaper Subarctic Yukon OpenAgrar (OA) Yukon Canada Biogeochemistry 160 1 105 125 |
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Open Polar |
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OpenAgrar (OA) |
op_collection_id |
ftopenagrar |
language |
English |
topic |
Text ddc:363.7 ddc:570 ddc:540 ddc:630 18O-labelling -- Carbon use efficiency -- Incubation experiment -- Nitrogen fertilisation -- Temperature sensitivity -- qPCR |
spellingShingle |
Text ddc:363.7 ddc:570 ddc:540 ddc:630 18O-labelling -- Carbon use efficiency -- Incubation experiment -- Nitrogen fertilisation -- Temperature sensitivity -- qPCR Schröder, Julia Peplau, Tino Gregorich, Edward Tebbe, Christoph Poeplau, Christopher Unexpected microbial metabolic responses to elevated temperatures and nitrogen addition in subarctic soils under different land uses |
topic_facet |
Text ddc:363.7 ddc:570 ddc:540 ddc:630 18O-labelling -- Carbon use efficiency -- Incubation experiment -- Nitrogen fertilisation -- Temperature sensitivity -- qPCR |
description |
Subarctic regions are particularly affected by global warming. As vegetation periods lengthen, boreal forests could gradually be converted into agricultural land. How land use alters the susceptibility of soil organic matter decomposition to rising temperatures or how changes in nutrient availability, such as nitrogen (N) fertilisation, affect carbon (C) cycling is unknown. Microbial carbon use efficiency (CUE) defines how much of the decomposed soil organic carbon is directed to growth or lost to the atmosphere. Here, we investigated the response of CUE (24 h) and soil organic matter decomposition (50 days) to + 10 °C warming and N addition in three subarctic soils derived from paired plots (forest, grassland, cropland) in the Yukon, Canada. Contrary to our literature-based expectations, boreal forest soils did not demonstrate the most sensitive response to warming and N addition. Temperature sensitivity was not affected by land-use type. In contrast to a generally assumed decline, short-term warming increased CUE by + 30%, which was positively correlated with microbial growth. N addition reduced overall CUE by - 7%, in contrast to the expectation that CUE would rise due to the alleviation of nutrient limitations. The response to N addition was negatively correlated with the ratio of fungi to bacteria, and presumably depended on the prevailing N-fertilisation regime. The temperature sensitivity of microbial metabolism was driven by site-specific parameters rather than by land-use type. Our results indicate that it may not be necessary to consider land use-specific temperature sensitivities when modelling soil organic carbon dynamics under future climate conditions. Subarktische Regionen sind von der globalen Erwärmung besonders betroffen. Da sich die Vegetationsperioden verlängern, könnten die borealen Wälder verstärkt in landwirtschaftliche Nutzflächen umgewandelt werden. Es ist nicht bekannt, wie die Landnutzung die Temperatursensitvität der Zersetzung organischer Bodensubstanz oder wie sich Veränderungen ... |
format |
Article in Journal/Newspaper |
author |
Schröder, Julia Peplau, Tino Gregorich, Edward Tebbe, Christoph Poeplau, Christopher |
author_facet |
Schröder, Julia Peplau, Tino Gregorich, Edward Tebbe, Christoph Poeplau, Christopher |
author_sort |
Schröder, Julia |
title |
Unexpected microbial metabolic responses to elevated temperatures and nitrogen addition in subarctic soils under different land uses |
title_short |
Unexpected microbial metabolic responses to elevated temperatures and nitrogen addition in subarctic soils under different land uses |
title_full |
Unexpected microbial metabolic responses to elevated temperatures and nitrogen addition in subarctic soils under different land uses |
title_fullStr |
Unexpected microbial metabolic responses to elevated temperatures and nitrogen addition in subarctic soils under different land uses |
title_full_unstemmed |
Unexpected microbial metabolic responses to elevated temperatures and nitrogen addition in subarctic soils under different land uses |
title_sort |
unexpected microbial metabolic responses to elevated temperatures and nitrogen addition in subarctic soils under different land uses |
publishDate |
2022 |
url |
https://doi.org/10.1007/s10533-022-00943-7 https://www.openagrar.de/receive/openagrar_mods_00085452 https://www.openagrar.de/servlets/MCRFileNodeServlet/openagrar_derivate_00051501/dn065023.pdf |
geographic |
Yukon Canada |
geographic_facet |
Yukon Canada |
genre |
Subarctic Yukon |
genre_facet |
Subarctic Yukon |
op_relation |
Biogeochemistry : an international journal -- 1939-1234 -- 0168-2563 -- 50671-0 https://doi.org/10.1007/s10533-022-00943-7 https://www.openagrar.de/receive/openagrar_mods_00085452 https://www.openagrar.de/servlets/MCRFileNodeServlet/openagrar_derivate_00051501/dn065023.pdf |
op_rights |
public https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s10533-022-00943-7 |
container_title |
Biogeochemistry |
container_volume |
160 |
container_issue |
1 |
container_start_page |
105 |
op_container_end_page |
125 |
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1766210565667028992 |