文献类型：期刊文献

英文题名：Patterns and drivers of prokaryotic communities in thermokarst lake water across Northern Hemisphere

作者：Kang, Luyao[1,2,3] Chen, Leiyi[1,2] Li, Ziliang[1,2,3] Wang, Jianjun[4] Xue, Kai[3] Deng, Ye[3,5] Delgado-Baquerizo, Manuel[6] Song, Yutong[1,2,3] Zhang, Dianye[1,2] Yang, Guibiao[1,2] Zhou, Wei[1,2,3] Liu, Xuning[1,2,3] Liu, Futing[7] Yang, Yuanhe[1,2,3]

第一作者：Kang, Luyao

通信作者：Yang, YH[1]

机构：[1]Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China;[2]China Natl Bot Garden, Beijing, Peoples R China;[3]Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China;[4]Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing, Peoples R China;[5]Chinese Acad Sci, Res Ctr Ecoenvironm Sci, CAS Key Lab Environm Biotechnol, Beijing, Peoples R China;[6]Inst Recursos Nat & Agrobiol Sevilla IRNAS, Lab Biodivers & Funcionamiento Ecosistem BioFunLab, CSIC, Seville, Spain;[7]Chinese Acad Forestry, Key Lab Tree Breeding & Cultivat, State Forestry & Grassland Adm, Res Inst Forestry, Beijing, Peoples R China

年份：2023

外文期刊名：GLOBAL ECOLOGY AND BIOGEOGRAPHY

收录：;Scopus(收录号：2-s2.0-85173544277);WOS:【SCI-EXPANDED(收录号:WOS:001075315800001)】；

基金：National Key Research and Development Program of China, Grant/Award Number: 2022YFF0801903; National Natural Science Foundation of China, Grant/ Award Number: 31988102 and 31825006; Tencent Foundation through the XPLORER PRIZE

语种：英文

外文关键词：16S rRNA; beta diversity; biogeochemical cycles; permafrost thawing; prokaryotes; thermokarst lakes

摘要：AimThe formation of thermokarst lakes could make a large amount of carbon accessible to microbial degradation, potentially intensifying the permafrost carbon-climate feedback via carbon dioxide/methane emissions. Because of their diverse functional roles, prokaryotes could strongly mediate biogeochemical cycles in thermokarst lakes. However, little is known about the large-scale patterns and drivers of these communities.LocationPermafrost regions in the Northern Hemisphere.Time periodPresent day.Major taxa studiedProkaryotes.MethodsBased on a combination of large-scale measurements on the Tibetan Plateau and data syntheses in pan-Arctic regions, we constructed a comprehensive dataset of 16S rRNA sequences from 258 thermokarst lakes across Northern Hemisphere permafrost regions. We also used the local contributions to beta diversity (LCBD) to characterize the variance of prokaryotic species composition and screened underlying drivers by conducting a random forest modelling analysis.ResultsProkaryotes in thermokarst lake water were dominated by the orders Burkholderiales, Micrococcales, Flavobacteriales and Frankiales. The relative abundance of dominant taxa was positively associated with dissolved organic matter (DOM) properties, especially for the chromophoric/aromatic compounds. Microbial structure differed between high-altitude and high-latitude thermokarst lakes, with the dominance of Flavobacterium in high-altitude lakes, and the enrichment of Polynucleobacter in high-latitude lakes. More importantly, climatic variables were among the main drivers shaping the large-scale variation of prokaryotic communities. Specifically, mean annual precipitation was the best predictor for prokaryotic beta diversity across the Northern Hemisphere, as well as in the high-altitude permafrost regions, while mean annual air temperature played a key role in the high-latitude thermokarst lakes.Main conclusionsOur findings demonstrate significant associations between dominant taxa and DOM properties, as well as the important role of climatic factors in affecting prokaryotic communities. These findings suggest that climatic change may alter DOM conditions and induce dynamics in prokaryotic communities of thermokarst lake water in the Northern Hemisphere.