Effects of water and nitrogen addition on ecosystem respiration across three types of steppe: The role of plant and microbial biomass

doi:10.1016/j.scitotenv.2017.11.119

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	Effects of water and nitrogen addition on ecosystem respiration across three types of steppe: The role of plant and microbial biomass
	Liu, Wei 1,2; Lu, Xiaotao 3; Xu, Wenfang 4,5; Shi, Huiqiu 2; Hou, Longyu 2; Li, Linghao 2; Yuan, Wenping 1
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018-04-01
卷号	619 页码:103-111
关键词	Ecosystem Respiration Nitrogen Deposition Precipitation Regime Regional Variation Semi-arid Grassland
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2017.11.119
英文摘要	Evaluating the regional variation of ecosystem respiration (R-eco) in its response to the changes of soil water and nitrogen (N) availability is crucial for fully understanding ecosystem carbon (C) exchange and its feedbacks to global changes. Here, we examined the responses of R-eco, plant community aboveground biomass (AB), microbial biomass carbon (MBC) and soil moisture (SM) to water and N addition, using intact soil monoliths from three different temperate steppes along a precipitation gradient, including meadow steppe, typical steppe, and desert steppe in northern China. We found that the meadow steppe held the highest value of R-eco. Water addition significantly enhanced R-eco while N addition had no effect on R-eco in all three ecosystems. The response of R-eco in the typical steppe was more sensitive than the other two ecosystems. The changes of plant community AB exhibited amuch stronger explanatory power than that of MBC for R-eco in the typical steppe. In contrast, MBC was the dominant factor explaining the variation of R-eco in the desert steppe and the meadow steppe. These findings contribute to our understanding of regional patterns of ecosystem C exchange under scenarios of global changes and highlight the importance of water availability in regulating ecosystem processes in temperate steppe grasslands. (c) 2017 Published by Elsevier B.V.
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000424144200012
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/109266]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
通讯作者	Li, Linghao; Yuan, Wenping
作者单位	1.Sun Yat Sen Univ, Sch Atmospher Sci, Ctr Monsoon & Environm Res, Guangzhou 510275, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110016, Liaoning, Peoples R China 4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Wei,Lu, Xiaotao,Xu, Wenfang,et al. Effects of water and nitrogen addition on ecosystem respiration across three types of steppe: The role of plant and microbial biomass[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,619:103-111.
APA	Liu, Wei.,Lu, Xiaotao.,Xu, Wenfang.,Shi, Huiqiu.,Hou, Longyu.,...&Yuan, Wenping.(2018).Effects of water and nitrogen addition on ecosystem respiration across three types of steppe: The role of plant and microbial biomass.SCIENCE OF THE TOTAL ENVIRONMENT,619,103-111.
MLA	Liu, Wei,et al."Effects of water and nitrogen addition on ecosystem respiration across three types of steppe: The role of plant and microbial biomass".SCIENCE OF THE TOTAL ENVIRONMENT 619(2018):103-111.