【摘要-土壤微生物群落|16S微生物多样性】群落构建过程的平衡影响中国东部农田土壤微生物群落物种共生

  • 2019-11-18 14:47:05
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英文题目:Balance between community assembly processes mediates species coexistence in agricultural soil microbiomes across eastern China

期刊名称:The ISME Journal                  IF:9.493
发表时间:2019.10.14                        DOI:10.1038/s41396-019-0522-9
相关产品:16S微生物多样性                 测序平台:Illumina HiSeq2500
样品来源:土壤
关键词:土壤菌群   网络分析


文献摘要:

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.

摘要翻译:

揭示群落构建与物种共存之间的联系对于理解生态系统多样性和功能至关重要,它是微生物生态学的基础,但鲜有研究。本文研究了中国东部不同生境和地区的相邻玉米(水不饱和)和水稻(水饱和)田间的土壤古菌、细菌和真菌的群落组成,并通过方差分解、零模型和中性群落模型分析高通量测序数据。研究证明,在玉米田中微生物群落组成受物种分类的影响大于受扩散限制的影响,但在水稻田中的影响程度较低。在玉米田土壤中,低纬度地区物种分类的相对重要性要高于高纬度地区,而水稻田土壤具有相反的趋势。相对于物种分类,当群落主要受扩散限制驱动时,微生物共生关联性往往更高。在低纬度地区,玉米田和水稻田土壤之间具有更高的菌群差异,这与相关性网络中负相关性的比例更高有关。实验结果表明,物种分类和扩散限制之间的平衡影响土壤微生物群落中的物种共生。这项研究加深了我们对微生物生态系统现代共存理论的理解。



重要结果展示:


图1 不同区域玉米和水稻田土壤中微生物β多样性差异和DDR(距离衰减关系)模式:低纬度地区的玉米田土壤的微生物β多样性显著高于高纬度地区,而水稻田土壤呈现相反的趋势;此外,所有生境中微生物群落的DDR均较弱


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