Impact of anthropogenic activities on the sediment microbial communities of Baiyangdian shallow lake |
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| Authors: | Wenjun Wang Yujun Yi Yufeng Yang Yang Zhou Shanghong Zhang Xuan Wang Zhifeng Yang |
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| Institution: | 1. State Key Laboratory of Water Environmental Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China;2. Ministry of Education Key Laboratory of Water and Sediment Science, School of Environment, Beijing Normal University, Beijing 100875, China;3. Renewable Energy School, North China Electric Power University, Beijing 102206, China;1. Department of River Engineering and Disaster Management, Faculty of Hydrology and Water Resources, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Viet Nam;2. Unité de Modélisation Mathématiques et Informatique des Systèmes Complexes (UMMISCO), JEAI WARM, IRD, Sorbonne Université, F-93143 Bondy, France;3. Department of Civil and Environmental Engineering, Faculty of Engineering, National University of Singapore, Singapore;1. Environmental Microbial Genomics, École Centrale de Lyon, Université de Lyon, Ecully, 69134 CEDEX, France;2. Environmental Biotechnology Laboratory, School of Biotechnology, KIIT University, Bhubaneswar, Odisha, 751024, India;3. Wetland Research and Training Center, Chilika Development Authority, Department of Forest and Environment, Government of Odisha, Bhubaneswar, 751014, India;4. ISARA, Department of Agroecology and Environment, Lyon, 23 rue Jean Baldassini 69364 LYON CEDEX 07, France;1. State Key Labratory of Water Environmental Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China;2. Ministry of Education Key Laboratory of Water and Sediment Science, School of Environment, Beijing Normal University, Beijing, 100875, China;3. Research Institute of Environmental Protection of Baoding City, Baoding, 071051, China |
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| Abstract: | Microorganisms are recognized as sensors of external disturbance in freshwater ecosystems.In this study,sediment samples from regions with strong human activity interference(four sites),moderate human activity interference(five sites) and minor human activity interference(five sites) in Baiyangdian Lake were collected;and their physiological and chemical properties and heavy metals contents were analyzed.The structures of bacterial and fungal communities were tested using 16 S ribosomal Ribonucleic Acid(rRNA) and Internal Transcribed Spacer 2(ITS2) high-throughput sequencing technologies.The results indicated that Proteobacteria was the most abundant bacterial phylum.Ascomycota,Basidiomycota and Ciliophora were the dominant phyla of fungi.Obvious differences of microbial genera among the three regions we re obse rved,especially fungal genera.With intensified disturbance by human activities,the Simpson and Shannon indices of bacteria significantly decreased.The fungal communities were clustered into three groups in accordance with the different human disturbance levels.The bacterial communities of sediment samples under moderate and minor human disturbance appeared similar,but different from those under strong human disturbance.Redundancy analysis indicated that zinc,total phosphorus,copper,and lead were the dominant factors that influenced the bacterial community.Nitrifiers and sulfate-reducing bacteria were influenced by pH,nitrate(NO3),and total nitrogen.The fungal community was significantly affected by total phosphorus.This study reveals that sediment microbial community structures among different regions of a shallow lake are mainly impacted by human activities. |
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| Keywords: | Bacterial community Fungal community Human activity interference Environmental factors |
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