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	Plant functional trait diversity regulates the nonlinear response of productivity to regional climate change in Tibetan alpine grasslands
	Wu J. S.; Wurst, S.; Zhang, X. Z.
	2016
关键词	rain-use efficiency water-use efficiency grazing-exclusion precipitation gradient aboveground biomass ecosystem multifunctionality altitudinal gradient biotic interactions northern tibet plateau
英文摘要	The biodiversity-productivity relationship is still under debate for alpine grasslands on the Tibetan Plateau. We know little about direct and indirect effects of biotic and abiotic drivers on this relationship, especially in regard to plant functional trait diversity. Here, we examine how aboveground net primary productivity (ANPP) and precipitation use efficiency (PUE) respond to climate, soil and community structure across alpine grasslands on the Northern Tibetan Plateau. We found that both ANPP and PUE showed nonlinear patterns along water availability and site altitude variation, which together accounted for 80.3% and 68.8% of variation in ANPP and PUE, respectively, by optimal generalized additive models. Functional trait divergence (FTD) and community weighted mean (CWM) of plant functional traits were as important as plant species diversity (PSD) for explaining the nonlinear productivity-climate relationship. These findings were confirmed by results from principal component analyses and structural equation models. We also found that FTD was negatively correlated with PSD across different alpine grasslands. Our results implicate: first, the combinatorial influences of temperature and precipitation gradients are important for predicting alpine grassland dynamics; second, the convergence and divergence of plant functional traits may have the potential to elucidate the effect of plant diversity on ecosystem functionality.
出处	Scientific Reports
卷	6
语种	英语
ISSN号	2045-2322
DOI标识	10.1038/srep35649
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/42812]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Wu J. S.,Wurst, S.,Zhang, X. Z.. Plant functional trait diversity regulates the nonlinear response of productivity to regional climate change in Tibetan alpine grasslands. 2016.

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