Possible interactions between bacterial diversity, microbial activity and supraglacial hydrology of cryoconite holes in Svalbard

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Abstract

The diversity of highly active bacterial communities in cryoconite holes on three Arctic glaciers in Svalbard was investigated using terminal restriction fragment length polymorphism (T-RFLP) of the 16S rRNA locus. Construction and sequencing of clone libraries allowed several members of these communities to be identified, with Proteobacteria being the dominant one, followed by Cyanobacteria and Bacteroidetes. T-RFLP data revealed significantly different communities in holes on the (cold) valley glacier Austre Brøggerbreen relative to two adjacent (polythermal) valley glaciers, Midtre Lovénbreen and Vestre Brøggerbreen. These population compositions correlate with differences in organic matter content, temperature and the metabolic activity of microbial communities concerned. No within-glacier spatial patterns were observed in the communities identified over the 2-year period and with the 1 km-spaced sampling. We infer that surface hydrology is an important factor in the development of cryoconite bacterial communities.
Original languageEnglish
Pages (from-to)150-160
Number of pages11
JournalISME Journal
Volume5
Issue number1
Early online date22 Jul 2010
DOIs
Publication statusPublished - 01 Jan 2011

Keywords

  • Svalbard
  • bacterial diversity
  • biogeography
  • T-RFLP
  • evenness
  • spatial scaling
  • svalbard
  • Bacteria/classification
  • RNA, Ribosomal, 16S/genetics
  • Biodiversity
  • Water Cycle
  • Ice Cover/microbiology
  • Polymorphism, Restriction Fragment Length
  • Arctic Regions
  • Geologic Sediments/chemistry

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