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Antibiotic resistance genes in surface water of eutrophic urban lakes are related to heavy metals, antibiotics, lake morphology and anthropic impact

文献类型： 外文期刊

作者： Yang, Yuyi 1 ; Xu, Chen 1 ; Cao, Xinhua 1 ; Lin, Hui 3 ; Wang, Jun 1 ;

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

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

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

4.Chinese Acad Sci, Sinoafrica Joint Res Ctr, Wuhan 430074, Peoples R China

关键词： Urban lakes;Antibiotic resistance genes (ARGs);Heavy metals;Antibiotics;Redundancy analysis

期刊名称：ECOTOXICOLOGY （ 影响因子：2.823； 五年影响因子：2.958 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Urban lakes are impacted by heavy human activities and represent potential reservoirs for antibiotic resistance genes. In this study, six urban lakes in Wuhan, central China were selected to analyze the distribution of sulfonamide resistance (sul) genes, tetracycline resistance (tet) genes and quinolone resistance (qnr) genes and their relationship with heavy metals, antibiotics, lake morphology and anthropic impact. sul1 and sul2 were detected in all six lakes and dominated the types of antibiotic resistance genes, which accounted for 86.28-97.79% of the total antibiotic resistance gene abundance. For eight tested tet genes, antibiotic efflux pumps (tetA, tetB, tetC, and tetG) genes were all observed in six lakes and had higher relative abundance than ribosomal protection protein genes (tetM and tetQ). For 4 plasmid mediated quinolone resistance genes, only qnrD is found in all six lakes. The class I integron (intI1) is also found to be a very important media for antibiotic resistance gene propagation in urban lakes. The results of redundancy analysis and variation partitioning analysis showed that antibiotic and co-selection with heavy metals were the major factors driving the propagation of antibiotic resistance genes in six urban lakes. The heavily eutrophic Nanhu Lake and Shahu Lake which located in a high density building area with heavy human activities had the higher relative abundance of total antibiotic resistance genes. Our study could provide a useful reference for antibiotic resistance gene abundance in urban lakes with high anthropic impact.

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