Warming Changed Soil Respiration Dynamics of Alpine Meadow Ecosystem on the Tibetan Plateau
Alpine meadow system underlain by permafrost on the Tibetan Plateau contains vast soil organic carbon and is sensitive to global warming. However, the dynamics of annual soil respiration (Rs) under long-term warming and the determined factors are still not very clear. Using opentop chambers (OTC), w...
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ftbilinugalpubl:oai:ojs.pkp.sfu.ca:article/511 2023-05-15T17:57:22+02:00 Warming Changed Soil Respiration Dynamics of Alpine Meadow Ecosystem on the Tibetan Plateau Wang, Junfeng Yuan, Ziqiang Wu, Qingbai Rafique, Rashad 2019-09-30 application/pdf https://journals.bilpubgroup.com/index.php/jees/article/view/511 eng eng BILINGUAL PUBLISHING GROUP https://journals.bilpubgroup.com/index.php/jees/article/view/511/906 https://journals.bilpubgroup.com/index.php/jees/article/view/511 Copyright (c) 2019 Author(s) https://creativecommons.org/licenses/by-nc/4.0 Journal of Environmental & Earth Sciences; Vol. 1 , No. 2 (October 2019); 7-17 2661-3190 Soil respiration Alpine meadow Experimental warming Open-top chamber info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftbilinugalpubl 2023-03-14T18:46:40Z Alpine meadow system underlain by permafrost on the Tibetan Plateau contains vast soil organic carbon and is sensitive to global warming. However, the dynamics of annual soil respiration (Rs) under long-term warming and the determined factors are still not very clear. Using opentop chambers (OTC), we assessed the effects of two-year experimental warming on the soil CO2 emission and the Q10 value (temperature sensitivity coefficient) under different warming magnitudes. Our study showed that the soil CO2 efflux rate in the warmed plots were 1.22 and 2.32 times higher compared to that of controlled plots. However, the Q10 value decreased by 45.06% and 50.34% respectively as the warming magnitude increased. These results suggested that soil moisture decreasing under global warming would enhance soil CO2 emission and lower the temperature sensitivity of soil respiration rate of the alpine meadow ecosystem in the permafrost region on the Tibetan Plateau. Thus, it is necessary to take into account the combined effect of ground surface warming and soil moisture decrease on the Rs in order to comprehensively evaluate the carbon emissions of the alpine meadow ecosystem, especially in short and medium terms. Article in Journal/Newspaper permafrost Bilingual Publishing Co. (BPC): E-Journals |
institution |
Open Polar |
collection |
Bilingual Publishing Co. (BPC): E-Journals |
op_collection_id |
ftbilinugalpubl |
language |
English |
topic |
Soil respiration Alpine meadow Experimental warming Open-top chamber |
spellingShingle |
Soil respiration Alpine meadow Experimental warming Open-top chamber Wang, Junfeng Yuan, Ziqiang Wu, Qingbai Rafique, Rashad Warming Changed Soil Respiration Dynamics of Alpine Meadow Ecosystem on the Tibetan Plateau |
topic_facet |
Soil respiration Alpine meadow Experimental warming Open-top chamber |
description |
Alpine meadow system underlain by permafrost on the Tibetan Plateau contains vast soil organic carbon and is sensitive to global warming. However, the dynamics of annual soil respiration (Rs) under long-term warming and the determined factors are still not very clear. Using opentop chambers (OTC), we assessed the effects of two-year experimental warming on the soil CO2 emission and the Q10 value (temperature sensitivity coefficient) under different warming magnitudes. Our study showed that the soil CO2 efflux rate in the warmed plots were 1.22 and 2.32 times higher compared to that of controlled plots. However, the Q10 value decreased by 45.06% and 50.34% respectively as the warming magnitude increased. These results suggested that soil moisture decreasing under global warming would enhance soil CO2 emission and lower the temperature sensitivity of soil respiration rate of the alpine meadow ecosystem in the permafrost region on the Tibetan Plateau. Thus, it is necessary to take into account the combined effect of ground surface warming and soil moisture decrease on the Rs in order to comprehensively evaluate the carbon emissions of the alpine meadow ecosystem, especially in short and medium terms. |
format |
Article in Journal/Newspaper |
author |
Wang, Junfeng Yuan, Ziqiang Wu, Qingbai Rafique, Rashad |
author_facet |
Wang, Junfeng Yuan, Ziqiang Wu, Qingbai Rafique, Rashad |
author_sort |
Wang, Junfeng |
title |
Warming Changed Soil Respiration Dynamics of Alpine Meadow Ecosystem on the Tibetan Plateau |
title_short |
Warming Changed Soil Respiration Dynamics of Alpine Meadow Ecosystem on the Tibetan Plateau |
title_full |
Warming Changed Soil Respiration Dynamics of Alpine Meadow Ecosystem on the Tibetan Plateau |
title_fullStr |
Warming Changed Soil Respiration Dynamics of Alpine Meadow Ecosystem on the Tibetan Plateau |
title_full_unstemmed |
Warming Changed Soil Respiration Dynamics of Alpine Meadow Ecosystem on the Tibetan Plateau |
title_sort |
warming changed soil respiration dynamics of alpine meadow ecosystem on the tibetan plateau |
publisher |
BILINGUAL PUBLISHING GROUP |
publishDate |
2019 |
url |
https://journals.bilpubgroup.com/index.php/jees/article/view/511 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Journal of Environmental & Earth Sciences; Vol. 1 , No. 2 (October 2019); 7-17 2661-3190 |
op_relation |
https://journals.bilpubgroup.com/index.php/jees/article/view/511/906 https://journals.bilpubgroup.com/index.php/jees/article/view/511 |
op_rights |
Copyright (c) 2019 Author(s) https://creativecommons.org/licenses/by-nc/4.0 |
_version_ |
1766165784970657792 |