Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/49558
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Changes in bacterial and archaeal assemblages in an equatorial river induced by the water eutrophication of Petit Saut dam reservoir (French Guiana) |
Autor: | Dumestre, Jean-François; Casamayor, Emilio O. CSIC ORCID ; Massana, Ramon CSIC ORCID ; Pedrós-Alió, Carlos CSIC ORCID | Palabras clave: | Archaea Bacteria Biogeochemical cycles DGGE Equatorial reservoir Microbial assemblages |
Fecha de publicación: | ene-2002 | Editor: | Inter Research | Citación: | Aquatic Microbial Ecology 26(3): 209-221 (2002) | Resumen: | The microbial assemblages of Petit Saut reservoir and Sinnamary river (French Guiana, South America) were analyzed by biochemical analyses (pigments and specific fatty acids), and by polymerase chain reaction (PCR) denaturing gradient gel electrophoresis (DGGE) and sequence analysis of 16S rRNA gene fragments. Samples from a vertical profile in the reservoir and from a longitudinal profile downstream of the dam were analyzed and compared to a reference sample taken in the river, upstream of the reservoir. The distribution of bacterial populations could be explained by the physico-chemical conditions of the water and the hydrodynamics induced by the hydroelectric plant. Two bacterial Œbio-filters¹ were detected by biochemical analyses: methanotrophs at the oxycline level and phototrophic green sulfur bacteria below the oxycline. A statistical analysis of the DGGE fingerprints obtained for each sample showed that the different stations could be related in a dendrogram in good agreement with their geographic location. We detected 53 bands in the bacterial DGGE fingerprints and 3 bands in the archaeal DGGE. The phylogenetic affiliation of the predominant DGGE bands was inferred by a comparative 16S rDNA partial sequence analysis (450 to 500 base pairs). Sequences obtained from the reservoir and the river were related to Proteobacteria (α, β, and γ), Cyanobacteria, green sulfur bacteria, Cytophaga, Methanomicrobiaceae and Thermoplasmales. Thus, methanotrophs and green sulfur bacteria were detected, and bacteria involved in the iron biogeochemical cycle were also shown to be dominant. The 16S rDNA-based analysis indicated that new bacterial and archaeal lineages, not detected upstream of the dam, were present in the reservoir and that the microbial diversity of these assemblages was greater than previously described by biochemical analyses. Our data provide evidence that the former bacterial assemblage was completely modified by the impounding of the reservoir, in agreement with the different biogeochemical cycles established. Minor groups of bacteria became dominant in the reservoir while others disappeared, in adaptation to the new conditions induced by flooding of rain forest | Descripción: | 13 pages, 8 figures, 3 tables | Versión del editor: | https://doi.org/10.3354/ame026209 | URI: | http://hdl.handle.net/10261/49558 | DOI: | 10.3354/ame026209 | ISSN: | 0948-3055 | E-ISSN: | 1616-1564 |
Aparece en las colecciones: | (ICM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Dumestre_et_al_2002.pdf | 376,87 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
78
checked on 18-abr-2024
WEB OF SCIENCETM
Citations
73
checked on 23-feb-2024
Page view(s)
511
checked on 23-abr-2024
Download(s)
252
checked on 23-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.