Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification

Autores
Durán Romero, Cristina; Villafañe, Virginia Estela; Valiñas, Macarena Soledad; Gonçalves, Rodrigo Javier; Helbling, Eduardo Walter
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The effects of ultraviolet radiation (UVR) under future expected conditions of acidification and increase in nutrient inputs were studied on a post-bloom phytoplankton and bacterioplankton community of Patagonian coastal waters. We performed an experiment using microcosms where two environmental conditions were mimicked using a cluster approach: present (ambient nutrients and pH) and future (increased nutrients and acidification), and acclimating the samples for five days to two radiation treatments (full solar radiation [+UVR] and exclusion of UVR [–UVR]). We evaluated the short-term (hours) sensitivity of the community to solar UVR through chlorophyll a fluorescence parameters (e.g. the effective photochemical quantum yield of PSII [ΦPSII]) at the beginning, at the mid-point and at the end of the acclimation period. Primary production and heterotrophic bacterial production (HBP) were determined, and biological weighting functions were calculated, at the beginning and at the end of the acclimation period. Mid-term effects (days) were evaluated as changes in taxonomic composition, growth rates and size structure of the community. Although the UVR-induced inhibition on ΦPSII decreased in both clusters, samples remained sensitive to UVR after the 5 days of acclimation. Also, under the future conditions, there was, in general, an increase in the phytoplankton carbon incorporation rates along the experiment as compared to the present conditions. Bacterioplankton sensitivity to UVR changed along the experiment from inhibition to enhancement of HBP, and future environmental conditions stimulated bacterial growth, probably due to indirect effects caused by phytoplankton. Those changes in the microbial loop functioning and structure under future global change conditions might have important consequences for the carbon pump and thus for the carbon sequestration and trophodynamics of Patagonian coastal waters.
Fil: Durán Romero, Cristina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Valiñas, Macarena Soledad. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Gonçalves, Rodrigo Javier. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Helbling, Eduardo Walter. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Bacterioplankton
Phytoplankton
Global Change
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/38201
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/38201
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidificationDurán Romero, CristinaVillafañe, Virginia EstelaValiñas, Macarena SoledadGonçalves, Rodrigo JavierHelbling, Eduardo WalterBacterioplanktonPhytoplanktonGlobal Changehttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The effects of ultraviolet radiation (UVR) under future expected conditions of acidification and increase in nutrient inputs were studied on a post-bloom phytoplankton and bacterioplankton community of Patagonian coastal waters. We performed an experiment using microcosms where two environmental conditions were mimicked using a cluster approach: present (ambient nutrients and pH) and future (increased nutrients and acidification), and acclimating the samples for five days to two radiation treatments (full solar radiation [+UVR] and exclusion of UVR [–UVR]). We evaluated the short-term (hours) sensitivity of the community to solar UVR through chlorophyll a fluorescence parameters (e.g. the effective photochemical quantum yield of PSII [ΦPSII]) at the beginning, at the mid-point and at the end of the acclimation period. Primary production and heterotrophic bacterial production (HBP) were determined, and biological weighting functions were calculated, at the beginning and at the end of the acclimation period. Mid-term effects (days) were evaluated as changes in taxonomic composition, growth rates and size structure of the community. Although the UVR-induced inhibition on ΦPSII decreased in both clusters, samples remained sensitive to UVR after the 5 days of acclimation. Also, under the future conditions, there was, in general, an increase in the phytoplankton carbon incorporation rates along the experiment as compared to the present conditions. Bacterioplankton sensitivity to UVR changed along the experiment from inhibition to enhancement of HBP, and future environmental conditions stimulated bacterial growth, probably due to indirect effects caused by phytoplankton. Those changes in the microbial loop functioning and structure under future global change conditions might have important consequences for the carbon pump and thus for the carbon sequestration and trophodynamics of Patagonian coastal waters.Fil: Durán Romero, Cristina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; ArgentinaFil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Valiñas, Macarena Soledad. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Gonçalves, Rodrigo Javier. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Helbling, Eduardo Walter. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaOxford University Press2017-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/38201Durán Romero, Cristina; Villafañe, Virginia Estela; Valiñas, Macarena Soledad; Gonçalves, Rodrigo Javier; Helbling, Eduardo Walter; Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification; Oxford University Press; ICES Journal of Marine Science; 74; 4; 1-2017; 1062-10731054-31391095-9289CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/icesjms/article-lookup/doi/10.1093/icesjms/fsw248info:eu-repo/semantics/altIdentifier/doi/10.1093/icesjms/fsw248info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:28:36Zoai:ri.conicet.gov.ar:11336/38201instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 14:28:36.782CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification
title Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification
spellingShingle Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification
Durán Romero, Cristina
Bacterioplankton
Phytoplankton
Global Change
title_short Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification
title_full Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification
title_fullStr Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification
title_full_unstemmed Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification
title_sort Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification
dc.creator.none.fl_str_mv Durán Romero, Cristina
Villafañe, Virginia Estela
Valiñas, Macarena Soledad
Gonçalves, Rodrigo Javier
Helbling, Eduardo Walter
author Durán Romero, Cristina
author_facet Durán Romero, Cristina
Villafañe, Virginia Estela
Valiñas, Macarena Soledad
Gonçalves, Rodrigo Javier
Helbling, Eduardo Walter
author_role author
author2 Villafañe, Virginia Estela
Valiñas, Macarena Soledad
Gonçalves, Rodrigo Javier
Helbling, Eduardo Walter
author2_role author
author
author
author
dc.subject.none.fl_str_mv Bacterioplankton
Phytoplankton
Global Change
topic Bacterioplankton
Phytoplankton
Global Change
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The effects of ultraviolet radiation (UVR) under future expected conditions of acidification and increase in nutrient inputs were studied on a post-bloom phytoplankton and bacterioplankton community of Patagonian coastal waters. We performed an experiment using microcosms where two environmental conditions were mimicked using a cluster approach: present (ambient nutrients and pH) and future (increased nutrients and acidification), and acclimating the samples for five days to two radiation treatments (full solar radiation [+UVR] and exclusion of UVR [–UVR]). We evaluated the short-term (hours) sensitivity of the community to solar UVR through chlorophyll a fluorescence parameters (e.g. the effective photochemical quantum yield of PSII [ΦPSII]) at the beginning, at the mid-point and at the end of the acclimation period. Primary production and heterotrophic bacterial production (HBP) were determined, and biological weighting functions were calculated, at the beginning and at the end of the acclimation period. Mid-term effects (days) were evaluated as changes in taxonomic composition, growth rates and size structure of the community. Although the UVR-induced inhibition on ΦPSII decreased in both clusters, samples remained sensitive to UVR after the 5 days of acclimation. Also, under the future conditions, there was, in general, an increase in the phytoplankton carbon incorporation rates along the experiment as compared to the present conditions. Bacterioplankton sensitivity to UVR changed along the experiment from inhibition to enhancement of HBP, and future environmental conditions stimulated bacterial growth, probably due to indirect effects caused by phytoplankton. Those changes in the microbial loop functioning and structure under future global change conditions might have important consequences for the carbon pump and thus for the carbon sequestration and trophodynamics of Patagonian coastal waters.
Fil: Durán Romero, Cristina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Valiñas, Macarena Soledad. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Gonçalves, Rodrigo Javier. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Helbling, Eduardo Walter. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description The effects of ultraviolet radiation (UVR) under future expected conditions of acidification and increase in nutrient inputs were studied on a post-bloom phytoplankton and bacterioplankton community of Patagonian coastal waters. We performed an experiment using microcosms where two environmental conditions were mimicked using a cluster approach: present (ambient nutrients and pH) and future (increased nutrients and acidification), and acclimating the samples for five days to two radiation treatments (full solar radiation [+UVR] and exclusion of UVR [–UVR]). We evaluated the short-term (hours) sensitivity of the community to solar UVR through chlorophyll a fluorescence parameters (e.g. the effective photochemical quantum yield of PSII [ΦPSII]) at the beginning, at the mid-point and at the end of the acclimation period. Primary production and heterotrophic bacterial production (HBP) were determined, and biological weighting functions were calculated, at the beginning and at the end of the acclimation period. Mid-term effects (days) were evaluated as changes in taxonomic composition, growth rates and size structure of the community. Although the UVR-induced inhibition on ΦPSII decreased in both clusters, samples remained sensitive to UVR after the 5 days of acclimation. Also, under the future conditions, there was, in general, an increase in the phytoplankton carbon incorporation rates along the experiment as compared to the present conditions. Bacterioplankton sensitivity to UVR changed along the experiment from inhibition to enhancement of HBP, and future environmental conditions stimulated bacterial growth, probably due to indirect effects caused by phytoplankton. Those changes in the microbial loop functioning and structure under future global change conditions might have important consequences for the carbon pump and thus for the carbon sequestration and trophodynamics of Patagonian coastal waters.
publishDate 2017
dc.date.none.fl_str_mv 2017-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/38201
Durán Romero, Cristina; Villafañe, Virginia Estela; Valiñas, Macarena Soledad; Gonçalves, Rodrigo Javier; Helbling, Eduardo Walter; Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification; Oxford University Press; ICES Journal of Marine Science; 74; 4; 1-2017; 1062-1073
1054-3139
1095-9289
CONICET Digital
CONICET
url http://hdl.handle.net/11336/38201
identifier_str_mv Durán Romero, Cristina; Villafañe, Virginia Estela; Valiñas, Macarena Soledad; Gonçalves, Rodrigo Javier; Helbling, Eduardo Walter; Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification; Oxford University Press; ICES Journal of Marine Science; 74; 4; 1-2017; 1062-1073
1054-3139
1095-9289
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/icesjms/article-lookup/doi/10.1093/icesjms/fsw248
info:eu-repo/semantics/altIdentifier/doi/10.1093/icesjms/fsw248
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.22299

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