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Profiling the antibiotic resistome in soils between pristine and human-affected sites on the Tibetan Plateau

Journal of Environmental Sciences 2022年第1期34卷 442-451页

作者： Hang Wang Xiaoxuan Su Jianqiang Su Yongguan Zhu Kai Ding Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Yunnan Key Laboratory of Plateau Wetland Conservation Restoration and Ecological ServicesSouthwest Forestry UniversityKunming 650224China National Plateau Wetlands Research Center Southwest Forestry UniversityKunming 650224China

With increasing pressure from anthropogenic activity in pristine environments,the comprehensive profiling of antibiotic resistance genes(ARGs)is essential to evaluate the potential risks from human-induced antibiotic resistance in these under-studied ***,we characterized the microbial resistome in relatively pristine soil samples collected from four distinct habitats on the Tibetan Plateau,using a Smart chip based high-throughput q PCR *** compared these to soils from the same habitats that had been subjected to various anthropogenic activities,including residential sewage discharge,animal farming,atmospheric deposition,and tourism *** to pristine samples,an average of23.7%more ARGs were detected in the human-affected soils,and the ARGs enriched in these soils mainly encoded resistances to aminoglycoside and *** the four habitats studied,soils subjected to animal farming showed the highest risks of ARG enrichment and *** shown,the number of ARGs enriched(a total of 42),their fold changes(17.6 fold on average),and the co-occurrence complexity between ARGs and mobile genetic elements were all the highest in fecal-polluted *** well as antibiotics themselves,heavy metals also influenced ARG distributional patterns in Tibetan ***,compared to urban areas,the Tibetan Plateau had a low potential for ARG selection and exhibited low carriage of ARGs by mobile genetic elements,even in environments impacted by humans,suggesting that these ARGs have a limited capacity to *** present study examined the effects of multiple anthropogenic activities on the soil resistomes in relatively pristine environments.

关键词： Antibiotic resistance gene resistome risk Tibetan plateau Animal farming Anthropogenic activity

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