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Nitrogen rather than phosphorus driving the biogeographic patterns of abundant bacterial taxa in a eutrophic plateau lake

文献类型： 外文期刊

作者： Zhang, Weihong 1 ; Wan, Wenjie 1 ; Lin, Hui 4 ; Pan, Xiong 5 ; Lin, Li 5 ; Yang, Yuyi 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China

2.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Wuhan 430074, Peoples R China

3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

4.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizers, Hangzhou 310021, Peoples R China

5.Changjiang River Sci Res Inst, Basin Water Environm Res Dept, Wuhan 430014, Peoples R China

关键词： Eutrophic plateau lake; Co-occurrence patterns; Assembly process; Biogeographic distribution; Functional redundancy

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）

ISSN： 0048-9697

年卷期： 2022 年 806 卷

页码：

收录情况： SCI

摘要： Eutrophication of freshwater lakes is an important cause of global water pollution. In this study, the composition and biogeographic distribution of both abundant and rare sedimentary bacterial taxa and their relationship with nutrients were assessed in Erhai Lake, a subtropical plateau lake. Proteobacteria (48.3%) and Nitrospirae (11.7%) dominated the composition of abundant taxa, while the rare taxa were dominated by Proteobacteria (25.8%) and Chloroflexi (14.1%). The abundant bacterial taxa had strong energy metabolism, whereas the rare bacterial taxa had strong xenobiotics biodegradation and metabolism. These results indicated different compositions and functions existed between abundant and rare taxa. Total nitrogen (TN) was the most influential factor shaping the biogeographic patterns of both abundant and rare taxa. Phosphorus was not the deterministic factor, although nitrogen and phosphorus were the main contributors to eutrophication. Total organic carbon and pH also contributed to the biogeographic patterns of both abundant and rare taxa. In the eutrophic plateau lake sediments, abundant taxa, rather than rare taxa, played a dominant role in maintaining the community structure and ecological function of the bacterial community. The TN gradient was an important factor that affected the biogeographic distribution and assembly processes of abundant taxa. This study sheds light on the role of TN in shaping the biogeographic distribution and assembly processes of abundant taxa in eutrophic lakes. (c) 2021 Elsevier B.V. All rights reserved.

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