气候变化领域集成服务门户(CCPortal): Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau

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DOI	10.1016/j.agrformet.2011.01.009
	Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau
	Lin, Xingwu; Zhang, Zhenhua; Wang, Shiping; Hu, Yigang; Xu, Guangping; Luo, Caiyun; Chang, Xiaofeng; Duan, Jichuang; Lin, Qiaoyan; Xu, Burenbayin; Wang, Yanfen; Zhao, Xinquan; Xie, Zubin
通讯作者	Wang, SP (通讯作者)
发表日期	2011
ISSN	0168-1923
EISSN	1873-2240
起始页码	792
结束页码	802
卷号	151 期号:7
英文摘要	Intensive studies reveal that there is much uncertainty regarding how ecosystem and soil respiration will respond to warming and grazing, especially in the alpine meadow ecosystem. We conducted a first of its kind field-manipulative warming and grazing experiment in an alpine meadow on the Tibetan plateau to determine the effects of warming and grazing on ecosystem and soil respiration for 3-years, from 2006 to 2008. Generally, warming and grazing did not affect seasonal average ecosystem respiration (Re), and there was no interaction between grazing and warming. However, they significantly affected the Re early in the growing season and by the end of the growing season. Warming significantly increased seasonal average soil respiration (Rs) by 9.2%, whereas the difference mainly resulted from data gathered early in the growing season, before June 2007. Positive correlations between soil temperature and Re and Rs were observed, and soil temperature explained 63-83% of seasonal Re variations during the 3-year study and 19-34% of Rs variations in 2007. Seasonal Re in 2008 and Rs in 2007 were slightly negatively correlated to soil moisture, but interannual average Re decreased with a decrease in precipitation for all treatments. Warming and grazing reduced the Q(10) value of Re in 2007 and 2008 but did not affect the Q(10) value of Rs. The Q(10) values of Rs were much lower than the Q(10) values of Re in 2007. These results suggest that grazing may reduce the temperature sensitivity of Re and that Re was mainly controlled by soil temperature rather than moisture which varied with timescale in the alpine meadow. (C) 2011 Elsevier B.V. All rights reserved.
关键词	CARBON-DIOXIDE EXCHANGE MINIMUM TEMPERATURE TRENDS SOIL RESPIRATION CO2 EXCHANGE INTERANNUAL VARIABILITY TERRESTRIAL ECOSYSTEMS SPECIES RICHNESS CYCLE FEEDBACKS ORGANIC-CARBON PLANT BIOMASS
英文关键词	Warming; Grazing; Ecosystem respiration; Soil respiration; Alpine meadow; Soil temperature and moisture; Climate change; Tibetan plateau
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000291283300004
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
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/257881
推荐引用方式 GB/T 7714	Lin, Xingwu,Zhang, Zhenhua,Wang, Shiping,et al. Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau[J]. 中国科学院青藏高原研究所,2011,151(7).
APA	Lin, Xingwu.,Zhang, Zhenhua.,Wang, Shiping.,Hu, Yigang.,Xu, Guangping.,...&Xie, Zubin.(2011).Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau.AGRICULTURAL AND FOREST METEOROLOGY,151(7).
MLA	Lin, Xingwu,et al."Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau".AGRICULTURAL AND FOREST METEOROLOGY 151.7(2011).