Li Nan, Zhao Huaxian, Jiang Gonglingxia, Xu Qiangsheng, Tang Jinli, Li Xiaoli, Wen Jiemei, Liu Huimin, Tang Chaowu, Dong Ke, Kang Zhenjun
Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education, Nanning Normal University, Nanning, China.
Department of Biological Sciences, Kyonggi University, Suwon-si, South Korea.
Front Microbiol. 2020 Jul 16;11:1624. doi: 10.3389/fmicb.2020.01624. eCollection 2020.
blooms are recognized as playing an essential role in shaping the structure of the marine community and its functions in marine ecosystems. In this study, we observed variation in the alpha diversity and composition of marine free-living bacteria during blooms and identified key microbial community assembly patterns during the blooms. The results showed that the Shannon index was higher before the blooming of in the subtropical bay. (γ-proteobacteria), (α-proteobacteria), and (Cytophagales) were defined as the most important genera, and they were more correlated with environmental factors at the terminal stage of blooms. Furthermore, different community assembly processes were observed. Both the mean nearest relatedness index (NRI) and nearest taxon index (NTI) revealed the dominance of deterministic factors in the non-blooming and blooming periods of , while the bacterial communities in marine waters after the blooms tended to be controlled by stochastic factors. Our findings revealed that the assembly of the bacterial community in marine blooms is a complex process with mixture effects of marine microbiomes and environmental parameters.
水华被认为在塑造海洋群落结构及其在海洋生态系统中的功能方面发挥着重要作用。在本研究中，我们观察了水华期间海洋自由生活细菌的α多样性和组成的变化，并确定了水华期间关键的微生物群落组装模式。结果表明，在亚热带海湾水华爆发前，香农指数较高。（γ-变形菌纲）、（α-变形菌纲）和（噬纤维菌目）被定义为最重要的属，并且它们在水华末期与环境因素的相关性更强。此外，还观察到了不同的群落组装过程。平均最近亲缘指数（NRI）和最近分类单元指数（NTI）均表明，在水华的非爆发期和爆发期，确定性因素占主导地位，而水华后海水中的细菌群落则倾向于受随机因素控制。我们的研究结果表明，海洋水华期间细菌群落的组装是一个复杂的过程，受到海洋微生物群落和环境参数的混合影响。
