Nearly a decade‐long repeatable seasonal diversity patterns of bacterioplankton communities in the eutrophic Lake Donghu (Wuhan,China) |
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| Authors: | Qingyun Yan James C Stegen Yuhe Yu Ye Deng Xinghao Li Shu Wu Lili Dai Xiang Zhang Jinjin Li Chun Wang Jiajia Ni Xuemei Li Hongjuan Hu Fanshu Xiao Weisong Feng Daliang Ning Zhili He Joy D Van Nostrand Liyou Wu Jizhong Zhou |
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| Institution: | 1. Environmental Microbiome Research Center and the School of Environmental Science and Engineering, Sun Yat‐sen University, Guangzhou, China;2. Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China;3. Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA;4. CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco‐Environmental Sciences, Chinese Academy of Sciences, Beijing, China;5. Department of Microbiology and Plant Biology, Institute for Environmental Genomics, University of Oklahoma, Norman, OK, USA;6. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China;7. Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA |
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| Abstract: | Uncovering which environmental factors govern community diversity patterns and how ecological processes drive community turnover are key questions related to understand the community assembly. However, the ecological mechanisms regulating long‐term variations of bacterioplankton communities in lake ecosystems remain poorly understood. Here we present nearly a decade‐long study of bacterioplankton communities from the eutrophic Lake Donghu (Wuhan, China) using 16S rRNA gene amplicon sequencing with MiSeq platform. We found strong repeatable seasonal diversity patterns in terms of both common (detected in more than 50% samples) and dominant (relative abundance >1%) bacterial taxa turnover. Moreover, community composition tracked the seasonal temperature gradient, indicating that temperature is a key environmental factor controlling observed diversity patterns. Total phosphorus also contributed significantly to the seasonal shifts in bacterioplankton composition. However, any spatial pattern of bacterioplankton communities across the main lake areas within season was overwhelmed by their temporal variabilities. Phylogenetic analysis further indicated that 75%–82% of community turnover was governed by homogeneous selection due to consistent environmental conditions within seasons, suggesting that the microbial communities in Lake Donghu are mainly controlled by niche‐based processes. Therefore, dominant niches available within seasons might be occupied by similar combinations of bacterial taxa with modest dispersal rates throughout different lake areas. |
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| Keywords: | community assembly homogeneous selection lake bacterioplankton Lake Donghu repeatable diversity patterns |
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