青藏高原纳木错湖细菌群落特征及其与高山湖泊的对比  

Microbial Community Structures in the Nam Co Lake,Tibetan Plateau,and Comparison with Other Alpine Lakes

作　　者：刘晓波[1] 康世昌[1,2] 刘勇勤[1] 韩文武[1] 

机构地区：[1]中国科学院青藏高原研究所青藏高原环境变化与地表过程实验室,北京100085 [2]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2008年第6期1041-1047,共7页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(408307434077118740871045);国家重点基础研究发展计划项目(973计划)(2005CB422004)资助

摘　　要：通过流式细胞计数和构建环境样品16S rRNA基因的克隆文库,分析了纳木错湖水细菌的群落结构特征,并与阿尔卑斯高山湖泊细菌群落结构进行了比较.纳木错6月湖水细菌数为1.21×106个.mL-1,与其它高山湖泊相似.β-Proteobacteria类细菌是纳木错湖水细菌的主要类群,占总数的61%.纳木错湖水细菌与分离自其它水生环境的细菌相似,但具耐寒的特征.由于营养条件、地理状况等物理化学特征的不同,纳木错湖与阿尔卑斯高山湖泊(J ri XIII湖)细菌的种属完全不同,纳木错湖细菌以耐寒和嗜寒细菌为主,且多样性低.The bacterial diversity and abundance in surface lake water sampled from Narn Co Lake during June, 2006, were analyzed by flow cytomertry and 16S rRNA gene clone library approaches. The bacterial abundance was about 1. 21 × 10^6 cells · mL^-1 in Nam Co, similar to other alpine lakes. Bacteria of β-Proteobacteria were dominant group in Nam Co, accounting for 61% of the total a-mount. The bacteria were similar to others in aquatic environment, but showed more psychrophilic features. Due to different nutrition and geography status, bacterial community in Nam Co is remarkably different from those in Lake Jori ⅩⅢ in the Alps. Bacteria in Nam Co have lower diversity, and more psychrophilic features than those in Lake Jori ⅩⅢ.

关 键 词：细菌 群落特征 高山湖泊 纳木错 青藏高原 

分 类 号：Q938.15[生物学—微生物学]