Intensified plant N and C pool with more available nitrogen under experimental warming in an alpine meadow ecosystem
Abstract Nitrogen (N) availability is projected to increase in a warming climate. But whether the more available N is immobilized by microbes (thus stimulates soil carbon (C) decomposition), or is absorbed by plants (thus intensifies C uptake) remains unknown in the alpine meadow ecosystem. Infrared...
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crwiley:10.1002/ece3.2583 2024-09-15T18:30:05+00:00 Intensified plant N and C pool with more available nitrogen under experimental warming in an alpine meadow ecosystem Peng, Fei Xue, Xian You, Quangang Xu, Manhou Chen, Xiang Guo, Jian Wang, Tao National Natural Science Foundation of China Chinese Academy of Sciences 2016 http://dx.doi.org/10.1002/ece3.2583 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.2583 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.2583 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.2583 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 6, issue 23, page 8546-8555 ISSN 2045-7758 2045-7758 journal-article 2016 crwiley https://doi.org/10.1002/ece3.2583 2024-08-09T04:24:13Z Abstract Nitrogen (N) availability is projected to increase in a warming climate. But whether the more available N is immobilized by microbes (thus stimulates soil carbon (C) decomposition), or is absorbed by plants (thus intensifies C uptake) remains unknown in the alpine meadow ecosystem. Infrared heaters were used to simulate climate warming with a paired experimental design. Soil ammonification, nitrification, and net mineralization were obtained by in situ incubation in a permafrost region of the Qinghai‐Tibet Plateau (QTP). Available N significantly increased due to the stimulation of net nitrification and mineralization in 0–30 cm soil layer. Microbes immobilized N in the end of growing season in both warming and control plots. The magnitude of immobilized N was lower in the warming plots. The root N concentration significantly reduced, but root N pool intensified due to the significant increase in root biomass in the warming treatment. Our results suggest that a warming‐induced increase in biomass is the major N sink and will continue to stimulate plant growth until plant N saturation, which could sustain the positive warming effect on ecosystem productivity. Article in Journal/Newspaper permafrost Wiley Online Library Ecology and Evolution 6 23 8546 8555 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Nitrogen (N) availability is projected to increase in a warming climate. But whether the more available N is immobilized by microbes (thus stimulates soil carbon (C) decomposition), or is absorbed by plants (thus intensifies C uptake) remains unknown in the alpine meadow ecosystem. Infrared heaters were used to simulate climate warming with a paired experimental design. Soil ammonification, nitrification, and net mineralization were obtained by in situ incubation in a permafrost region of the Qinghai‐Tibet Plateau (QTP). Available N significantly increased due to the stimulation of net nitrification and mineralization in 0–30 cm soil layer. Microbes immobilized N in the end of growing season in both warming and control plots. The magnitude of immobilized N was lower in the warming plots. The root N concentration significantly reduced, but root N pool intensified due to the significant increase in root biomass in the warming treatment. Our results suggest that a warming‐induced increase in biomass is the major N sink and will continue to stimulate plant growth until plant N saturation, which could sustain the positive warming effect on ecosystem productivity. |
author2 |
National Natural Science Foundation of China Chinese Academy of Sciences |
format |
Article in Journal/Newspaper |
author |
Peng, Fei Xue, Xian You, Quangang Xu, Manhou Chen, Xiang Guo, Jian Wang, Tao |
spellingShingle |
Peng, Fei Xue, Xian You, Quangang Xu, Manhou Chen, Xiang Guo, Jian Wang, Tao Intensified plant N and C pool with more available nitrogen under experimental warming in an alpine meadow ecosystem |
author_facet |
Peng, Fei Xue, Xian You, Quangang Xu, Manhou Chen, Xiang Guo, Jian Wang, Tao |
author_sort |
Peng, Fei |
title |
Intensified plant N and C pool with more available nitrogen under experimental warming in an alpine meadow ecosystem |
title_short |
Intensified plant N and C pool with more available nitrogen under experimental warming in an alpine meadow ecosystem |
title_full |
Intensified plant N and C pool with more available nitrogen under experimental warming in an alpine meadow ecosystem |
title_fullStr |
Intensified plant N and C pool with more available nitrogen under experimental warming in an alpine meadow ecosystem |
title_full_unstemmed |
Intensified plant N and C pool with more available nitrogen under experimental warming in an alpine meadow ecosystem |
title_sort |
intensified plant n and c pool with more available nitrogen under experimental warming in an alpine meadow ecosystem |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1002/ece3.2583 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.2583 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.2583 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.2583 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Ecology and Evolution volume 6, issue 23, page 8546-8555 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.2583 |
container_title |
Ecology and Evolution |
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6 |
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23 |
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8546 |
op_container_end_page |
8555 |
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1810471566456127488 |