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- Title
Heavy Metal Pollution and Its Effect on Microbial Community Structure in Sediments of Different Entrances of Lake.
- Authors
ZHU Xiaojie; HUANG Jian; WANG Jinhua; XI Shanshan; ZHANG Hua; ZHANG Jiamei; HE Chunhua; LIU Hailin
- Abstract
Using Illumina high-throughput sequencing technology, the effects of heavy metal pollution on microbial community structure in the sediments of Hangbu River, Paihe River and Nanfei River intakes in the western half of Chaohu Lake Basin were analyzed. The results showed that Zn, Pb, Cr, Ni and Cd at the entrance of the Hangbu River were significantly higher than those at the entrance of the South Feihe River and the Paihe River (P<0.05), and Cd was moderately polluted at the entrance of the Hangbu River, posing a large ecological risk. The comprehensive potential pollution risk of heavy metals in the sediments of the three entrance lakes was low. In Chaohu Lake, Proteobacteria, Acidobacteriota, Bacteroidota and Chloroflexi are the main bacteria groups entering the three lake inlets. Proteobacteria, Acidobacteriota and Nitrospirota are high in the entrance of the lake from the Hangzhou River. The analysis of microbial-diversity showed that the diversity and richness of the entering estuary of Hangbu River was higher than that of Nanfei River and Paihe River. Redundancy analysis showed that the heavy metal content in the three lake intakes was strongly negatively correlated with most microorganisms, such as Bacteroidota and Chloroflexi, while positively correlated with some other bacteria, such as Myxococcota, Acidobacteriota and Nitrospirota. The sampling points and heavy metal redundancy analysis diagram show that heavy metals have a great influence on the sediment samples at the inlet of the lake. This study can provide a biological strategy for assessing the ecological stress of heavy metals and in situ bioremediation of heavy metal polluted sediments at different intakes of Chaohu Lake.
- Subjects
HANGZHOU (China); ECOLOGICAL risk assessment; HEAVY metal toxicology; MICROBIAL communities; ANALYSIS of heavy metals; IN situ bioremediation; RIVER sediments
- Publication
Environmental Science & Technology (10036504), 2023, Vol 46, Issue 6, p25
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.2749.22.338