Effects of Bioavailable Heavy Metal Species, Arsenic, and Acid Drainage from Mine Tailings on a Microbial Community Sampled Along a Pollution Gradient in a Freshwater Ecosystem
| Autor: | Turlough M. Finan, Gary G. Leppard, Nien Nguyen, Togwell A. Jackson, Sophia Vlaar |
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| Rok vydání: | 2014 |
| Předmět: |
Pollutant
Pollution Biomass (ecology) biology Ecology media_common.quotation_subject chemistry.chemical_element biology.organism_classification Microbiology Tailings Productivity (ecology) Microbial population biology chemistry Environmental chemistry Earth and Planetary Sciences (miscellaneous) Environmental Chemistry Environmental science Arsenic General Environmental Science Acidobacteria media_common |
| Zdroj: | Geomicrobiology Journal. 32:724-750 |
| ISSN: | 1521-0529 0149-0451 |
| Popis: | Sediment and water samples representing a pollution gradient in a long, narrow lake polluted at one end by heavy metals, arsenic, and acid drainage from mine tailings, together with samples from an unpolluted reference lake, were analyzed to determine effects of pollutants on the microbial community of the polluted lake. Ribosomal ribonucleic acid, fatty acid, and phospholipid analyses, along with assays of CO2 production, denitrification, and enzyme activities, were performed to characterize the microflora; and environmental conditions were defined by various physicochemical analyses, including determination of bioavailable metal species. Mine waste pollution fostered the growth of Holophagal Acidobacteria, green sulphur bacteria, and α-Proteobacteria but inhibited numerous other types of microorganisms, reducing the overall productivity, biomass, and biodiversity of the microflora. The beneficial effects imply toleration of pollutants, suppression of competing or antagonistic species, and utilization of... |
| Databáze: | OpenAIRE |
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