首页|Climate change filtered out resource-acquisitive plants in a temperate grassland in Inner Mongolia,China
Climate change filtered out resource-acquisitive plants in a temperate grassland in Inner Mongolia,China
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Global climate change has led to the decline of species and functional diversity in ecosystems,changing community composition and ecosystem functions.However,we still know little about how species with different resource-use strategies(different types of resource usage and plant growth of plants as indicated by the spectrum of plant economic traits,including acquisitive resource-use strategy and con-servative resource-use strategy)would change in response to climate change,and how the changes in the diversity of species with different resource-use strategies may influence community-level productivity.Here,using long-term(1982-2017)observatory data in a temperate grassland in Inner Mongolia,we investigated how climate change had affected the species richness(SR)and functional richness(FRic)for the whole community and for species with different resource-use strategies.Specifically,based on data for four traits representing leaf economics spectrum(leaf carbon concentration,leaf nitrogen concentration,leaf phosphorus concentration,and specific leaf area),we divided 81 plant species appearing in the grassland community into three plant functional types representing resource-acquisitive,medium,and resource-conservative species.We then analyzed the changes in community-level productivity in response to the decline of SR and FRic at the community level and for different resource-use strategies.We found that community-level SR and FRic decreased with drying climate,which was largely driven by the decline of diversity for resource-acquisitive species.However,community-level productivity remained stable because resource-conservative species dominating this grassland were barely affected by climate change.Our study revealed distinctive responses of species with different resource-use strategies to climate change and provided a new approach based on species functional traits for predicting the magnitude and direction of climate change effects on ecosystem functions.
Heying Jing、Xingshuo Xiong、Feng Jiang、Xucai Pu、Wenhong Ma、Daijiang Li、Zhongling Liu、Zhiheng Wang
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Institute of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education,College of Urban and Environmental Sciences,Peking University,Beijing 100871,China
Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau,School of Ecology and Environment,Inner Mongolia University,Hohhot 010021,China
Department of Biological Sciences,Louisiana State University,Baton Rouge,LA 70803,USA
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research Development Program of ChinaStrategic Priority Research Program of Chinese Academy of Sciences
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