Year
Month
(Peer-Reviewed) Mixing regime shapes the community assembly process, microbial interaction and proliferation of cyanobacterial species Planktothrix in a stratified lake
Chen Junwen 陈俊文 ¹, Liu Huacong 刘桦聪 ², Bai Yaohui 柏耀辉 ², Qi Jing 戚菁 ², Qi Weixiao 齐维晓 ¹, Liu Huijuan 刘会娟 ¹, Peng Jianfeng 彭剑峰 ¹, Qu Jiuhui 曲久辉 ¹ ²
¹ Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
中国 北京 清华大学环境学院 环境模拟与污染控制国家重点联合实验室 水质与水生态研究中心
² Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
中国 北京 中国科学院生态环境研究中心 饮用水科学与技术重点实验室
Abstract

Lake mixing influences aquatic chemical properties and microbial community composition, and thus, we hypothesized that it would alter microbial community assembly and interaction. To clarify this issue, we explored the community assembly processes and cooccurrence networks in four seasons at two depths (epilimnion and hypolimnion) in a mesotrophic and stratified lake (Chenghai Lake), which formed stratification in the summer and turnover in the winter.

During the stratification period, the epilimnion and hypolimnion went through contrary assembly processes but converged to similar assembly patterns in the mixing period. In a highly homogeneous selection environment, species with low niche breadth were filtered, resulting in decreased species richness. Water mixing in the winter homogenized the environment, resulting in a simpler microbial cooccurrence network. Interestingly, we observed a high abundance of the cyanobacterial genus Planktothrix in the winter, probably due to nutrient redistribution and Planktothrix adaptivity to the winter environment in which mixing played important roles.

Our study provides deeper fundamental insights into how environmental factors influence microbial community structure through community assembly processes.
Mixing regime shapes the community assembly process, microbial interaction and proliferation of cyanobacterial species Planktothrix in a stratified lake_1
Mixing regime shapes the community assembly process, microbial interaction and proliferation of cyanobacterial species Planktothrix in a stratified lake_2
Mixing regime shapes the community assembly process, microbial interaction and proliferation of cyanobacterial species Planktothrix in a stratified lake_3
Mixing regime shapes the community assembly process, microbial interaction and proliferation of cyanobacterial species Planktothrix in a stratified lake_4
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