气候变化领域集成服务门户(CCPortal): Impacts of seasonal grazing on net ecosystem carbon exchange in alpine meadow on the Tibetan Plateau

CCPortal

DOI	10.1007/s11104-015-2602-6
	Impacts of seasonal grazing on net ecosystem carbon exchange in alpine meadow on the Tibetan Plateau
	Luo, Caiyun; Bao, Xiaoying; Wang, Shiping; Zhu, Xiaoxue; Cui, Shujuan; Zhang, Zhenhua; Xu, Burenbayin; Niu, Haishan; Zhao, Liang; Zhao, Xinquan
通讯作者	Wang, SP (通讯作者)
发表日期	2015
ISSN	0032-079X
EISSN	1573-5036
起始页码	381
结束页码	395
卷号	396 期号:1-2
英文摘要	Understanding the effect of grazing season on net ecosystem CO2 exchange (NEE) and its components is crucial to predict the feedback of grazing management to climate change. We estimated NEE, gross primary productivity (GPP) and ecosystem respiration (Re) under different seasonal grazing practices (i.e. no-grazing (NG), warm season grazing (WG) and cold season grazing (CG)) by sheep during the growing seasons from 2008 to 2012 on the Tibetan Plateau. Our results show that the impacts of seasonal grazing on daily GPP, Re and NEE in the alpine meadow ecosystem varied with sampling date and year. Compared with NG and CG, WG significantly reduced average seasonal NEE by 22.7 %, because grazing impact was exacerbated by drought in July in 2010. Soil temperature only explained 19-31 % of the variation in daily GPP, Re and NEE for all grazing treatments. The interannual variabilities of GPP, Re and NEE were mainly determined by root biomass and/or average soil temperature during the growing season. Our results suggest that although WG may decrease sequestration of CO2 under continuous drought conditions after grazing, it would have little impact on CO2 sequestration during the growing season under conditions of future warming with greater rainfall in alpine meadows on the Tibetan Plateau.
关键词	SOIL CO2 EFFLUX INTERANNUAL VARIABILITY SPECIES COMPOSITION DIOXIDE EXCHANGE MANAGEMENT GRASSLAND FLUXES TEMPERATURE BIOMASS STEPPE
英文关键词	Warm season grazing; Cold season grazing; GPP; Re and NEE; Alpine meadow; Tibetan Plateau
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:000367344500027
来源期刊	PLANT AND SOIL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258428
推荐引用方式 GB/T 7714	Luo, Caiyun,Bao, Xiaoying,Wang, Shiping,et al. Impacts of seasonal grazing on net ecosystem carbon exchange in alpine meadow on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2015,396(1-2).
APA	Luo, Caiyun.,Bao, Xiaoying.,Wang, Shiping.,Zhu, Xiaoxue.,Cui, Shujuan.,...&Zhao, Xinquan.(2015).Impacts of seasonal grazing on net ecosystem carbon exchange in alpine meadow on the Tibetan Plateau.PLANT AND SOIL,396(1-2).
MLA	Luo, Caiyun,et al."Impacts of seasonal grazing on net ecosystem carbon exchange in alpine meadow on the Tibetan Plateau".PLANT AND SOIL 396.1-2(2015).