Plant coverage is more sensitive than species diversity in indicating the dynamics of the above-ground biomass along a precipitation gradient on the Tibetan Plateau

doi:10.1016/j.ecolind.2017.09.013

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Plant coverage is more sensitive than species diversity in indicating the dynamics of the above-ground biomass along a precipitation gradient on the Tibetan Plateau
	Qin, Xiaojing 1,3; Sun, Jian 2; Wang, Xiaodan1
刊名	ECOLOGICAL INDICATORS
	2018
卷号	84 页码:507-514
关键词	Above-ground biomass Plant coverage Species diversity Community stability Precipitation gradient
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2017.09.013
英文摘要	Species diversity (SD) and total plant coverage (PC) are commonly used predictors of primary productivity (i.e., above ground biomass (ABG)). PC is a characteristic frequently used in remote sensing to assess land cover, land use, and vegetative condition, while species diversity serves as a measure of the existence and utilization of ecological niches. Both SD and PC are thought to be positively related to primary productivity, with SD further contributing to community stability. We investigate the effects of SD and PC on ABG under different mean annual precipitation (MAP) levels. The influences of SD and PC on community stability and biomass allocation were analyzed using redundancy analysis (RDA), correlation analysis (CA), and generalized linear models (GLM). Significantly positive relationships between precipitation and above-ground biomass, species diversity, and plant coverage occurred in the low rainfall gradient (100-400 mm/y) in the alpine steppes, while these relationships appeared in the high rainfall gradient (500-700 mm/y) in alpine meadow ecosystems. Second, we determined that plant coverage (r(2) = 0.88, P < 0.001) provided a better explanation for above-ground biomass than species diversity (r(2) = 0.67, P < 0.001). Moreover, we found that the relationships between SD and AGB and PC and AGB (r(2) = 0.52, P < 0.001, and r(2) = 0.85, P < 0.001, respectively) were more positive in the alpine steppes than in the alpine meadows (r(2) = 0.41, P < 0.001, and r(2) = 0.77, P < 0.001, respectively). Third, at the different precipitation gradients, especially at the 400-500 mm/y and > 600 mm/y ranges, the PC continued to increase, while SD decreased with increasing AGB. Moreover, SD was more sensitive to community stability and reproduction allocation than PC. Overall, plant coverage is better than species diversity in indicating the dynamics of above-ground biomass along a precipitation gradient.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000425828200052
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/20681]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Sun, Jian; Wang, Xiaodan
作者单位	1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 640016, Sichuan, Peoples R China 2.Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Key Lab Ecosyst Network Observat & Modelling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Qin, Xiaojing,Sun, Jian,Wang, Xiaodan. Plant coverage is more sensitive than species diversity in indicating the dynamics of the above-ground biomass along a precipitation gradient on the Tibetan Plateau[J]. ECOLOGICAL INDICATORS,2018,84:507-514.
APA	Qin, Xiaojing,Sun, Jian,&Wang, Xiaodan.(2018).Plant coverage is more sensitive than species diversity in indicating the dynamics of the above-ground biomass along a precipitation gradient on the Tibetan Plateau.ECOLOGICAL INDICATORS,84,507-514.
MLA	Qin, Xiaojing,et al."Plant coverage is more sensitive than species diversity in indicating the dynamics of the above-ground biomass along a precipitation gradient on the Tibetan Plateau".ECOLOGICAL INDICATORS 84(2018):507-514.