Stability response of alpine meadow communities to temperature and precipitation changes on the Northern Tibetan Plateau

作者：Chunyu Wang, Junbang Wang, Fawei Zhang, Yongsheng Yang, Fanglin Luo, Yingnian Li, Jiexia Li · 发表于：Ecology and Evolution · 年份：2022 · DOI：10.1002/ece3.8592 · 被引用次数：18 · 研究领域：Ecology and Vegetation Dynamics Studies、Peatlands and Wetlands Ecology、Rangeland and Wildlife Management

Biomass temporal stability plays a key role in maintaining sustainable ecosystem functions and services of grasslands, and climate change has exerted a profound impact on plant biomass. However, it remains unclear how the community biomass stability in alpine meadows responds to changes in some climate factors (e.g., temperature and precipitation). Long-term field aboveground biomass monitoring was conducted in four alpine meadows (Haiyan [HY], Henan [HN], Gande [GD], and Qumalai [QML]) on the Qinghai-Tibet Plateau. We found that climate factors and ecological factors together affected the community biomass stability and only the stability of HY had a significant decrease over the study period. The community biomass stability at each site was positively correlated with both the stability of the dominant functional group and functional groups asynchrony. The effect of dominant functional groups on community stability decreased with the increase of the effect of functional groups asynchrony on community stability and there may be a 'trade-off' relationship between the effects of these two factors on community stability. Climatic factors directly or indirectly affect community biomass stability by influencing the stability of the dominant functional group or functional groups asynchrony. Air temperature and precipitation indirectly affected the community stability of HY and HN, but air temperature in the growing season and nongrowing season had direct negative and direct positiv...