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Start Over Author "M. Alejandra Giaveno" Publisher elsevier gmbh
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1. Archaeal and bacterial diversity in five different hydrothermal ponds in the Copahue region in Argentina

Author

Ángeles Aguilera Bazán, M. Alejandra Giaveno, Elena González Toril, M. Sofía Urbieta, and Edgardo Ruben Donati

Subjects
Biogeochemical cycle, Chemical Phenomena, Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente, Argentina, Biodiversity, ENVIRONMENTL 16S rRNA CLONE LIBRARIES, Applied Microbiology and Biotechnology, Microbiology, Hot Springs, Genes, Archaeal, Molecular ecology, Ciencias de la Tierra y relacionadas con el Medio Ambiente, FISH, RNA, Ribosomal, 16S, parasitic diseases, Extremophile, Ponds, Phylogeny, Ecology, Evolution, Behavior and Systematics, Bacteria, Geography, biology, Ecology, fungi, Sulfur cycle, Acid mine drainage, biology.organism_classification, Archaea, EXTREMOPHILES, Thermoplasmatales, SULPHUR CYCLE, GEOTHERMAL ENVIRONMENT BIODIVERSITY, Water Microbiology, CIENCIAS NATURALES Y EXACTAS
Abstract

Copahue is an acidic geothermal volcanic region in the northwest corner of Neuquén Province, Argentina. In the area, there are various ponds, pools and hot springs with different temperatures, pH values and levels of anthropogenic influence. In this study, the prokaryotic biodiversity of five representative ponds was studied by using two complementary molecular ecology techniques: phylogenetic analysis of 16S rRNA bacterial and archaeal genes and FISH (or CARD-FISH) for quantitative estimation of biodiversity. The results, supported by multivariate statistical analysis, showed that the biodiversity in Copahue ponds seemed to be determined by temperature. High temperature ponds were dominated by archaea, mainly apparently novel representatives from the orders Sulfolobales and Thermoplasmatales that had no close cultivated relatives. By contrast, moderate temperature ponds were colonised by well-characterised sulphur-oxidising bacteria related to acidic environments, such as other geothermal sites or acid mine drainage, and archaea were absent. By combining the biodiversity results from this study and the reported physicochemical features of Copahue, a preliminary model of the possible biogeochemical interaction was outlined for moderate and high temperature ponds. Fil: Urbieta, María Sofía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Centro de Investigación y Desarrollo En Fermentaciones Industriales. Universidad Nacional de la Plata. Facultad de Cs.exactas. Centro de Investigación y Desarrollo En Fermentaciones Industriales; Argentina Fil: Gonzalez Toril, Elena. Consejo Superior de Investigaciones Cientificas; España Fil: Giaveno Filippa, María Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Comahue; Argentina Fil: Aguilera Bazán, A. Consejo Superior de Investigaciones Cientificas; España Fil: Donati, Edgardo Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Centro de Investigación y Desarrollo En Fermentaciones Industriales. Universidad Nacional de la Plata. Facultad de Cs.exactas. Centro de Investigación y Desarrollo En Fermentaciones Industriales; Argentina

Published
2014

2. Archaeal and bacterial diversity in five different hydrothermal ponds in the Copahue region in Argentina.

Author

Sofía Urbieta M, Toril EG, Alejandra Giaveno M, Bazán AA, and Donati ER

Subjects
Archaea genetics, Argentina, Bacteria genetics, Chemical Phenomena, Genes, Archaeal, Geography, Phylogeny, RNA, Ribosomal, 16S genetics, Archaea classification, Bacteria classification, Biodiversity, Hot Springs microbiology, Ponds microbiology, Water Microbiology
Abstract

Copahue is an acidic geothermal volcanic region in the northwest corner of Neuquén Province, Argentina. In the area, there are various ponds, pools and hot springs with different temperatures, pH values and levels of anthropogenic influence. In this study, the prokaryotic biodiversity of five representative ponds was studied by using two complementary molecular ecology techniques: phylogenetic analysis of 16S rRNA bacterial and archaeal genes and FISH (or CARD-FISH) for quantitative estimation of biodiversity. The results, supported by multivariate statistical analysis, showed that the biodiversity in Copahue ponds seemed to be determined by temperature. High temperature ponds were dominated by archaea, mainly apparently novel representatives from the orders Sulfolobales and Thermoplasmatales that had no close cultivated relatives. By contrast, moderate temperature ponds were colonised by well-characterised sulphur-oxidising bacteria related to acidic environments, such as other geothermal sites or acid mine drainage, and archaea were absent. By combining the biodiversity results from this study and the reported physicochemical features of Copahue, a preliminary model of the possible biogeochemical interaction was outlined for moderate and high temperature ponds., (Copyright © 2014 Elsevier GmbH. All rights reserved.)

Published
2014
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