Biogeographical note on Antarctic microforae: Endemism and cosmopolitanism

作     者：Waqar Azeem Jadoon Ryosuke Nakai Takeshi Naganuma 

作者机构：Graduate School of Biosphere ScienceHiroshima University1-4-4 KagamiyamaHigashi-HiroshimaHiroshima 739-8528Japan National Institute of Genetics1111 YataMishimaShizuoka 411-8540Japan Research Fellow of the Japan Society for the Promotion of ScienceChiyoda-kuTokyo 102-8471Japan 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2013年第4卷第6期

页      面：633-646页

核心收录：

学科分类：0710[理学-生物学] 1007[医学-药学(可授医学、理学学位)] 100705[医学-微生物与生化药学] 07[理学] 071005[理学-微生物学] 10[医学] 

基　　金：partly supported by the Special Coordination Fund"Archaean Park Project:International research project on interaction between sub-vent biosphere and geo-environments"of the Ministry of Education,Culture,Sports,Science and Technology of Japan the NIPR collaborative research program No.99(2002-2004) the Fund"Construct the Genetic Resource Library of Unidentifed Microbes Based on Genome Information"from the New Energy and Industrial Technology Development Organization,Japan Grants-in-Aid for Scientifc Research(11833012,14340268,and 18255005)from the Japan Society for the Promotion of Science and Antarctic samples from Livingston Island were collected during the Spanish program LIMNOPOLAR in the International Polar Year(IPY)2007-2008 campaign 

主　　题：Biogeography Cyanobacteria Halophilic bacteria 16S rRNA Molecular phylogeny 

摘      要：This study deals with the biogeography of Antarctic microflora （Antarctica acts as best model to study microbial biogeography） such as cyanobacteria and selected halophiles with special emphasis on Halomonas variabilis and Bacillus *** are known to be resistant not only to salt stress,but also to extreme temperature,pressure,and aridity and they are capable of surviving in harsh environments such as polar regions,deep-sea habitats,and *** microbes are known to be resistant to hostile environmental conditions,and are capable of surviving in harsh *** group has isolated 444 strains belonging to 28 genera of halophiles from various environments around the *** 16S rRNA gene sequences revealed that many of the isolated strains from geographically distant habitats having different environmental conditions,were closely related to each other,with some strains possessing 100％ identical *** possessing survival mechanism such as spore formation are usually *** genus Halomonas is represented by potentially endemic strains and the ubiquitous ***,while spore-forming *** showed cosmopolitan *** potentially endemic （moderate endemicity that is regional and/or continental distribution） strain was reported from Syowa station,East Antarctica,and Mario Zucchelli station,West Antarctica,which are geographically separated by 3000 ***,15 strains having 100％ similarity with *** were considered *** results of this work provide support for the middle-ground model that some microbes have moderate endemicity and others have cosmopolitan *** results will contribute to a greater understanding of microbial biogeography with special emphasis on Antarctica.