气候变化领域集成服务门户(CCPortal): Grazing effect on growing season ecosystem respiration and its temperature sensitivity in alpine grasslands along a large altitudinal gradient on the central Tibetan Plateau

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DOI	10.1016/j.agrformet.2015.12.005
	Grazing effect on growing season ecosystem respiration and its temperature sensitivity in alpine grasslands along a large altitudinal gradient on the central Tibetan Plateau
	Zhao, Jingxue; Luo, Tianxiang; Li, Ruicheng; Li, Xiang; Tian, Lihua
通讯作者	Luo, TX (通讯作者)
发表日期	2016
ISSN	0168-1923
EISSN	1873-2240
起始页码	114
结束页码	121
卷号	218
英文摘要	Little is known about how livestock grazing could modify altitudinal trends in seasonal ecosystem respiration (Re) and its temperature sensitivity (Q(10)). We aim to test the hypotheses that the altitudinal grazing effect on growing-season Re is well correlated with the grazing-induced change of plant biomass, and grazing exclusion tends to reduce the Q(10) of Re along altitudes. We conducted a 7-year altitudinal grazing exclusion experiment across lower and upper limits of alpine meadows (4400-5100 m) on the central Tibetan Plateau. Plant biomass, Re and related environmental factors were observed across fenced and grazed treatments at each of 6 altitudes during the growing seasons of 2012-2013. The stimulations of above- and belowground biomass due to grazing exclusion decreased with increasing altitude, which were positively correlated with the change of Re. The Q(10) of seasonal Re generally increased with increasing altitude, but tended to decrease under grazing exclusion. Soil organic carbon did not have a direct effect on the altitudinal variation of Re. Our data supported the hypotheses, suggesting that plant biomass change could be served as an integrated indicator for spatiotemporal variations of Re. Grazing exclusion might be a promising measure to reduce the temperature sensitivity of Re. (C) 2015 Elsevier B.V. All rights reserved.
关键词	SOIL RESPIRATION CO2 EXCHANGE TERRESTRIAL ECOSYSTEMS CARBON STORAGE CLIMATE-CHANGE MEADOW RESPONSES FEEDBACKS IMPACTS WATER
英文关键词	Alpine grassland; Ecosystem respiration; Grazing; Temperature sensitivity; 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:000370905100011
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/258718
推荐引用方式 GB/T 7714	Zhao, Jingxue,Luo, Tianxiang,Li, Ruicheng,et al. Grazing effect on growing season ecosystem respiration and its temperature sensitivity in alpine grasslands along a large altitudinal gradient on the central Tibetan Plateau[J]. 中国科学院青藏高原研究所,2016,218.
APA	Zhao, Jingxue,Luo, Tianxiang,Li, Ruicheng,Li, Xiang,&Tian, Lihua.(2016).Grazing effect on growing season ecosystem respiration and its temperature sensitivity in alpine grasslands along a large altitudinal gradient on the central Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,218.
MLA	Zhao, Jingxue,et al."Grazing effect on growing season ecosystem respiration and its temperature sensitivity in alpine grasslands along a large altitudinal gradient on the central Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 218(2016).