Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau.
Responses of ecosystem carbon (C) fluxes to human disturbance and climatic warming will affect terrestrial ecosystem C storage and feedback to climate change. We conducted a manipulative experiment to investigate the effects of warming and clipping on soil respiration (Rs), ecosystem respiration (ER...
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ftdoajarticles:oai:doaj.org/article:d5163e00d5a84c7c9f039ac52468601c 2023-05-15T17:58:14+02:00 Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau. Fei Peng Quangang You Manhou Xu Jian Guo Tao Wang Xian Xue 2014-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0109319 https://doaj.org/article/d5163e00d5a84c7c9f039ac52468601c EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4188580?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0109319 https://doaj.org/article/d5163e00d5a84c7c9f039ac52468601c PLoS ONE, Vol 9, Iss 10, p e109319 (2014) Medicine R Science Q article 2014 ftdoajarticles https://doi.org/10.1371/journal.pone.0109319 2022-12-31T01:35:10Z Responses of ecosystem carbon (C) fluxes to human disturbance and climatic warming will affect terrestrial ecosystem C storage and feedback to climate change. We conducted a manipulative experiment to investigate the effects of warming and clipping on soil respiration (Rs), ecosystem respiration (ER), net ecosystem exchange (NEE) and gross ecosystem production (GEP) in an alpine meadow in a permafrost region during two hydrologically contrasting years (2012, with 29.9% higher precipitation than the long-term mean, and 2013, with 18.9% lower precipitation than the long-tem mean). Our results showed that GEP was higher than ER, leading to a net C sink (measured by NEE) over the two growing seasons. Warming significantly stimulated ecosystem C fluxes in 2012 but did not significantly affect these fluxes in 2013. On average, the warming-induced increase in GEP (1.49 µ mol m(-2) s(-1)) was higher than in ER (0.80 µ mol m(-2) s(-1)), resulting in an increase in NEE (0.70 µ mol m(-2) s(-1)). Clipping and its interaction with warming had no significant effects on C fluxes, whereas clipping significantly reduced aboveground biomass (AGB) by 51.5 g m(-2) in 2013. These results suggest the response of C fluxes to warming and clipping depends on hydrological variations. In the wet year, the warming treatment caused a reduction in water, but increases in soil temperature and AGB contributed to the positive response of ecosystem C fluxes to warming. In the dry year, the reduction in soil moisture, caused by warming, and the reduction in AGB, caused by clipping, were compensated by higher soil temperatures in warmed plots. Our findings highlight the importance of changes in soil moisture in mediating the responses of ecosystem C fluxes to climate warming in an alpine meadow ecosystem. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles PLoS ONE 9 10 e109319 |
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Medicine R Science Q |
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Medicine R Science Q Fei Peng Quangang You Manhou Xu Jian Guo Tao Wang Xian Xue Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau. |
topic_facet |
Medicine R Science Q |
description |
Responses of ecosystem carbon (C) fluxes to human disturbance and climatic warming will affect terrestrial ecosystem C storage and feedback to climate change. We conducted a manipulative experiment to investigate the effects of warming and clipping on soil respiration (Rs), ecosystem respiration (ER), net ecosystem exchange (NEE) and gross ecosystem production (GEP) in an alpine meadow in a permafrost region during two hydrologically contrasting years (2012, with 29.9% higher precipitation than the long-term mean, and 2013, with 18.9% lower precipitation than the long-tem mean). Our results showed that GEP was higher than ER, leading to a net C sink (measured by NEE) over the two growing seasons. Warming significantly stimulated ecosystem C fluxes in 2012 but did not significantly affect these fluxes in 2013. On average, the warming-induced increase in GEP (1.49 µ mol m(-2) s(-1)) was higher than in ER (0.80 µ mol m(-2) s(-1)), resulting in an increase in NEE (0.70 µ mol m(-2) s(-1)). Clipping and its interaction with warming had no significant effects on C fluxes, whereas clipping significantly reduced aboveground biomass (AGB) by 51.5 g m(-2) in 2013. These results suggest the response of C fluxes to warming and clipping depends on hydrological variations. In the wet year, the warming treatment caused a reduction in water, but increases in soil temperature and AGB contributed to the positive response of ecosystem C fluxes to warming. In the dry year, the reduction in soil moisture, caused by warming, and the reduction in AGB, caused by clipping, were compensated by higher soil temperatures in warmed plots. Our findings highlight the importance of changes in soil moisture in mediating the responses of ecosystem C fluxes to climate warming in an alpine meadow ecosystem. |
format |
Article in Journal/Newspaper |
author |
Fei Peng Quangang You Manhou Xu Jian Guo Tao Wang Xian Xue |
author_facet |
Fei Peng Quangang You Manhou Xu Jian Guo Tao Wang Xian Xue |
author_sort |
Fei Peng |
title |
Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau. |
title_short |
Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau. |
title_full |
Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau. |
title_fullStr |
Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau. |
title_full_unstemmed |
Effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the Qinghai-Tibet Plateau. |
title_sort |
effects of warming and clipping on ecosystem carbon fluxes across two hydrologically contrasting years in an alpine meadow of the qinghai-tibet plateau. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pone.0109319 https://doaj.org/article/d5163e00d5a84c7c9f039ac52468601c |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
PLoS ONE, Vol 9, Iss 10, p e109319 (2014) |
op_relation |
http://europepmc.org/articles/PMC4188580?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0109319 https://doaj.org/article/d5163e00d5a84c7c9f039ac52468601c |
op_doi |
https://doi.org/10.1371/journal.pone.0109319 |
container_title |
PLoS ONE |
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9 |
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10 |
container_start_page |
e109319 |
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1766166794903486464 |