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Mixing regime shapes the community assembly process, microbial interaction and proliferation of cyanobacterial species Planktothrix in a stratified lake
混合制度塑造了分层湖中蓝藻物种浮游丝菌的群落组装过程,微生物相互作用和增殖
混合体制は、群集の集合プロセス、微生物の相互作用、および層状湖におけるシアノバクテリア種Planktothrixの増殖を形成します
혼합 체제는 계층화된 호수에서 시아노박테리아 종 Planktothrix의 커뮤니티 조립 과정, 미생물 상호 작용 및 증식을 형성합니다.
El régimen de mezcla da forma al proceso de ensamblaje de la comunidad, la interacción microbiana y la proliferación de las especies de cianobacterias Planktothrix en un lago estratificado
Le régime de mélange façonne le processus d'assemblage de la communauté, l'interaction microbienne et la prolifération des espèces cyanobactériennes Planktothrix dans un lac stratifié
Режим смешивания определяет процесс сборки сообщества, микробное взаимодействие и размножение цианобактерий Planktothrix в стратифицированном озере.
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
Journal of Environmental Sciences, 2 August 2021
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.
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