Interaction and assembly processes of abundant and rare microbial communities during a diatom bloom process
Interaction and assembly processes of abundant and rare microbial communities during a diatom bloom process
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硅藻华过程中丰富和稀有微生物群落的相互作用和组装过程
DOI：
10.1111/1462-2920.14820
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发表时间：
2020
影响因子：
5.1
通讯作者：
Xiangyu Zhu
中科院分区：
文献类型：
--
作者：
Huajun Zhang;Fanrong Hou;Weijuan Xie;Kai Wang;Xiaoyan Zhou;Demin Zhang;Xiangyu Zhu
硅藻水华对微生物群落的动态变化具有重要影响，但目前对水华过程中丰富类群和稀有类群之间的相互作用和聚集机制知之甚少。本文利用16 S rRNA基因扩增测序技术，对象山港早春硅藻水华期间丰富和稀有微生物群落的共现模式和组装过程进行了研究。结果表明，稀有亚群落的α多样性指数显著高于丰富亚群落和普通亚群落。3个亚群落中，RS的β-多样性最高，物种周转是引起3个亚群落β-多样性变化的主要原因，RS的β-多样性也最高。微生物群落的组装主要是由中性过程驱动的，但中性过程在各亚群落中的作用可能有所不同。共现网络分析表明，丰富和共同的操作分类单位往往位于网络的中心位置。由于中肋骨条藻的演替，网络中的大多数模块都是特定于特定的水华阶段的。总之，这些发现扩展了目前对有害藻华干扰下海洋环境中微生物相互作用和组装机制的理解。
Diatom blooms can significantly influence the dynamics of microbial communities, yet little is known about the interaction and assembly mechanisms of abundant and rare taxa during bloom process. Here, using 16S rRNA gene amplicon sequencing, we investigated the co‐occurrence patterns and assembly processes of abundant and rare microbial communities during an early spring diatom bloom in Xiangshan bay. Our results showed that α‐diversity indices in the rare subcommunity (RS) were significantly higher than those in the abundant and common subcommunities. β‐Diversity of the RS was the highest among three subcommunities, and the variation of β‐diversity in the three subcommunities was mainly induced by species turnover, which was also the highest in the RS. The assembly of microbial communities was mainly driven by the neutral processes, but the roles of neutral processes might differ in each subcommunity. Co‐occurrence network analysis revealed that abundant and common operational taxonomic units were more often located in central positions within the network. Most of the modules in the network were specific to a particular bloom stage, owing to the succession ofSkeletonema costatum. Overall, these findings expand current understanding of the microbial interaction and assembly mechanisms in marine environment suffering harmful algal bloom disturbance.