Balance between community assembly processes mediates species coexistence in agricultural soil microbiomes across eastern China
Balance between community assembly processes mediates species coexistence in agricultural soil microbiomes across eastern China
复制标题
DOI：
10.1038/s41396-019-0522-9
复制
发表时间：
2020-01-01
期刊：
影响因子：
11
通讯作者：
Lu, Yahai
中科院分区：
文献类型：
--
作者：
Jiao, Shuo;Yang, Yunfeng;Lu, Yahai
揭示群落组合与物种共存之间的联系对理解生态系统多样性和功能至关重要，是微生物生态学中一个基本但很少研究的课题。在这里，我们研究了中国东部不同生境和地区的玉米（不饱和水）和水稻（饱和水）相邻对的古细菌、细菌和真菌群落。采用变异划分、零模型和中性群落模型分析高通量测序数据集。结果表明，玉米田的微生物群落聚集更多地受物种分选而不是扩散限制的支配，而稻田的微生物群落聚集在较小程度上受物种分选的支配。玉米土壤中物种分选的相对重要性在低纬度地区大于高纬度地区，而水稻土壤则表现出相反的趋势。相对于物种分选，当群落主要受扩散限制驱动时，微生物共现关联倾向于更高。低纬度地区玉米和水稻土壤的群落差异较大，这与相关网络中负边比例较高是一致的。结果表明，物种分选和限制扩散之间的平衡调节了土壤微生物群落中物种的共存。本研究增强了我们对当代微生物生态系统共存理论的理解。
Revealing the linkages between community assembly and species coexistence, which is crucial for the understanding of ecosystem diversity and functioning, is a fundamental but rarely investigated subject in microbial ecology. Here we examined archaeal, bacterial, and fungal community assembly in adjacent pairs of maize (water-unsaturated) and rice (water-saturated) fields across different habitats and regions throughout Eastern China. The high-throughput sequencing dataset was analyzed by variation partitioning, null model, and neutral community model analyses. We demonstrated that microbial community assembly was governed more by species sorting than by dispersal limitation in maize fields, and to a lesser extent in rice fields. The relative importance of species sorting in maize soils was greater at low latitudes than at high latitudes, while rice soils exhibited an opposite trend. Microbial co-occurrence associations tended to be higher when communities were primarily driven by dispersal limitation relative to species sorting. There were greater community dissimilarities between maize and rice soils in low-latitude regions, which was consistent with the higher proportion of negative edges in the correlation networks. The results indicate that a balance between species sorting and dispersal limitation mediates species coexistence in soil microbiomes. This study enhances our understanding of contemporary coexistence theory in microbial ecosystems.