气候变化领域集成服务门户(CCPortal): Responses of ecosystem respiration, methane uptake and nitrous oxide emission to drought in a temperate desert steppe

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DOI	10.1007/s11104-021-05183-6
	Responses of ecosystem respiration, methane uptake and nitrous oxide emission to drought in a temperate desert steppe
	Yue, Ping; Zuo, Xiaoan; Li, Kaihui; Li, Xiangyun; Wang, Shaokun; Ma, Xujun; Qu, Hao; Chen, Min; Liu, Liangxu; Misselbrook, Tom; Yu, Qiang
通讯作者	Zuo, XA (通讯作者)，Key Lab Stress Physiol & Ecol Cold & Arid Reg, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	0032-079X
EISSN	1573-5036
起始页码	409
结束页码	421
卷号	469 期号:1-2
英文摘要	Aims Drought significantly impacts ecosystem structure and function, especially the transformation rates of soil carbon and nitrogen. This study explores how drought affects ecosystem respiration (R-e), methane (CH4) uptake and nitrous oxide (N2O) emissions in temperate desert steppes and the underlying mechanisms. Methods An in-situ experiment was conducted in the Inner Mongolia desert steppe in northern China to study the effect of drought on R-e, CH4 and N2O fluxes. Structural equation modeling (SEM) was used to establish the relationship between R-e, CH4 uptake and N2O emissions and plant functional traits and environmental factors. Results Ecosystem respiration and CH4 uptake were both significantly reduced by chronic drought (66 % precipitation reduction from 1 May to 31 August) but not by pulse drought (100 % precipitation reduction in June and July). In contrast, no significant impact on N2O emissions was observed under chronic or pulse drought. There were no significant direct effects of soil moisture on R-e, CH4 uptake or N2O emissions. However, soil moisture had an important indirect effect on R-e, CH4 uptake and N2O emissions, mainly through its influence on plant functional traits, plant above-ground biomass and soil nutrients. Plant biomass and soil temperature were the key indicators of R-e, and plant leaf nitrogen content was the key plant trait associated with N2O emissions. In contrast, plant specific leaf area and biomass were the key traits associated with CH4 uptake. Conclusions Overall, R-e and CH4 uptake were reduced by chronic drought in this desert steppe, but there was no significant effect on N2O emissions. Ecosystem respiration, CH4 uptake and N2O emissions were associated with plant functional traits. This provides new insight for the understanding of soil carbon and nitrogen dynamics in desert steppe systems under drought conditions and an important theoretical basis for the revision of model parameters.
关键词	PLANT FUNCTIONAL TRAITS SOIL RESPIRATION SPECIES COMPOSITION EXTREME DROUGHT INNER-MONGOLIA N2O EMISSIONS FLUXES CO2 OXIDATION FOREST
英文关键词	Chronic drought; Pulse drought; Ecosystem respiration; Methane uptake; Nitrous oxide emission; Desert steppe
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:000707678600001
来源期刊	PLANT AND SOIL
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254187
作者单位	[Yue, Ping] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China; [Yue, Ping; Zuo, Xiaoan; Li, Xiangyun; Wang, Shaokun; Ma, Xujun; Qu, Hao; Chen, Min; Liu, Liangxu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Urat Desert Grassland Res Stn, Lanzhou 730000, Peoples R China; [Yue, Ping; Zuo, Xiaoan; Li, Xiangyun; Wang, Shaokun; Ma, Xujun; Qu, Hao; Chen, Min; Liu, Liangxu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Naiman Desertificat Res Stn, Lanzhou 730000, Peoples R China; [Yue, Ping; Zuo, Xiaoan] Key Lab Stress Physiol & Ecol Cold & Arid Reg, Lanzhou 730000, Gansu, Peoples R China; [Li, Kaihui] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Misselbrook, Tom] Rothamsted Res, Northwyke EX20 2SB, Devon, England; [Yu, Qiang] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Pe...
推荐引用方式 GB/T 7714	Yue, Ping,Zuo, Xiaoan,Li, Kaihui,et al. Responses of ecosystem respiration, methane uptake and nitrous oxide emission to drought in a temperate desert steppe[J]. 中国科学院西北生态环境资源研究院,2021,469(1-2).
APA	Yue, Ping.,Zuo, Xiaoan.,Li, Kaihui.,Li, Xiangyun.,Wang, Shaokun.,...&Yu, Qiang.(2021).Responses of ecosystem respiration, methane uptake and nitrous oxide emission to drought in a temperate desert steppe.PLANT AND SOIL,469(1-2).
MLA	Yue, Ping,et al."Responses of ecosystem respiration, methane uptake and nitrous oxide emission to drought in a temperate desert steppe".PLANT AND SOIL 469.1-2(2021).