Microbial community signature in Lake Coeur d'Alene: Association of environmental variables and toxic heavy metal phases

dc.contributor.authorMoberly, James G.
dc.contributor.authorD'Imperio, Seth
dc.contributor.authorParker, Albert E.
dc.contributor.authorPeyton, Brent M.
dc.date.accessioned2016-07-06T22:55:50Z
dc.date.available2016-07-06T22:55:50Z
dc.date.issued2016-03
dc.description.abstractThe water and sediments of Lake Coeur d'Alene in northern Idaho (USA) have been impacted by decades of mining operations within the Coeur d'Alene mining district. Using a multivariate statistical approach, correlations were explored between the microbial community (via 16S rDNA microarray) in sediment cores and operationally defined heavy metal phases (via continuous sequential extractions). Candidate phyla NC10, OP8 and LD1PA were only detected in metal contaminated cores and diversity doubled among Natronoanaerobium in metal contaminated cores compared to the uncontaminated control site. This may suggest some increased fitness of these phyla in contaminated sediments. In contrast, diversity within the phyla Aquificae, Coprothermobacteria, and Synergistes was at least double in the uncontaminated control site. In linear models composed of two geochemical variables from the presumed sulfate reducing lineages detected in this study, orders Desulfobacterales, Desulfuromonadales, Desulfotomaculum, and Syntrophobacterales were highly correlated with Pb (positive influence) and Zn (negative influence) in the operationally defined residual fraction, and most taxa within orders from Desulfovibrionales. Bdellovibrionales highly correlated with Pb in the exchangeable/carbonate (negative influence) and oxyhydroxide (positive influence) phases. Diversity within families from metal reducing bacterial lineages Shewanellaceae, Geobacteraceae, and Rhodocyclaceae showed high correlation with Pb in the exchangeable/carbonate (negative influence) and oxyhydroxide (positive influence) phases. To our knowledge, this is the first time these techniques have been used in combination to describe a contaminated system. Resulting correlations suggest the diversity of the microbial community was influenced primarily by partitioning of heavy metals into exchangeable Pb over other Pb phases and, to a lesser extent, residual Pb to residual Zn phase partitioning.en_US
dc.description.sponsorshipNational Science Foundation under Grant No. 0628258; Defense University Research Instrumentation Program (DURIP, Contract Number: W911NF0510255); MSU Thermal Biology Institute from the NASA Exobiology Program (Project NAG5-8807)en_US
dc.identifier.citationMoberly, James , Seth D'Imperio, Albert Parker, and Brent Peyton. "Microbial community signature in Lake Coeur d'Alene: Association of environmental variables and toxic heavy metal phases." Applied Geochemistry 66 (March 2016): 174-183. DOI: 10.1016/j.apgeochem.2015.12.013.en_US
dc.identifier.issn0883-2927
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/9916
dc.titleMicrobial community signature in Lake Coeur d'Alene: Association of environmental variables and toxic heavy metal phasesen_US
dc.typeArticleen_US
mus.citation.extentfirstpage174en_US
mus.citation.extentlastpage183en_US
mus.citation.journaltitleApplied Geochemistryen_US
mus.citation.volume66en_US
mus.contributor.orcidMoberly, James G.|0000-0003-0950-0952en_US
mus.data.thumbpage6en_US
mus.identifier.categoryChemical & Material Sciencesen_US
mus.identifier.doi10.1016/j.apgeochem.2015.12.013en_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentMathematical Sciences.en_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.relation.researchgroupThermal Biology Institute.en_US
mus.relation.universityMontana State University - Bozemanen_US

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