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Title (Primary) Characterization of microbial communities in the aqueous phase of a constructed model wetland treating 1,2-dichloroethene-contaminated groundwater
Author Imfeld, G.; Aragonés, C.E.; Fetzer, I.; Mészáros, E.; Zeiger, S.; Nijenhuis, I.; Nikolausz, M.; Delerce, S.; Richnow, H.H.;
Journal FEMS Microbiology Ecology
Year 2010
Department ISOBIO; UMB; BIOENERGIE;
Volume 72
Issue 1
Language englisch;
Keywords chlorinated ethenes; compound-specific isotope analysis; DGGE; ordination methods; Dehalococcoides; biodegradation
Abstract The dynamics and composition of microbial communities in the aqueous phase of a model wetland supplied with cis- and trans-1,2-dichloroethenes (DCE)-contaminated groundwater was characterized. PCR-denaturing gradient gel electrophoresis analysis of water samples obtained from different parts of the wetland revealed that changes of the bacterial community structure coincided with a succession of the hydrochemical conditions in the wetland, from oxic towards anoxic conditions. During this transition phase, the appearance of vinyl chloride and ethene correlated with the presence of putative dechlorinating bacteria (Dehalococcoides spp., Geobacter spp. and Dehalobacter spp.). Additionally, a shift of the DCE isotopic composition indicated the progressive prevalence of reductive dechlorination in the wetland. Although the DCE degradation processes varied over time, biodegradation activity was maintained in the wetland system. 16S rRNA gene libraries revealed that Proteobacteria accounted for >50% of 16S rRNA genes clone libraries, whereas ~17% of the sequences from the wetland were related to sulphate reducers. Based on a multiple-method approach, this study illustrates the linkage between microbial community dynamics and composition, changes of hydrochemical conditions and processes of DCE degradation in a wetland system.
ID 10114
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=10114
Imfeld, G., Aragonés, C.E., Fetzer, I., Mészáros, E., Zeiger, S., Nijenhuis, I., Nikolausz, M., Delerce, S., Richnow, H.H. (2010):
Characterization of microbial communities in the aqueous phase of a constructed model wetland treating 1,2-dichloroethene-contaminated groundwater
FEMS Microbiol. Ecol. 72 (1), 74 - 88