Biotic stability mechanisms in Inner Mongolian grassland
Biotic stability mechanisms in Inner Mongolian grassland
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DOI：
10.1098/rspb.2020.0675
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发表时间：
2020-06
期刊：
影响因子：
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通讯作者：
Yonghui Wang;Xiaxia Niu;Liqing Zhao;C. Liang;Bailing Miao;Qing Zhang;Jinghui Zhang;B. Schmid
中科院分区：
文献类型：
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作者：
Yonghui Wang;Xiaxia Niu;Liqing Zhao;C. Liang;Bailing Miao;Qing Zhang;Jinghui Zhang;B. Schmid
在理论和实验研究中，与物种多样性相关的生物机制有望稳定群落，但在环境变化较大的自然群落中可能难以发现。我们调查了内蒙古草原的多站点研究的生物稳定性机制，其特点是大的空间变化的物种丰富度和组成和降水的时间波动。我们使用了一种新的添加剂分配方法来分离的物种同步性和种群动态的社区内到不同的物种多度组。群落稳定性与物种丰富度无关，但受物种同步性和种群动态的调节，特别是丰富物种。降水量的波动使群落内的种群动态同步，降低了它们的稳定性。我们的研究结果表明，在自然生态系统中的生物稳定性机制的一般性，并建议，在不断变化的环境中的社区稳定性的准确预测不均匀的物种组成应考虑分区稳定机制到不同的物种丰度组。
Biotic mechanisms associated with species diversity are expected to stabilize communities in theoretical and experimental studies but may be difficult to detect in natural communities exposed to large environmental variation. We investigated biotic stability mechanisms in a multi-site study across Inner Mongolian grassland characterized by large spatial variations in species richness and composition and temporal fluctuations in precipitation. We used a new additive-partitioning method to separate species synchrony and population dynamics within communities into different species-abundance groups. Community stability was independent of species richness but was regulated by species synchrony and population dynamics, especially of abundant species. Precipitation fluctuations synchronized population dynamics within communities, reducing their stability. Our results indicate generality of biotic stability mechanisms in natural ecosystems and suggest that for accurate predictions of community stability in changing environments uneven species composition should be considered by partitioning stabilizing mechanisms into different species-abundance groups.