Bacterial community changes during fir needle litter decomposition in an alpine forest in eastern Tibetan Plateau

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• 作者：Yeyi Zhao ; Fuzhong Wu ; Wanqin Yang ; Wei He ; Bo Tan…
• 关键词：Abies faxoniana ; alpine forest ; bacterial community ; DGGE ; litter decomposition ; qPCR
• 刊名：Russian Journal of Ecology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：47
• 期：2
• 页码：145-157
• 全文大小：869 KB
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• 作者单位：Yeyi Zhao (1)
  Fuzhong Wu (1)
  Wanqin Yang (1)
  Wei He (1)
  Bo Tan (1)
  Zhenfeng Xu (1)
  
  1. Long-term Research Station of Alpine Forest Ecosystem, Key Laboratory of Ecological Forestry Engineering, Institute of Ecology & Forestry, Sichuan Agricultural University, Chengdu, 611130, China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Ecology
  Environment
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3334

文摘

Bacterial community plays an important role in litter decomposition. Although the changes of bacterial community as litter decomposition proceeding can be regulated by frozen temperature and changed litter quality in cold regimes, little information has been available on. Therefore, the structure and diversity of the bacterial community in Minjiang fir (Abies faxoniana) needle litter were measured in an alpine forest in eastern Tibetan Plateau. The litter samples were sampled at the onset of the freezing stage, the deep freezing stage, the thawing stage, the early growing season and the late growing season from December 2010 to November 2011. The methods of real-time polymerase chain reaction (qPCR) coupled with denaturing gradient gel electrophoresis (DGGE) were used. The copy numbers of bacterial 16S rDNA in the fir needle litter changed significantly as litter decomposition proceeding. The abundance of bacterial 16S rDNA was significantly lower at the deep freezing stage but highest at the thawing stage. A large number of bands were observed on the DGGE gel; the intensities and distances of the bands were significantly different among the samples at different stages; the indexes of bacterial diversity at the onset of the freezing and deep freezing stages were lower than them at the other stages. All of the bacterial sequences were affiliated with six distinct classes and an unknown group. Redundancy analysis indicated that moisture, mass loss and the release of litter elements (e.g., C, N, P) exerted obvious influences over the bacterial communities.