Effects of fish and arsenic on bacterial communities in lake water and sediment
Lake ecosystems are thought as an important reservoir of aquatic biodiversity,lake arsenic contamination is a growing concern for global safety and health.However,the combined effect of arsenic and fish disturbance on microbial communities in water and sediments are rarely reported.Herein,a microcosm experiment was used to explore the alteration of bacterial communities of lake water and sediment under fish activity and/or arsenic using Illumina sequencing analysis.The results showed that bacterial diversity in sediments was significantly higher than that in water and fish.Both fish and arsenic could cause changes in bacterial communities in water and sediments.In addition,co-exposure to arsenic and fish decreased significantly the bacterial diversity in sediments,also reduce observably the relative abundance of Flavobacterium and Rhodobacter in water.Our findings broaden the current scientific knowledge of the microbial communities in lake and sediment ecosystems,and provide scientific basis for ecological risk study under the combined effects of pollutants and biological disturbance.
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