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Whole-soil warming shifts species composition without affecting diversity,biomass and productivity of the plant community in an alpine meadow 被引量:1
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作者 Wenkuan Qin Ying Chen +6 位作者 Xudong Wang Hongyang Zhao Yanhui Hou Qiufang Zhang Xiaowei Guo Zhenhua Zhang Biao Zhu 《Fundamental Research》 CAS CSCD 2023年第2期160-169,共10页
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-Tib... 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. 展开更多
关键词 whole-soil-profile warming Compensatory interactions Legumes FORBS Qinghai-Tibetan Plateau
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