Microbial diversity at the moderate acidic stage in three different sulfidic mine tailings dumps generating acid mine drainage

Korehi, Hananeh; Blöthe, Marco; Schippers, Axel

doi:10.1016/j.resmic.2014.08.007

Cited by 73 publications

(51 citation statements)

References 39 publications

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“…Liu et al investigated the microbial communities in filed mine tailings at different acidification stages (pH range 2.0-7.0) and described a strong correlation between the pH and the diversity of microbes including the number of phylotypes and phylogenetic diversity (PD) [25]. This gradual decrease of microbial diversity during the acidification of mine tailings was also found in other studies of natural AMD environments [29,48,54], possibly owing to the stronger selective pressure on microorganisms. Chen et al conducted simulated acidification experiments on pyrite in a laboratory to study the temporal succession of microbial communities at different oxidation stages [47].…”

Section: Microbial Community Function and Dynamics During Amd Generationmentioning

confidence: 66%

“…The distribution of microbial communities in AMD is mostly correlated to pH or the so-called oxidation stage in sulfide minerals, as shown in previous studies [48,54,[59][60][61]. In our investigation of AMD (pH < 4.0) in South China, diverse environmental factors were applied to explain the variation of microbial community assembly [24,29].…”

Section: Microbial Community Assembly Across Environmental Gradients mentioning

confidence: 73%

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Microbial Diversity and Community Assembly across Environmental Gradients in Acid Mine Drainage

et al. 2017

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Abstract:Microorganisms play an important role in weathering sulfide minerals worldwide and thrive in metal-rich and extremely acidic environments in acid mine drainage (AMD). Advanced molecular methods provide in-depth information on the microbial diversity and community dynamics in the AMD-generating environment. Although the diversity is relatively low and in general inversely correlated with the acidity, a considerable number of microbial species have been detected and described in AMD ecosystems. The acidophilic microbial communities dominated by iron/sulfur-oxidizing microbes vary widely in their composition and structure across diverse environmental gradients. Environmental conditions affect the microbial community assembly via direct and indirect interactions with microbes, resulting in an environmentally dependent biogeographic pattern. This article summarizes the latest studies to provide a better understanding of the microbial biodiversity and community assembly in AMD environments.

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Section: Microbial Community Function and Dynamics During Amd Generationmentioning

confidence: 66%

Section: Microbial Community Assembly Across Environmental Gradients mentioning

confidence: 73%

Microbial Diversity and Community Assembly across Environmental Gradients in Acid Mine Drainage

et al. 2017

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“…8). This genus, composed of strictly aerobic and acidophilic species, was found to be an essential element linked to AMD formation in former studies (Korehi et al, 2014). Surprisingly, other taxa found classically in AMD-forming communities, such as Thiomonas spp., Acidocella spp.…”

Section: Initial Stage Of the Remediation Process From D0 To D7mentioning

confidence: 92%

Temporal evolution of bacterial communities associated with the in situ wetland-based remediation of a marine shore porphyry copper tailings deposit

Diaby

Dold

Rohrbach

et al. 2015

Science of The Total Environment

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“…While this genus has not been widely associated with waste rock, tailings, or other mining environments, S. plumbophila (formerly "Thiobacillus plumbophilus") was isolated from a uranium mine (47)(48)(49), and one of the few mining environments where Sulfuriferula-like clones have been previously reported was also moderately acidic pyrrhotite-bearing mine waste (27). Sulfur-oxidizing autotrophs are frequently observed in circumneutral mine wastes (24)(25)(26), but different populations may be important in the Duluth Complex because of its mineral assemblage and moderately acidic weathering conditions.…”

Section: Discussionmentioning

confidence: 99%

“…Compared with extremely acidic environments, much less is known about the microbial ecology of moderately acidic sulfide-bearing mine waste. Microbial assemblages associated with circumneutral to moderately acidic waste rock and mine tailings are often characterized by the presence of sulfur-oxidizing microorganisms such as Thiobacillus denitrificans and Thiobacillus thioparus (23)(24)(25)(26) but also often contain uncultivated taxa (23,27,28). The extent to which many of these populations impact the rate and products of sulfide mineral oxidation under moderately acidic to circumneutral conditions is not well studied.…”

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confidence: 99%

Novel Microbial Assemblages Dominate Weathered Sulfide-Bearing Rock from Copper-Nickel Deposits in the Duluth Complex, Minnesota, USA

Jones

Lapakko

Wenz

et al. 2017

Appl Environ Microbiol

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The Duluth Complex in northeastern Minnesota hosts economically significant deposits of copper, nickel, and platinum group elements (PGEs). The primary sulfide mineralogy of these deposits includes the minerals pyrrhotite, chalcopyrite, pentlandite, and cubanite, and weathering experiments show that most sulfidebearing rock from the Duluth Complex generates moderately acidic leachate (pH 4 to 6). Microorganisms are important catalysts for metal sulfide oxidation and could influence the quality of water from mines in the Duluth Complex. Nevertheless, compared with that of extremely acidic environments, much less is known about the microbial ecology of moderately acidic sulfide-bearing mine waste, and so existing information may have little relevance to those microorganisms catalyzing oxidation reactions in the Duluth Complex. Here, we characterized the microbial communities in decade-long weathering experiments (kinetic tests) conducted on crushed rock and tailings from the Duluth Complex. Analyses of 16S rRNA genes and transcripts showed that differences among microbial communities correspond to pH, rock type, and experimental treatment. Moreover, microbial communities from the weathered Duluth Complex rock were dominated by taxa that are not typically associated with acidic mine waste. The most abundant operational taxonomic units (OTUs) were from the genera Meiothermus and Sulfuriferula, as well as from diverse clades of uncultivated Chloroflexi, Acidobacteria, and Betaproteobacteria. Specific taxa, including putative sulfur-oxidizing Sulfuriferula spp., appeared to be primarily associated with Duluth Complex rock, but not pyrite-bearing rocks subjected to the same experimental treatment. We discuss the implications of these results for the microbial ecology of moderately acidic mine waste with low sulfide content, as well as for kinetic testing of mine waste.IMPORTANCE Economic sulfide mineral deposits in the Duluth Complex may represent the largest undeveloped source of copper and nickel on Earth. Microorganisms are important catalysts for sulfide mineral oxidation, and research on extreme acidophiles has improved our ability to manage and remediate mine wastes. We found that the microbial assemblages associated with weathered rock from the Duluth Complex are dominated by organisms not widely associated with mine waste or mining-impacted environments, and we describe geochemical and experimental influences on community composition. This report will be a useful foundation for understanding the microbial biogeochemistry of moderately acidic mine waste from these and similar deposits.

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Microbial diversity at the moderate acidic stage in three different sulfidic mine tailings dumps generating acid mine drainage

Cited by 73 publications

References 39 publications

Microbial Diversity and Community Assembly across Environmental Gradients in Acid Mine Drainage

Microbial Diversity and Community Assembly across Environmental Gradients in Acid Mine Drainage

Temporal evolution of bacterial communities associated with the in situ wetland-based remediation of a marine shore porphyry copper tailings deposit

Novel Microbial Assemblages Dominate Weathered Sulfide-Bearing Rock from Copper-Nickel Deposits in the Duluth Complex, Minnesota, USA

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