Edinburgh Research Explorer

Bacterial Diversity of Weathered Terrestrial Icelandic Volcanic Glasses

Research output: Contribution to journalArticle

  • Laura C. Kelly
  • Charles S. Cockell
  • Yvette M. Piceno
  • Gary L. Andersen
  • Thorsteinn Thorsteinsson
  • Viggo Marteinsson

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)740-752
Number of pages13
JournalMicrobial Ecology
Volume60
Issue number4
DOIs
Publication statusPublished - Nov 2010

Abstract

The diversity of microbial communities inhabiting two terrestrial volcanic glasses of contrasting mineralogy and age was characterised. Basaltic glass from a <0.8 Ma hyaloclastite deposit (Valafell) harboured a more diverse Bacteria community than the younger rhyolitic glass from similar to 150-300 AD (Domadalshraun lava flow). Actinobacteria dominated 16S rRNA gene clone libraries from both sites, however, Proteobacteria, Acidobacteria and Cyanobacteria were also numerically abundant in each. A significant proportion (15-34%) of the sequenced clones displayed <85% sequence similarities with current database sequences, thus suggesting the presence of novel microbial diversity in each volcanic glass. The majority of clone sequences shared the greatest similarity to uncultured organisms, mainly from soil environments, among these clones from Antarctic environments and Hawaiian and Andean volcanic deposits. Additionally, a large number of clones within the Cyanobacteria and Proteobacteria were more similar to sequences from other lithic environments, included among these Icelandic clones from crystalline basalt and rhyolite, however, no similarities to sequences reported from marine volcanic glasses were observed. PhyloChip analysis detected substantially greater numbers of phylotypes at both sites than the corresponding clone libraries, but nonetheless also identified the basaltic glass community as the richer, containing approximately 29% unique phylotypes compared to rhyolitic glass.

    Research areas

  • 16S RIBOSOMAL-RNA, MICROBIAL COMMUNITY SUCCESSION, POLYMERASE-CHAIN-REACTION, DISSOLUTION RATES, BASALTIC GLASS, CLONE LIBRARY, FLOOR BASALT, OCEAN CRUST, SEA, POPULATIONS

ID: 1495626