Decline of activity and shifts in the methanotrophic community structure of an ombrotrophic peat bog after wildfire

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• 作者：O. V. Danilova ; S. E. Belova ; I. S. Kulichevskaya ; S. N. Dedysh
• 关键词：northern wetlands ; wildfire in peatlands ; methanotrophic bacteria ; methane oxidation ; pmoA genes
• 刊名：Microbiology
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：84
• 期：5
• 页码：624-629
• 全文大小：669 KB
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• 作者单位：O. V. Danilova (1)
  S. E. Belova (1)
  I. S. Kulichevskaya (1)
  S. N. Dedysh (1)
  
  1. Winogradsky Institute of Microbiology, Russian Academy of Sciences, Moscow, Russia
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Microbiology
  Medical Microbiology
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3237

文摘

This study examined potential disturbances of methanotrophic communities playing a key role in reducing methane emissions from the peat bog Tasin Borskoye (Vladimir oblast, Russia), as a result of the wildfire in 2007. The potential activity of the methane-oxidizing filter in the burned peatland sites and the abundance of indigenous methanotrophic bacteria were significantly reduced in comparison to the undisturbed sites. Molecular analysis of the methanotrophic community structure by means of PCR amplification and cloning of the pmoA gene encoding particulate methane monooxygenase revealed the replacement of typical peat-inhabiting, acidophilic type II methanotrophic bacteria with type I methanotrophs, which are less active in acidic environments. In summary, both the structure and the activity of the methane-oxidizing filter in burned peatland sites underwent significant changes, which were clearly pronounced even after 7 years of the natural ecosystem recovery. These results point to the long-term character of the disturbances caused by wildfire in peatlands. Keywords northern wetlands wildfire in peatlands methanotrophic bacteria methane oxidation pmoA genes