【摘要】 [目的]分析洱海沉积物硫循环相关微生物群落多样性和空间分布特点。[方法]倾注平板计数法分析洱海沉积物硫酸盐还原菌和硫氧化细菌数量;PCR分析硫酸盐还原菌类群。[结果]洱海沉积物硫酸盐还原菌和硫氧化细菌数量的空间分布规律相一致;沉积物中检出3个硫酸盐还原菌类群,脱硫叶菌属广泛分布于各层,脱硫肠菌属分布于深层而脱硫球菌-脱硫线菌-脱硫八叠菌属则分布于较浅层。[结论]洱海沉积物硫循环相关微生物群落组成复杂。更多还原

【Abstract】 [Objective]To analyze the diversity and spatial characteristic of microbial community of sulfur cycle in Lake Erhai sediments.[Methods]Dumping culture was performed to count the numbers of sulfate-reducing bacteria and sulfate-oxi-dizing bacteria in the sediments of Lake Erhai,and PCR was utilized to analyze sulfate-reducing bacteria subgroups.[Results] The spatial distribution of sulfate-reducing bacteria coincided with sulfate-oxidizing bacteria.Three sulfate-reducing bacteria subgroups were detected.Desulfobulbus distributed widely,Desulfotomaculum scattered in the deeper sediments and Desulfococ-cus-Desulfonema-Desulfosarcina spreaded in the lower sediments.[Conclusion]The microbial community composition of sulfur cycle in Lake Ehai sediments is complex.更多还原