16S rRNA gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in Southern Chile (Calbuco Island)

The mat forming bacteria covering organic matter-enriched and anoxic marine sediments underlying a salmon farm in Southern Chile, were examined using 16S rRNA gene phylogenies. This mat was absent in the sea bed outside the direct influence of the farm (360 m outside fish cages). Based on nearly com...

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Autores principales:	Aranda,Carlos, Paredes,Javier, Valenzuela,Cristian, Lam,Phyllis, Guillou,Laure
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2010
Materias:	16S rRNA genes Beggiatoa mat salmon farming sediments sulphur cycle
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382010000200006
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spelling	oai:scielo:S0717-653820100002000062011-01-3116S rRNA gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in Southern Chile (Calbuco Island)Aranda,CarlosParedes,JavierValenzuela,CristianLam,PhyllisGuillou,Laure 16S rRNA genes Beggiatoa mat salmon farming sediments sulphur cycle The mat forming bacteria covering organic matter-enriched and anoxic marine sediments underlying a salmon farm in Southern Chile, were examined using 16S rRNA gene phylogenies. This mat was absent in the sea bed outside the direct influence of the farm (360 m outside fish cages). Based on nearly complete 16S rRNA gene sequences (-1500 bp), mat-forming filamentous cells were settled as the sulphur-oxidizing and putatively dissimilative nitrate-reducing Beggiatoa spp., being closely related (up to 97% sequence identity) to Beggiatoa spp. identified in eutrophic shallow sediments in northern Europe (Danish Limfjorden and German Dangast inlets). Their phylogenetic affiliation was consistent with their morphology as vacuolated and sulphur-containing cells arranged on tandem along trichomes (18 to 28 μm diameter). Additionally, deltaproteobacterial sulphate reducers, Sulfurospirillum, Sulfurovum and Fusibacter were detected according to partial 16S rRNA gene sequences (-500 bp). Their concurrence with Beggiatoa suggested an intense and complex sulphur cycle within the surface of these aquaculture-affected sediments, which may have important implications for the necessity of more efficient benthic-bioremediation of finfish aquaculture in Chile and worldwide.info:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana (Concepción) v.74 n.2 20102010-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382010000200006en10.4067/S0717-65382010000200006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	16S rRNA genes Beggiatoa mat salmon farming sediments sulphur cycle
spellingShingle	16S rRNA genes Beggiatoa mat salmon farming sediments sulphur cycle Aranda,Carlos Paredes,Javier Valenzuela,Cristian Lam,Phyllis Guillou,Laure 16S rRNA gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in Southern Chile (Calbuco Island)
description	The mat forming bacteria covering organic matter-enriched and anoxic marine sediments underlying a salmon farm in Southern Chile, were examined using 16S rRNA gene phylogenies. This mat was absent in the sea bed outside the direct influence of the farm (360 m outside fish cages). Based on nearly complete 16S rRNA gene sequences (-1500 bp), mat-forming filamentous cells were settled as the sulphur-oxidizing and putatively dissimilative nitrate-reducing Beggiatoa spp., being closely related (up to 97% sequence identity) to Beggiatoa spp. identified in eutrophic shallow sediments in northern Europe (Danish Limfjorden and German Dangast inlets). Their phylogenetic affiliation was consistent with their morphology as vacuolated and sulphur-containing cells arranged on tandem along trichomes (18 to 28 μm diameter). Additionally, deltaproteobacterial sulphate reducers, Sulfurospirillum, Sulfurovum and Fusibacter were detected according to partial 16S rRNA gene sequences (-500 bp). Their concurrence with Beggiatoa suggested an intense and complex sulphur cycle within the surface of these aquaculture-affected sediments, which may have important implications for the necessity of more efficient benthic-bioremediation of finfish aquaculture in Chile and worldwide.
author	Aranda,Carlos Paredes,Javier Valenzuela,Cristian Lam,Phyllis Guillou,Laure
author_facet	Aranda,Carlos Paredes,Javier Valenzuela,Cristian Lam,Phyllis Guillou,Laure
author_sort	Aranda,Carlos
title	16S rRNA gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in Southern Chile (Calbuco Island)
title_short	16S rRNA gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in Southern Chile (Calbuco Island)
title_full	16S rRNA gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in Southern Chile (Calbuco Island)
title_fullStr	16S rRNA gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in Southern Chile (Calbuco Island)
title_full_unstemmed	16S rRNA gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in Southern Chile (Calbuco Island)
title_sort	16s rrna gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in southern chile (calbuco island)
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382010000200006
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16S rRNA gene-based molecular analysis of mat-forming and accompanying bacteria covering organically-enriched marine sediments underlying a salmon farm in Southern Chile (Calbuco Island)

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