检索结果-南通市图书馆

Science China Earth Sciences 2019年第5期62卷 853-862页

作者： keshao liu TANDong YAO Yongqin liu Baiqing XU Anyi HU Yuying CHEN Key Laboratory of Tibetan Environment Changes and Land Surface Processes Chinese Academy of Sciences University of Chinese Academy of Sciences CAS Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences Key Laboratory of Alpine Ecology and Biodiversity Chinese Academy of Sciences Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences

Elevational gradients are powerful ‘natural laboratory' for testing the responses of microbes to geophysical influences. Microbial communities are normally composed of a few abundant and many rare taxa. Abundant and rare taxa play different ecological roles in kinds of environments, but how their diversity and composition patterns response to elevation gradients is still poorly elucidated. In this study, we investigated the elevational patterns of abundant and rare bacterial diversity and composition in a mountain stream from 712 to 3435 m at Gangrigabu Mountain on the Tibetan Plateau, China. Our results revealed abundant and rare bacteria had similar decreasing elevation trend of alpha diversity, and both of them showed a significant elevational distance-decay relationship. However, the turnover rate of the elevational distance-decay of rare bacteria was higher than that of abundant bacteria. The species-abundance distribution patterns of rare taxonomic composition were associated with the elevational gradient, while most of abundant bacterial clades did not display any relationships with *** results suggested that rare bacteria were more sensitive to changes in elevation gradient.

关键词： Rare bacteria Diversity patterns Elevation gradients Mountain stream

Human activity over natural inputs determines the bacterial community in an ice core from the Muztag ata glacier

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第5期67卷 1489-1499页

作者： Yongqin liu Nianzhi JIAO Mukan JI keshao liu Baiqing XU Bixi GUO Tandong YAO State Key Laboratory of Tibetan Plateau Earth System Resources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Center for Pan-third Pole Environment Lanzhou UniversityLanzhou 730013China University of Chinese Academy of Sciences Beijing 100101China State Key Laboratory for Marine Environmental Science Xiamen UniversityXiamen 361102China

Ice core provides a valuable vertical timeline of past climates and anthropogenic *** proxies have been widely used in these studies,but there are few biological indicators *** address this gap,we investigated the bacterial community from a 74 m ice core of Muztag ata glacier on the Tibetan Plateau to link biological indicators with past climate and anthropogenic *** analyzing the portion of the ice core with environmental proxies available(corresponding to 1907 to 1991),we observed an increase in bacterial richness throughout the ice core,which was associated with higher NH_(4)^(+),an indicator of agricultural *** bacterial community was jointly determined by human activity,natural input,and air temperature,with a strong human influence after the ***,the relative abundance of animal gut-associated bacteria,including Aerococcaceae,Nocardiaceae,Muribaculaceae,and Lachnospiraceae,was associated with livestock number changes in the Central Asian *** with other bacterial lineages,they jointly explained 59.8%of the livestock number *** study provides quantitative evidence of the associations between bacterial indicators and past climate and human activities,highlighting the potential of using bacterial proxies for ice core studies.

关键词： Ice core of Muztag ata glacier Climate change and anthropogenic activity Biological indicator Gut-associated bacteria livestock number in the Central Asian region

Glacial lakes under climate change: the imperative for comparative studies of microbial carbon metabolism in the Qinghai-Xizang Plateau and the Arctic

在线全文

学校读者我要写书评

暂无评论

Advances in Polar Science 2024年第3期35卷 324-326页

作者： liu keshao liu Yongqin State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Center for the Pan-Third Pole Environment Lanzhou UniversityLanzhou 730000China

Glacial lakes,intimately linked to glacier termini,are crucial landscape features of the Qinghai-Xizang Plateau(QXP,Qinghai-Tibet Plateau)and the *** warming has accelerated glacier retreat and the rapid expansion of glacial lakes in both *** being typically considered harsh environments,these lakes serve as vital reservoirs for microbial biodiversity and carbon *** the face of climate change,glacial lake ecosystems over the QXP and the Arctic are undergoing *** highlights the significance of conducting research and establishing long-term monitoring programs focused on microbial carbon metabolism in these glacial lakes.

关键词： glacial lakes Qinghai-Xizang Plateau Arctic microbial carbon metabolism climate change glacier retreat

Horizontal and vertical gene transfer drive sediment antibiotic resistome in an urban lagoon system

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2021年第4期33卷 11-23页

作者： Hongjie Wang Liyuan Hou Yongqin liu keshao liu Lanping Zhang Fuyi Huang Lin Wang Azhar Rashid Anyi Hu Changping Yu CAS Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry SUNY College of Environmental Science and ForestrySyracuseNY 13210USA Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Nuclear Institute for Food and Agriculture TarnabPeshawar 25000Pakistan

Rapid urbanization has resulted in pervasive occurrence of antibiotic resistance genes(ARGs)in urban aquatic ***,limited information is available concerning the ARG profiles and the forces responsible for their assembly in urban landscape lagoon ***,we employed high-throughput quantitative PCR(HT-q PCR)to characterize the spatial variations of ARGs in surface and core sediments of Yundang Lagoon,*** results indicated that the average richness and absolute abundance of ARGs were 11 and 53 times higher in the lagoon sediments as compared to pristine reference Tibetan lake sediments,highlighting the role of anthropogenic activities in ARG ***-occurrence network analysis indicated that various anaerobic prokaryotic genera belonging to Alpha-,Deltaproteobacteria,Bacteroidetes,Euryarchaeota,Firmicutes and Synergistetes were the potential hosts of *** partial least squares-path modeling(PLS-PM)analysis revealed positive and negative indirect effects of physicochemical factors and heavy metals on the lagoon ARG profiles,via biotic factors,*** horizontal(mediated by mobile genetic elements)and vertical(mediated by prokaryotic communities)gene transfer may directly contribute the most to drive the abundance and composition of ARGs,***,the neutral community model demonstrated that the assembly of sediment ARG communities was jointly governed by deterministic and stochastic ***,this study provides novel insights into the diversity and distribution of ARGs in the benthic habitat of urban lagoon systems and underlying mechanisms for the spread and proliferation of ARGs.

关键词： Urban landscape lagoon Antibiotic resistance genes Heavy metals Horizontal and vertical gene transfer Assembly mechanisms High-throughput quantitative PCR