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dc.contributor.author
Durán Romero, Cristina
dc.contributor.author
Villafañe, Virginia Estela
dc.contributor.author
Valiñas, Macarena Soledad
dc.contributor.author
Gonçalves, Rodrigo Javier
dc.contributor.author
Helbling, Eduardo Walter
dc.date.available
2018-03-07T20:35:51Z
dc.date.issued
2017-01
dc.identifier.citation
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
dc.identifier.issn
1054-3139
dc.identifier.uri
http://hdl.handle.net/11336/38201
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Oxford University Press
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Bacterioplankton
dc.subject
Phytoplankton
dc.subject
Global Change
dc.subject.classification
Otras Ciencias Biológicas
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Solar UVR sensitivity of phyto- and bacterio-plankton communities from Patagonian coastal waters under increased nutrients and acidification
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-03-02T14:59:41Z
dc.identifier.eissn
1095-9289
dc.journal.volume
74
dc.journal.number
4
dc.journal.pagination
1062-1073
dc.journal.pais
Reino Unido
dc.journal.ciudad
Oxford
dc.description.fil
Fil: Durán Romero, Cristina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
dc.description.fil
Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Valiñas, Macarena Soledad. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Gonçalves, Rodrigo Javier. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Helbling, Eduardo Walter. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
ICES Journal of Marine Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/icesjms/article-lookup/doi/10.1093/icesjms/fsw248
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/icesjms/fsw248
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