Stability and asynchrony of local communities but less so diversity increase regional stability of Inner Mongolian grassland.
Stability and asynchrony of local communities but less so diversity increase regional stability of Inner Mongolian grassland.
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DOI：
10.7554/elife.74881
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发表时间：
2022-10-07
期刊：
影响因子：
7.7
通讯作者：
Schmid B
中科院分区：
文献类型：
--
作者：
Wang Y;Wang S;Zhao L;Liang C;Miao B;Zhang Q;Niu X;Ma W;Schmid B
由于目前局部尺度的研究在指导具有多种植物群落的整个区域的管理和保护决策方面通常是无效的，因此迫切需要将生态系统稳定性的知识扩展到更大的空间尺度。以内蒙古草原为研究对象，研究了植物生产力在空间尺度和组织层次上的稳定性，分析了优势种、物种多样性和气候因子对植物生产力的影响。我们发现，跨遥远地方社区的区域稳定性与当地社区的稳定性和非同步性有关。仅用优势种而不是全种动态解释区域稳定性几乎同样好。所有或唯一优势种的多样性对稳定性和同步性的影响相对较弱，而较低的平均降水量和较高的降水量变化通过降低种群稳定性和同步物种动态而破坏区域和局部群落的稳定。研究表明，在物种丰度高度不均匀的半干旱温带草地上，局部群落的稳定性和非同步性增加了区域群落的稳定性，而这些稳定性和非同步性更多地受气候而非物种多样性的影响。未来降水的减少和变化的增加可能会危及该地区为人类福祉提供生态系统服务的可持续提供。
Extending knowledge on ecosystem stability to larger spatial scales is urgently needed because present local-scale studies are generally ineffective in guiding management and conservation decisions of an entire region with diverse plant communities. We investigated stability of plant productivity across spatial scales and hierarchical levels of organization and analyzed impacts of dominant species, species diversity, and climatic factors using a multisite survey of Inner Mongolian grassland. We found that regional stability across distant local communities was related to stability and asynchrony of local communities. Using only dominant instead of all-species dynamics explained regional stability almost equally well. The diversity of all or only dominant species had comparatively weak effects on stability and synchrony, whereas a lower mean and higher variation of precipitation destabilized regional and local communities by reducing population stability and synchronizing species dynamics. We demonstrate that, for semi-arid temperate grassland with highly uneven species abundances, the stability of regional communities is increased by stability and asynchrony of local communities and these are more affected by climate rather than species diversity. Reduced amounts and increased variation of precipitation in the future may compromise the sustainable provision of ecosystem services to human well-being in this region.