CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.
University of Chinese Academy of Sciences, Beijing, China.
Environ Microbiol Rep. 2021 Jun;13(3):294-308. doi: 10.1111/1758-2229.12929. Epub 2021 Feb 1.
Marine microbes play important roles in the development of phytoplankton blooms. The diversity and composition of free living (FL) and particle attached (PA) microbial communities have been well studied, while little is known about their geographic and co-occurrence patterns, especially during the subsiding process of Phaeocystis globosa blooms. Herein, the beta-diversity of FL and PA microbial communities in both the surface and bottom layers of different habitats were comprehensively examined during succession of a P. globosa bloom event. The results showed that microbial communities from bloom and non-bloom sites exhibited distinct community compositions. Among the different sampling sites, the community similarities decreased with spatial distance, in which the FL communities' similarity in bottom waters was more influenced by spatial variation. The variation of microbial communities was mostly attributed to environmental selection, spatial distance, and the abundance of P. globosa successively. The co-occurrence networks of microbial communities in bloom and non-bloom waters differed in terms of structure and composition, and the bloom network had more links and closer relationships between genera than the non-bloom network. The correlation among genera and modules suggested that the bloom microbes were likely driven by high environmental selection and low competitive effect between each other.
海洋微生物在浮游植物爆发的发展中发挥着重要作用。自由生活（FL）和颗粒附着（PA）微生物群落的多样性和组成已经得到了很好的研究，而它们的地理和共存模式知之甚少，特别是在球形棕囊藻（Phaeocystis globosa）爆发消退过程中。在此，在球形棕囊藻爆发事件的演替过程中，综合研究了不同生境中表层和底层 FL 和 PA 微生物群落的β多样性。结果表明，来自爆发和非爆发地点的微生物群落表现出明显不同的群落组成。在不同的采样地点中，群落相似性随空间距离的增加而降低，其中底层水的 FL 群落相似性受空间变化的影响更大。微生物群落的变化主要归因于环境选择、空间距离和球形棕囊藻丰度的依次变化。爆发和非爆发水域中微生物群落的共生网络在结构和组成上存在差异，爆发网络比非爆发网络具有更多的联系和更紧密的属间关系。属间的相关性和模块表明，爆发中的微生物可能受到高环境选择和相互间低竞争效应的驱动。
