Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow
Information regarding the interactive effects of global warming and increasing nitrogen (N) deposition on CO2 emissions in the alpine grassland ecosystem is scarce, especially in the permafrost region of the Qinghai-Tibetan Plateau. We conducted a manipulative field experiment in an alpine swamp mea...
Published in: | European Journal of Soil Biology |
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ftchinacadscimhe:oai:ir.imde.ac.cn:131551/26433 2023-05-15T17:57:38+02:00 Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow Bai, Wei Wang, Genxu Xi, Jingyang Liu, Yongwan Yin, Pengsong 2019-05-01 http://ir.imde.ac.cn/handle/131551/26433 https://doi.org/10.1016/j.ejsobi.2019.04.003 英语 eng ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER EUROPEAN JOURNAL OF SOIL BIOLOGY http://ir.imde.ac.cn/handle/131551/26433 doi:10.1016/j.ejsobi.2019.04.003 Warming Nitrogen addition Ecosystem respiration Alpine swamp meadow Qinghai-Tibetan plateau SOIL RESPIRATION CLIMATE-CHANGE CARBON-CYCLE MICROBIAL BIOMASS PLANT-PRODUCTION CO2 TEMPERATURE PLATEAU EMISSION IMPACTS Environmental Sciences & Ecology Agriculture Ecology Soil Science 期刊论文 2019 ftchinacadscimhe https://doi.org/10.1016/j.ejsobi.2019.04.003 2022-12-19T18:21:14Z Information regarding the interactive effects of global warming and increasing nitrogen (N) deposition on CO2 emissions in the alpine grassland ecosystem is scarce, especially in the permafrost region of the Qinghai-Tibetan Plateau. We conducted a manipulative field experiment in an alpine swamp meadow to investigate the responses of ecosystem respiration (ER) to simulated warming and N addition. Results showed that the interaction between warming and N addition significantly increased ER by 41.3-239.6%, which might be related to the enhancements in plant autotrophic respiration and soil microbial biomass and activity. The correlations between ER and a single hydrothermic factor tended to be weakened with the increasing complexity of the treatment method. The drought stress on CO2 emissions was not found due to the thawing of the permafrost and the upward diffusion of soil moisture, thus air temperature combined with soil temperature explained 80% of the ER fluctuations. Meanwhile, warming increased the aboveground biomass (AGB) and belowground biomass (BGB) by 44.2-68.1% and 48.1-82.6%, respectively, suggesting that more biomass was allocated to the belowground components. N addition increased AGB by 21.2-30.3%, while there was no significant effect on BGB. Warming combined with N addition strongly increased AGB and BGB by 52.0-159.5% and 59.0-102.1%, respectively. These results indicated that plant production and allocation pattern might also be important factors affecting CO2 emissions. In addition, warming alone and warming combined with N addition increased soil microbial biomass carbon (MBC) by 19.1-90.7% and 28.1-80.4%, respectively, and the enhancement in soil microbial biomass and activity might promote the release of soil carbon. Report permafrost IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) European Journal of Soil Biology 92 16 23 |
institution |
Open Polar |
collection |
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences) |
op_collection_id |
ftchinacadscimhe |
language |
English |
topic |
Warming Nitrogen addition Ecosystem respiration Alpine swamp meadow Qinghai-Tibetan plateau SOIL RESPIRATION CLIMATE-CHANGE CARBON-CYCLE MICROBIAL BIOMASS PLANT-PRODUCTION CO2 TEMPERATURE PLATEAU EMISSION IMPACTS Environmental Sciences & Ecology Agriculture Ecology Soil Science |
spellingShingle |
Warming Nitrogen addition Ecosystem respiration Alpine swamp meadow Qinghai-Tibetan plateau SOIL RESPIRATION CLIMATE-CHANGE CARBON-CYCLE MICROBIAL BIOMASS PLANT-PRODUCTION CO2 TEMPERATURE PLATEAU EMISSION IMPACTS Environmental Sciences & Ecology Agriculture Ecology Soil Science Bai, Wei Wang, Genxu Xi, Jingyang Liu, Yongwan Yin, Pengsong Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow |
topic_facet |
Warming Nitrogen addition Ecosystem respiration Alpine swamp meadow Qinghai-Tibetan plateau SOIL RESPIRATION CLIMATE-CHANGE CARBON-CYCLE MICROBIAL BIOMASS PLANT-PRODUCTION CO2 TEMPERATURE PLATEAU EMISSION IMPACTS Environmental Sciences & Ecology Agriculture Ecology Soil Science |
description |
Information regarding the interactive effects of global warming and increasing nitrogen (N) deposition on CO2 emissions in the alpine grassland ecosystem is scarce, especially in the permafrost region of the Qinghai-Tibetan Plateau. We conducted a manipulative field experiment in an alpine swamp meadow to investigate the responses of ecosystem respiration (ER) to simulated warming and N addition. Results showed that the interaction between warming and N addition significantly increased ER by 41.3-239.6%, which might be related to the enhancements in plant autotrophic respiration and soil microbial biomass and activity. The correlations between ER and a single hydrothermic factor tended to be weakened with the increasing complexity of the treatment method. The drought stress on CO2 emissions was not found due to the thawing of the permafrost and the upward diffusion of soil moisture, thus air temperature combined with soil temperature explained 80% of the ER fluctuations. Meanwhile, warming increased the aboveground biomass (AGB) and belowground biomass (BGB) by 44.2-68.1% and 48.1-82.6%, respectively, suggesting that more biomass was allocated to the belowground components. N addition increased AGB by 21.2-30.3%, while there was no significant effect on BGB. Warming combined with N addition strongly increased AGB and BGB by 52.0-159.5% and 59.0-102.1%, respectively. These results indicated that plant production and allocation pattern might also be important factors affecting CO2 emissions. In addition, warming alone and warming combined with N addition increased soil microbial biomass carbon (MBC) by 19.1-90.7% and 28.1-80.4%, respectively, and the enhancement in soil microbial biomass and activity might promote the release of soil carbon. |
format |
Report |
author |
Bai, Wei Wang, Genxu Xi, Jingyang Liu, Yongwan Yin, Pengsong |
author_facet |
Bai, Wei Wang, Genxu Xi, Jingyang Liu, Yongwan Yin, Pengsong |
author_sort |
Bai, Wei |
title |
Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow |
title_short |
Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow |
title_full |
Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow |
title_fullStr |
Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow |
title_full_unstemmed |
Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow |
title_sort |
short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow |
publisher |
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER |
publishDate |
2019 |
url |
http://ir.imde.ac.cn/handle/131551/26433 https://doi.org/10.1016/j.ejsobi.2019.04.003 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
EUROPEAN JOURNAL OF SOIL BIOLOGY http://ir.imde.ac.cn/handle/131551/26433 doi:10.1016/j.ejsobi.2019.04.003 |
op_doi |
https://doi.org/10.1016/j.ejsobi.2019.04.003 |
container_title |
European Journal of Soil Biology |
container_volume |
92 |
container_start_page |
16 |
op_container_end_page |
23 |
_version_ |
1766166110605934592 |