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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, 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; Luo, TX
Source PublicationAGRICULTURAL AND FOREST METEOROLOGY
2016
Volume218Issue:0Pages:114-121
DOI10.1016/j.agrformet.2015.12.005
AbstractLittle 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.
Subject Area自然地理学
WOS IDWOS:000370905100011
Language英语
Indexed BySCI
KeywordSoil Respiration Climate-change Co2 Exchange Terrestrial Ecosystems Carbon Storage Meadow Responses China Decomposition Feedbacks
Cooperation Status国内
Department环境
SubtypeArticle
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Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/7733
Collection图书馆
Corresponding AuthorLuo, TX
Affiliation1.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
GB/T 7714
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.
APA Zhao, JX ,Luo, TX ,Li, RC ,Li, X ,Tian, LH ,&Luo, TX.(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(0),114-121.
MLA Zhao, JX ,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 218.0(2016):114-121.
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