Document Detail


Evolution of microbial "streamer" growths in an acidic, metal-contaminated stream draining an abandoned underground copper mine.
MedLine Citation:
PMID:  25371339     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
A nine year study was carried out on the evolution of macroscopic "acid streamer" growths in acidic, metal-rich mine water from the point of construction of a new channel to drain an abandoned underground copper mine. The new channel became rapidly colonized by acidophilic bacteria: two species of autotrophic iron-oxidizers (Acidithiobacillus ferrivorans and "Ferrovum myxofaciens") and a heterotrophic iron-oxidizer (a novel genus/species with the proposed name "Acidithrix ferrooxidans"). The same bacteria dominated the acid streamer communities for the entire nine year period, with the autotrophic species accounting for ~80% of the micro-organisms in the streamer growths (as determined by terminal restriction enzyme fragment length polymorphism (T-RFLP) analysis). Biodiversity of the acid streamers became somewhat greater in time, and included species of heterotrophic acidophiles that reduce ferric iron (Acidiphilium, Acidobacterium, Acidocella and gammaproteobacterium WJ2) and other autotrophic iron-oxidizers (Acidithiobacillus ferrooxidans and Leptospirillum ferrooxidans). The diversity of archaea in the acid streamers was far more limited; relatively few clones were obtained, all of which were very distantly related to known species of euryarchaeotes. Some differences were apparent between the acid streamer community and planktonic-phase bacteria. This study has provided unique insights into the evolution of an extremophilic microbial community, and identified several novel species of acidophilic prokaryotes.
Authors:
Catherine M Kay; Owen F Rowe; Laura Rocchetti; Kris Coupland; Kevin B Hallberg; D Barrie Johnson
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Publication Detail:
Type:  Journal Article     Date:  2013-02-07
Journal Detail:
Title:  Life (Basel, Switzerland)     Volume:  3     ISSN:  2075-1729     ISO Abbreviation:  Life (Basel)     Publication Date:  2013  
Date Detail:
Created Date:  2014-11-05     Completed Date:  2014-11-05     Revised Date:  2014-11-08    
Medline Journal Info:
Nlm Unique ID:  101580444     Medline TA:  Life (Basel)     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  189-210     Citation Subset:  -    
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