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

来源 :环境科学学报(英文版) | 被引量 : 0次 | 上传用户:wuyoucao654321
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
With increasing pressure from anthropogenic activity in pristine environments,the com-prehensive profiling of antibiotic resistance genes (ARGs) is essential to evaluate the poten-tial risks from human-induced antibiotic resistance in these under-studied places.Here,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 qPCR approach.We 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 activity.Compared to pristine samples,an average of 23.7% more ARGs were detected in the human-affected soils,and the ARGs enriched in these soils mainly encoded resistances to aminoglycoside and beta-lactam.Of the four habitats studied,soils subjected to animal farming showed the highest risks of ARG enrichment and dissemination.As 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 soils.As well as antibiotics themselves,heavy metals also influenced ARG distributional patterns in Tibetan environments.However,com-pared to urban areas,the Tibetan Plateau had a low potential for ARG selection and exhib-ited low carriage of ARGs by mobile genetic elements,even in environments impacted by humans,suggesting that these ARGs have a limited capacity to disseminate.The present study examined the effects of multiple anthropogenic activities on the soil resistomes in relatively pristine environments.
其他文献
Recently,metal-based carbon materials have been verified to be an effective persulfate acti-vator,but secondary pollution caused by metal leaching is inevitable.Hence,a green metal-free 3D macroscopic N-doped porous carbon nanosheets (NPCN) was synthesize
Anaerobic digestion and incineration are widely used sewage sludge (SS) treatment and dis-posal approaches to recovering energy from SS,but it is difficult to select a suitable technical process from the various technologies.In this study,life-cycle asses
Two anaerobic membrane bioreactors (AnMBRs) equipped with different membrane pore size (0.4 or 0.05 μm) were operated at 25℃ and fed with domestic wastewater.The hydraulic retention time (HRT) of the reactors was shortened.The microbial communities of the
This study analyzed the function of different glutathione S-transferase (GST) isoforms and detoxification metabolism responses in Manila clam,Ruditapes philippinarum,exposed to 4 kinds of polycyclic aromatic hydrocarbons (PAHs) single,and their mixtures f
Recent studies show that triclosan (TCS) exposure causes reduction in pigments,suppres-sion of photosynthesis,and induction of oxidative stress at the physiological level,resulting in morphological alteration and growth inhibition in algae including Raphi
Urbanization often exerts multiple effects on aquatic and terrestrial organisms,including changes in biodiversity,species composition and ecosystem functions.However,the im-pacts of urbanization on river phytoplankton in subtropical urbanizing watersheds
Arsenic (As) and antimony (Sb) are usually coexistent in mine wastes and pose a great threat to human health.The As immobilization by nano zero-valent iron (nZVI) is promising,how-ever,the stabilization for co-occurring As and Sb is not known.Herein,the i
This study investigated concentrations of PM2.5,PM10,SO2,NO2,CO and O3,and air quality index (AQI) values across 368 cities in mainland China during 2015-2018.The study further examined relationships of air pollution status with local industrial capacitie
Airborne fine particulate matter (PM2.5) is known to cause respiratory inflammation such as chronic obstructive pulmonary disease and lung fibrosis.NLRP3 inflammasome acti-vation has been implicated in these diseases;however,due to the complexity in PM2.5
The brown mussel Perna perna (Linnaeus,1758) is a valuable resource for aquaculture in trop-ical and subtropical coastal regions.It presents desirable characteristics for biomonitoring,including being sessile,widely distributed and abundant,and is a filte