Insights into the Diversity of Eukaryotes in Acid Mine Drainage Biofilm Communities

Baker, Brett J., Tyson, Gene W., Goosherst, Lindsey and Banfield, Jillian F. (2009) Insights into the Diversity of Eukaryotes in Acid Mine Drainage Biofilm Communities. Applied and Environmental Microbiology, 75 7: 2192-2199. doi:10.1128/AEM.02500-08

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Author Baker, Brett J.
Tyson, Gene W.
Goosherst, Lindsey
Banfield, Jillian F.
Title Insights into the Diversity of Eukaryotes in Acid Mine Drainage Biofilm Communities
Journal name Applied and Environmental Microbiology   Check publisher's open access policy
ISSN 0099-2240
Publication date 2009-04-01
Year available 2009
Sub-type Article (original research)
DOI 10.1128/AEM.02500-08
Open Access Status File (Publisher version)
Volume 75
Issue 7
Start page 2192
End page 2199
Total pages 8
Editor L Nicholson Ornston
Place of publication United States
Publisher American Society for Microbiology
Language eng
Subject C1
Abstract Microscopic eukaryotes are known to have important ecosystem functions, but their diversity in most environments remains vastly unexplored. Here we analyzed an 18S rRNA gene library from a subsurface iron- and sulfur-oxidizing microbial community growing in highly acidic (pH < 0.9) runoff within the Richmond Mine at Iron Mountain (northern California). Phylogenetic analysis revealed that the majority (68%) of the sequences belonged to fungi. Protists falling into the deeply branching lineage named the acidophilic protist clade (APC) and the class Heterolobosea were also present. The APC group represents kingdom-level novelty, with <76% sequence similarity to 18S rRNA gene sequences of organisms from other environments. Fluorescently labeled oligonucleotide rRNA probes were designed to target each of these groups in biofilm samples, enabling abundance and morphological characterization. Results revealed that the populations vary significantly with the habitat and no group is ubiquitous. Surprisingly, many of the eukaryotic lineages (with the exception of the APC) are closely related to neutrophiles, suggesting that they recently adapted to this extreme environment. Molecular analyses presented here confirm that the number of eukaryotic species associated with the acid mine drainage (AMD) communities is low. This finding is consistent with previous results showing a limited diversity of archaea, bacteria, and viruses in AMD environments and suggests that the environmental pressures and interplay between the members of these communities limit species diversity at all trophic levels.
Keyword eukaryotes
microscopic eukaryotes
biofilm
Q-Index Code C1
Q-Index Status Confirmed Code
Additional Notes Published ahead of print on 6 February 2009

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
Advanced Water Management Centre Publications
 
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Created: Tue, 13 Apr 2010, 21:36:29 EST by Hong Lee on behalf of Advanced Water Management Centre