Spatio-temporal Variation of Sediment Methanotrophic Microorganisms in a Large Eutrophic Lake

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• 作者：Yuyin Yang ; Qun Zhao ; Yahui Cui ; Yilin Wang ; Shuguang Xie ; Yong Liu
• 关键词：Methanotrophs ; Methane oxidization ; Freshwater sediment ; Environmental factors ; Microbial community
• 刊名：Microbial Ecology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：71
• 期：1
• 页码：9-17
• 全文大小：867 KB
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• 作者单位：Yuyin Yang (1)
  Qun Zhao (1)
  Yahui Cui (1)
  Yilin Wang (2)
  Shuguang Xie (1)
  Yong Liu (2)
  
  1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
  2. Key Laboratory of Water and Sediment Sciences (Ministry of Education), College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Microbiology
  Ecology
  Geoecology and Natural Processes
  Nature Conservation
  
• 出版者：Springer New York
• ISSN：1432-184X

文摘

Aerobic methane-oxidizing bacteria (MOB) play a crucial role in mitigating the methane emission from lake ecosystems to the atmosphere. However, the distribution of methanotrophic community in shallow and eutrophic lake and its influential factors remain essentially unclear. The present study investigated sediment methanotrophic microorganisms at different sites in eutrophic freshwater Dianchi Lake (China) in two different seasons. The abundance, diversity, and structure of sediment methanotrophic community showed a profound spatial and seasonal variation. The pmoA gene copy number in lake sediments ranged from 8.71 ± 0.49 × 104 to 2.09 ± 0.03 × 107 copies per gram of dry sediment. Sediment methanotrophic communities were composed of Methylococcus and Methylobacter (type I methanotrophs) and Methylosinus (type II methanotrophs), while type I MOB usually outnumbered type II MOB. Moreover, ammonia nitrogen was found to be a potential determinant of methanotrophic community structure in Dianchi Lake.