A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes

11 páginas, 6 figuras, 1 tabla.

Detalles Bibliográficos
Autores: Villaescusa, Juan Antonio, Casamayor, Emilio O., Rochera, C., Velázquez, D., Chicote, Á., Quesada, Antonio, Camacho, Antonio
Tipo de recurso: artículo
Fecha de publicación:2010
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/56690
Acceso en línea:http://hdl.handle.net/10261/56690
Access Level:acceso abierto
Palabra clave:Bacterioplankton
Aquatic trophic status
Maritime Antarctic lakes
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spelling A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakesVillaescusa, Juan AntonioCasamayor, Emilio O.Rochera, C.Velázquez, D.Chicote, Á.Quesada, AntonioCamacho, AntonioBacterioplanktonAquatic trophic statusMaritime Antarctic lakes11 páginas, 6 figuras, 1 tabla.Seven maritime Antarctic lakes located on Byers Peninsula (Livingston Island, South Shetland Islands) were surveyed to determine the relationship between planktonic bacterial community composition and environmental features. Specifically, the extent to which factors other than low temperature determine the composition of bacterioplankton assemblages of maritime Antarctic lakes was evaluated. Both deep and shallow lakes in the central plateau of the Peninsula, as well as a coastal lake, were studied in order to fully account for the environmental heterogeneity of the Peninsula’s lakes. The results showed that shallow coastal lakes display eutrophic conditions, mainly due to the influence of marine animals, whereas plateau lakes are generally deeper and most are oligotrophic, with very limited inputs of nutrients and organic matter. Meso-eutrophic shallow lakes are also present on the Peninsula; they contain microbial mats and a higher trophic status because of the biologically mediated active nutrient release from the sediments. Diversity studies of the lakes’ planktonic bacterial communities using molecular techniques showed that bacterial diversity is lower in eutrophic than in oligotrophic lakes. The former also differed in community composition with respect to dominant taxa. Multivariate statistical analyses of environmental data yielded the same clustering of lakes as obtained based on the DGGE band pattern after DNA extraction and amplification of 16S rRNA gene fragments. Thus, even in extremely cold lakes, the bacterial community composition parallels other environmental factors, such as those related to trophic status. This correspondence is not only mediated by the influence of marine fauna but also by processes including sediment and ice melting dynamics. The bacterial community can therefore be considered to be equally representative as environmental abiotic variables in demonstrating the environmental heterogeneity among maritime Antarctic lakes.This study was supported by the project CGL2005-06549-C02-02/ANT from the Spanish Ministry of Education and Science to AC, which was co-financed by European FEDER funds, and CGL2005-06549-C02-01/ANT to AQ. Molecular analyses were funded by project CGL2006-27884-E/ANT to EOC. Support for travel costs was also obtained from grants CGL2007-29841-E and CTM2008-05205-E, given by the Spanish Ministry of Science and Innovation to AC.Peer reviewedHemeroteca Científica Catalana201220122010info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/56690reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.2436/20.1501.01.112info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/566902026-05-22T06:33:51Z
dc.title.none.fl_str_mv A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes
title A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes
spellingShingle A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes
Villaescusa, Juan Antonio
Bacterioplankton
Aquatic trophic status
Maritime Antarctic lakes
title_short A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes
title_full A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes
title_fullStr A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes
title_full_unstemmed A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes
title_sort A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes
dc.creator.none.fl_str_mv Villaescusa, Juan Antonio
Casamayor, Emilio O.
Rochera, C.
Velázquez, D.
Chicote, Á.
Quesada, Antonio
Camacho, Antonio
author Villaescusa, Juan Antonio
author_facet Villaescusa, Juan Antonio
Casamayor, Emilio O.
Rochera, C.
Velázquez, D.
Chicote, Á.
Quesada, Antonio
Camacho, Antonio
author_role author
author2 Casamayor, Emilio O.
Rochera, C.
Velázquez, D.
Chicote, Á.
Quesada, Antonio
Camacho, Antonio
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Bacterioplankton
Aquatic trophic status
Maritime Antarctic lakes
topic Bacterioplankton
Aquatic trophic status
Maritime Antarctic lakes
description 11 páginas, 6 figuras, 1 tabla.
publishDate 2010
dc.date.none.fl_str_mv 2010
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/56690
url http://hdl.handle.net/10261/56690
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.2436/20.1501.01.112
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Hemeroteca Científica Catalana
publisher.none.fl_str_mv Hemeroteca Científica Catalana
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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