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The Polar Fox Lagoon in Siberia harbours a community of Bathyarchaeota possessing the potential for peptide fermentation and acetogenesis.
Antonie Van Leeuwenhoek
October 2022
Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, Nijmegen, The Netherlands.
Archaea belonging to the phylum Bathyarchaeota are the predominant archaeal species in cold, anoxic marine sediments and additionally occur in a variety of habitats, both natural and man-made. Metagenomic and single-cell sequencing studies suggest that Bathyarchaeota may have a significant impact on the emissions of greenhouse gases into the atmosphere, either through direct production of methane or through the degradation of complex organic matter that can subsequently be converted into methane. This is especially relevant in permafrost regions where climate change leads to thawing of permafrost, making high amounts of stored carbon bioavailable.
View Article and Find Full Text PDFCharacterization of four TCE-dechlorinating microbial enrichments grown with different cobalamin stress and methanogenic conditions.
Appl Microbiol Biotechnol
July 2013
Department of Civil and Environmental Engineering, University of California, 207 O'Brien Hall, Berkeley, CA 94720-1710, USA.
To investigate the important supportive microorganisms responsible for trichloroethene (TCE) bioremediation under specific environmental conditions and their relationship with Dehalococcoides (Dhc), four stable and robust enrichment cultures were generated using contaminated groundwater. Enrichments were maintained under four different conditions exploring two parameters: high and low TCE amendments (resulting in inhibited and uninhibited methanogenic activity, respectively) and with and without vitamin B₁₂ amendment. Lactate was supplied as the electron donor.
View Article and Find Full Text PDFThe Desulfitobacterium genus.
FEMS Microbiol Rev
September 2006
INRS-Institut Armand-Frappier, Laval, Québec, Canada.
Desulfitobacterium spp. are strictly anaerobic bacteria that were first isolated from environments contaminated by halogenated organic compounds. They are very versatile microorganisms that can use a wide variety of electron acceptors, such as nitrate, sulfite, metals, humic acids, and man-made or naturally occurring halogenated organic compounds.
View Article and Find Full Text PDFFunctional groups and activities of bacteria in a highly acidic volcanic mountain stream and lake in Patagonia, Argentina.
Microb Ecol
January 2002
Department of Inland Water Research Magdeburg, UFZ Centre for Environmental Research, Leipzig-Halle, Germany.
Acidic volcanic waters are naturally occurring extreme habitats that are subject of worldwide geochemical research but have been little investigated with respect to their biology. To fill this gap, the microbial ecology of a volcanic acidic river (pH approximately equal to 0-1.6), Rio Agrio, and the recipient lake Caviahue in Patagonia, Argentina, was studied.
View Article and Find Full Text PDFEvaluation of TCDD biodegradability under different redox conditions.
Chemosphere
September 2001
Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan, ROC.
Polychlorinated dibenzo-p-dioxins have been generated as unwanted by-products in many industrial processes. Although their widespread distribution in different environmental compartments has been recognized, little is known about their fate in the ultimate environment sinks. The highly stable dioxin isomer 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) has been called the most toxic compound known to man.
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