A biogeographic distribution of magnetotactic bacteria influenced by salinity
作者单位：Biogeomagnetism GroupPaleomagnetism and Geochronology LaboratoryKey Laboratory of the Earth's Deep InteriorInstitute of Geology and GeophysicsGhinese Academy of Sciences France-China Bio-Mineralization and Nano-Structures LaboratoryChinese Academy of Sciences
会议名称：《中国科学院地质与地球物理研究所2012年度（第12届）学术年会》
会议日期：2013年
学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程]
基 金：funded by the CAS/ SAFEA International Partnership Program for Creative Research Teams(KZCX2-YW-T10) NSFC grant (40821091)
关 键 词：magnetotactic bacteria biogeography microbial diversity salinity
摘 要：Magnetotactic bacteria(MTB),which synthesize intracellular ferromagnetic magnetite and/or greigite magnetosomes,have significant roles in global iron cycling in aquatic systems,as well as sedimentary *** occurrence of MTB has been reported in aquatic environments from freshwater to marine ecosystems;however,the distribution of MTB across heterogeneous habitats remains *** we examined the MTB communities from diverse habitats across northern and southern China,using comprehensive transmission electron microscopy and comparison of 16S rRNA gene analyses.A total of 334 16S rRNA gene sequences were analyzed,representing the most comprehensive analysis on the diversity and distribution of MTB to *** majority(95%) of sequences belong to the Alphaproteobactena,whereas a population of giant magnetotactic rod is affiliated with the Nitrospirae *** a statistical comparison of these sequence data and publicly available MTB sequences,we infer for the first time that the composition of MTB communities represents a biogeographic distribution across globally heterogeneous environments, which is influenced by salinity.