A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes
11 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 o...
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ftcsic:oai:digital.csic.es:10261/56690 2024-02-11T09:57:23+01:00 A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes Villaescusa, Juan Antonio Casamayor, Emilio O. Rochera, C. Velázquez, D. Chicote, Á. Quesada, Antonio Camacho, Antonio 2010 http://hdl.handle.net/10261/56690 https://doi.org/10.2436/20.1501.01.112 en eng Hemeroteca Científica Catalana http://dx.doi.org/10.2436/20.1501.01.112 International Microbiology 13(2) : 67-77 (2010) 1139-6709 http://hdl.handle.net/10261/56690 doi:10.2436/20.1501.01.112 1618-1905 open Bacterioplankton Aquatic trophic status Maritime Antarctic lakes artículo http://purl.org/coar/resource_type/c_6501 2010 ftcsic https://doi.org/10.2436/20.1501.01.112 2024-01-16T09:40:56Z 11 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 ... Article in Journal/Newspaper Antarc* Antarctic Livingston Island South Shetland Islands Digital.CSIC (Spanish National Research Council) Antarctic South Shetland Islands Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Byers ENVELOPE(-60.283,-60.283,-63.900,-63.900) Byers peninsula ENVELOPE(-61.066,-61.066,-62.633,-62.633) |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Bacterioplankton Aquatic trophic status Maritime Antarctic lakes |
spellingShingle |
Bacterioplankton Aquatic trophic status Maritime Antarctic lakes Villaescusa, Juan Antonio Casamayor, Emilio O. Rochera, C. Velázquez, D. Chicote, Á. Quesada, Antonio Camacho, Antonio A close link between bacterial community composition and environmental heterogeneity in maritime Antarctic lakes |
topic_facet |
Bacterioplankton Aquatic trophic status Maritime Antarctic lakes |
description |
11 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 ... |
format |
Article in Journal/Newspaper |
author |
Villaescusa, Juan Antonio Casamayor, Emilio O. Rochera, C. Velázquez, D. Chicote, Á. Quesada, Antonio Camacho, Antonio |
author_facet |
Villaescusa, Juan Antonio Casamayor, Emilio O. Rochera, C. Velázquez, D. Chicote, Á. Quesada, Antonio Camacho, Antonio |
author_sort |
Villaescusa, Juan Antonio |
title |
A close link between bacterial community composition and environmental heterogeneity in 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 |
close link between bacterial community composition and environmental heterogeneity in maritime antarctic lakes |
publisher |
Hemeroteca Científica Catalana |
publishDate |
2010 |
url |
http://hdl.handle.net/10261/56690 https://doi.org/10.2436/20.1501.01.112 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(-60.283,-60.283,-63.900,-63.900) ENVELOPE(-61.066,-61.066,-62.633,-62.633) |
geographic |
Antarctic South Shetland Islands Livingston Island Byers Byers peninsula |
geographic_facet |
Antarctic South Shetland Islands Livingston Island Byers Byers peninsula |
genre |
Antarc* Antarctic Livingston Island South Shetland Islands |
genre_facet |
Antarc* Antarctic Livingston Island South Shetland Islands |
op_relation |
http://dx.doi.org/10.2436/20.1501.01.112 International Microbiology 13(2) : 67-77 (2010) 1139-6709 http://hdl.handle.net/10261/56690 doi:10.2436/20.1501.01.112 1618-1905 |
op_rights |
open |
op_doi |
https://doi.org/10.2436/20.1501.01.112 |
_version_ |
1790609688359862272 |