Whole-soil warming shifts species composition without affecting diversity,biomass and productivity of the plant community in an alpine meadow  

作　　者：Wenkuan Qin Ying Chen Xudong Wang Hongyang Zhao Yanhui Hou Qiufang Zhang Xiaowei Guo Zhenhua Zhang Biao Zhu 

机构地区：[1]Institute of Ecology,College of Urban and Environmental Sciences,and Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking University,Beijing 100871,China [2]Qinghai Haibei National Field Research Station of Alpine Grassland Ecosystem,and Key Laboratory of Adaptation and Evolution of Plateau Biota,Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810001,China

出　　处：《Fundamental Research》2023年第2期160-169,共10页自然科学基础研究（英文版）

基　　金：supported by the National Natural Science Foundation of China (42141006,31971528 and 31988102).

摘　　要：The structure and function of plant communities in alpine meadow ecosystems are potentially susceptible to climate warming.Here,we utilized a unique field manipulation experiment in an alpine meadow on the Qinghai-Tibetan Plateau and investigated the responses of plant species diversity,composition,biomass,and net primary productivity(NPP)at both community and functional group levels to whole-soil-profile warming(3–4℃ across 0–100 cm)during 2018–2021.Plant species diversity,biomass and NPP(both above-and belowground)at the community level showed remarkable resistance to warming.However,plant community composition gradually shifted over time.Over the whole experimental warming period,aboveground biomass of legumes significantly decreased by 45%.Conversely,warming significantly stimulated aboveground biomass of forbs by 84%,likely because of better growth and competitive advantages from the warming-induced stimulation of soil water and other variables.However,warming showed minor effects on aboveground biomass of grasses and sedges.Overall,we emphasize that experimental warming may significantly affect plant community composition in a short term by triggering adjustments in plant interspecific competition or survival strategies,which may cause potential changes in plant productivity over a more extended period and lead to changes in carbon source-sink dynamics in the alpine meadow ecosystem.

关 键 词：Whole-soil-profile warming Compensatory interactions Legumes FORBS Qinghai-Tibetan Plateau 

分 类 号：Q94[生物学—植物学]