Mechanisms of soil bacterial and fungal community assembly differ among and within islands
Mechanisms of soil bacterial and fungal community assembly differ among and within islands
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DOI：
10.1111/1462-2920.14864
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发表时间：
2019-12-02
影响因子：
5.1
通讯作者：
Jiang, Lin
中科院分区：
文献类型：
--
作者：
Wang, Pandeng;Li, Shao-Peng;Jiang, Lin
对岛屿的研究对进化和生态理论的发展作出了重大贡献。然而，我们对岛屿上的微生物群落聚集知之甚少。利用29个湖泊岛屿和邻近大陆的土壤微生物数据，研究了岛屿间和岛屿内土壤细菌和真菌群落的组装机制。我们发现确定性过程，特别是同质选择，在塑造岛屿间土壤细菌群落的组装中往往更重要，而随机过程往往在岛屿内更重要。此外，岛屿面积的增加增加了岛屿内土壤细菌群落的同质选择的重要性，但降低了变量选择的重要性。而岛屿间和岛屿内的土壤真菌群落聚集则倾向于随机过程，岛屿内的扩散限制比岛屿间的扩散限制更重要。研究结果表明，岛屿土壤微生物群落的规模依赖性和分类依赖性，表明在评价生境破碎化对土壤微生物群落的影响时，应明确考虑空间尺度。
The study of islands has made substantial contributions to the development of evolutionary and ecological theory. However, we know little about microbial community assembly on islands. Using soil microbial data collected from 29 lake islands and nearby mainland, we examined the assembly mechanisms of soil bacterial and fungal communities among and within islands. We found that deterministic processes, especially homogeneous selection, tended to be more important in shaping the assembly of soil bacterial communities among islands, while stochastic processes tended to be more important within islands. Moreover, increasing island area increased the importance of homogeneous selection, but reduced the importance of variable selection, for soil bacterial community assembly within islands. By contrast, stochastic processes tended to dominate soil fungal community assembly both among and within islands, with dispersal limitation playing a more important role within than among islands. Our results highlight the scale- and taxon-dependence of insular soil microbial community assembly, suggesting that spatial scale should be explicitly considered when evaluating the influences of habitat fragmentation on soil microbial communities.