Key Laboratory of Applied Marine Biotechnology, School of Marine Science, Ministry of Education, Ningbo University, Ningbo 315832, China; Ningbo Institute of Oceanography, Ningbo 315832, China.
Key Laboratory of Applied Marine Biotechnology, School of Marine Science, Ministry of Education, Ningbo University, Ningbo 315832, China.
Mar Environ Res. 2020 Sep;160:105010. doi: 10.1016/j.marenvres.2020.105010. Epub 2020 May 16.
The underlying mechanisms of bacterioplankton community assembly and interspecies interactions during harmful algal blooms remain largely unclear. Using 16S rRNA gene amplicon sequencing, we analyzed the bacterioplankton communities over the continuous course of saxitoxin-producing Gymnodinium catenatum blooms and two diatom (i.e., Skeletonema costatum and Chaetoceros curvisetus) blooms in an anthropogenically controlled and eutrophic bay, East China Sea. The succession of bacterioplankton communities correlated with changes in the dynamics of algal species. Deterministic versus stochastic bacterioplankton community assemblage processes were quantified, demonstrating that stochastic processes increased when algal blooms happened. The occurrence of algal blooms caused weaker bacterioplankton interspecies interactions and higher degrees of cooperative activities, changed keystone taxa and diminished the stability of bacterial communities. These findings consequently have important implications for our understanding of bacterioplankton community ecology during algal blooms.
在赤潮期间，细菌浮游生物群落组装和种间相互作用的潜在机制在很大程度上仍不清楚。本研究采用 16S rRNA 基因扩增子测序，分析了东海一个人为控制的富营养化海湾中甲藻（即具齿原甲藻和旋链角毛藻）赤潮和产麻痹性贝类毒素的亚历山大藻赤潮连续发生过程中的细菌浮游生物群落。细菌浮游生物群落的演替与藻类物种动态变化相关。通过定量分析确定性和随机的细菌浮游生物群落组装过程，表明当藻类赤潮发生时，随机过程增加。藻类赤潮的发生导致细菌浮游生物种间相互作用减弱，合作活动增加，改变了关键分类群，并降低了细菌群落的稳定性。这些发现对于我们理解藻类赤潮期间细菌浮游生物群落生态学具有重要意义。
