Microbial Ecology

, Volume 58, Issue 1, pp 129–139 | Cite as

Molecular Studies on the Microbial Diversity Associated with Mining-Impacted Coeur d’Alene River Sediments

  • Gurdeep Rastogi
  • Rajesh K. SaniEmail author
  • Brent M. Peyton
  • James G. Moberly
  • Timothy R. Ginn
Original Article


The prokaryotic diversity associated with highly metal-contaminated sediment samples collected from the Coeur d’Alene River (CdAR) was investigated using a cultivation-independent approach. Bacterial community structure was studied by constructing an RNA polymerase beta subunit (rpoB) gene library. Phylogenetic analysis revealed that 75.8% of the rpoB clones were associated with β-Proteobacteria while the remaining 24.2% were with γ-Proteobacteria. All phylotypes showed close similarity to previously reported cultivable lineages from metal or organic contaminant-rich environments. In an archaeal 16S rRNA gene library, 70% of the clones were affiliated to Crenarchaeota, while 30% belonged to Euryarchaeota. Most of the Euryarchaeota sequences were related to acetoclastic lineages belonging to Methanosarcinales. A single phylotype within the Euryarchaeota showed no association with cultivable euryarchaeotal lineages and might represent novel taxon. Diversity indices demonstrated greater diversity of Bacteria compared to Archaea in CdAR sediments. Sediment characterization by the X-ray fluorescence spectroscopy revealed high amount of toxic metals. To our knowledge, this is the first culture-independent survey on the prokaryotic diversity present in mining-impacted sediments of CdAR.


Methanotrophs rpoB Gene Methanosaeta pmoA Gene South Fork 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors gratefully acknowledge the financial support provided by the National Science Foundation (grant #0628258). The authors would like to thank Chris Taylor for assisting in the sequencing of clones. We appreciate the laboratory facilities provided by Dr. Sookie Bang at the South Dakota School of Mines and Technology. We also would like to thank the anonymous reviewers whose critiques were instrumental in making our manuscript of an excellent quality.


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Gurdeep Rastogi
    • 1
  • Rajesh K. Sani
    • 1
    Email author
  • Brent M. Peyton
    • 2
  • James G. Moberly
    • 2
  • Timothy R. Ginn
    • 3
  1. 1.Department of Chemical and Biological EngineeringSouth Dakota School of Mines and TechnologyRapid CityUSA
  2. 2.Department of Chemical and Biological EngineeringMontana State UniversityBozemanUSA
  3. 3.Department of Civil and Environmental EngineeringUniversity of CaliforniaDavisUSA

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