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学科主题: 地理学::自然地理学
题名: Grazing effect on growing season ecosystem respiration and its temperature sensitivity in alpine grasslands along a large altitudinal gradient on the central Tibetan Plateau
作者: Zhao, JX (Zhao, Jingxue)1, 2; Luo, TX (Luo, Tianxiang)1; Li, RC (Li, Ruicheng)2; Li, X (Li, Xiang)1; Tian, LH (Tian, Lihua)3
通讯作者: Luo, TX
刊名: AGRICULTURAL AND FOREST METEOROLOGY
发表日期: 2016
DOI: 10.1016/j.agrformet.2015.12.005
卷: 218, 期:0, 页:114-121
收录类别: SCI
合作性质: 国内
文章类型: Article
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.
语种: 英语
WOS记录号: WOS:000370905100011
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7733
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Bldg 3,16 Lin Cui Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Southwest Univ Nationalities, Inst Qinghai Tibetan Plateau, Chengdu 610041, Peoples R China

Recommended Citation:
Zhao, JX ,Luo, TX ,Li, RC ,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]. AGRICULTURAL AND FOREST METEOROLOGY,2016,218(0):114-121.
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