IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow
Bai, Wei1; Wang, Genxu2; Xi, Jingyang1; Liu, Yongwan1; Yin, Pengsong1
Corresponding AuthorBai, Wei(baiwei915@163.com)
2019-05-01
Source PublicationEUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN1164-5563
Volume92Pages:16-23
AbstractInformation 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.
KeywordWarming Nitrogen addition Ecosystem respiration Alpine swamp meadow Qinghai-Tibetan plateau
DOI10.1016/j.ejsobi.2019.04.003
Indexed BySCI
WOS KeywordSOIL RESPIRATION ; CLIMATE-CHANGE ; CARBON-CYCLE ; MICROBIAL BIOMASS ; PLANT-PRODUCTION ; CO2 ; TEMPERATURE ; PLATEAU ; EMISSION ; IMPACTS
Language英语
Funding ProjectNational Natural Science Foundation of China[41563005] ; National Natural Science Foundation of China[41271224] ; Young Scholars Science Foundation of Lanzhou Jiaotong University[2015013]
WOS Research AreaEnvironmental Sciences & Ecology ; Agriculture
WOS SubjectEcology ; Soil Science
WOS IDWOS:000469158800003
Funding OrganizationNational Natural Science Foundation of China ; Young Scholars Science Foundation of Lanzhou Jiaotong University
PublisherELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26232
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorBai, Wei
Affiliation1.Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Lanzhou 730070, Gansu, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Bai, Wei,Wang, Genxu,Xi, Jingyang,et al. Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2019,92:16-23.
APA Bai, Wei,Wang, Genxu,Xi, Jingyang,Liu, Yongwan,&Yin, Pengsong.(2019).Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow.EUROPEAN JOURNAL OF SOIL BIOLOGY,92,16-23.
MLA Bai, Wei,et al."Short-term responses of ecosystem respiration to warming and nitrogen addition in an alpine swamp meadow".EUROPEAN JOURNAL OF SOIL BIOLOGY 92(2019):16-23.
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