Archaeal community compositions at different depths (up to 30 m) of a municipal solid waste landfill in Taiwan as revealed by 16S rDNA cloning analyses

Ann Cheng Chen, Hiroyuki Imachi, Yuji Sekiguchi, Akiyoshi Ohashi, Hideki Harada

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Archaeal 16S rDNA clone libraries were constructed for samples taken at 10, 20 and 30 m depth in a landfill, which corresponded approximately 3, 6 and 9 years operation, respectively. Sequencing and phylogenetic analyses of representative clones showed that all of the rDNAs were closely related to typical methanogens. The distributions of phylotypes in clone libraries were similar to each other. Dominant clones in all the clone libraries were closely related to thermophilic species, such as Methanothermobacter thermautotrophicus, suggesting that the temperatures at these sites were high. This was supported by the results of H2-dependent methanogenic activity tests, showing that the activities of all samples at 55°C were much higher than those at 25°C.

Original languageEnglish
Pages (from-to)719-724
Number of pages6
JournalBiotechnology Letters
Volume25
Issue number9
DOIs
Publication statusPublished - 2003 May

Keywords

  • 16S rDNA
  • Archaea
  • Diversity
  • Landfill

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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