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dc.contributor.author
Villafañe, Virginia Estela
dc.contributor.author
Erzinger, Gilmar S.
dc.contributor.author
Strauch, Sebastian Michael
dc.contributor.author
Helbling, Eduardo Walter
dc.date.available
2017-06-01T14:34:18Z
dc.date.issued
2014
dc.identifier.citation
Villafañe, Virginia Estela; Erzinger, Gilmar S.; Strauch, Sebastian Michael; Helbling, Eduardo Walter; Photochemical activity of PSII of tropical phytoplankton communities of Southern Brazil exposed to solar radiation and nutrient addition; Elsevier Science Inc; Journal of Experimental Marine Biology and Ecology; 459; -1-2014; 199-207
dc.identifier.issn
0022-0981
dc.identifier.uri
http://hdl.handle.net/11336/17274
dc.description.abstract
We carried out short- and mid-term incubations to assess the combined impact of solar ultraviolet radiation (UVR, 280-400nm) and nutrient addition on tropical phytoplankton communities from BabitongaBay, Southern Brazil. Samples were collected at a station ~ 10km inward from the mouth i.e., Inlet, and incubated in microcosms under solar radiation at the surface of the water, with or without UVR, and under two nutrient conditions (ambient and with addition of macronutrients). Nutrient addition had the largest impact on specific growth rates, almost doubling the growth of algae as compared to ambient conditions. UVR-induced inhibition of the effective photochemical quantum yield (Y) at the initial conditions was higher at ambient nutrient conditions than in samples with nutrient addition, demonstrating the antagonistic effect among the two factors. Inhibition (k) and recovery (r) rates of Y at the beginning of the experiment suggest a high sensitivity of this community, but they were reduced after 4 days of exposure in the microcosms, hinting for the presence of acclimation mechanisms. Also, differences in taxonomic composition, with increasing dominance of diatoms in nutrient-enriched cultures, as compared to the initial time and in ambient nutrient conditions (with higher proportion offlagellates) may account for the observed variability in responses along the time as well as within treatments.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Inc
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Babitonga Bay
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Estuários
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Nutrientes
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Fotosintesis
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Estuaries
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Nutrients
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Photosynthesis
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Phytoplankton
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Ultraviolet Radiation
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Biología Marina, Limnología
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Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Photochemical activity of PSII of tropical phytoplankton communities of Southern Brazil exposed to solar radiation and nutrient addition
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-11-23T19:41:20Z
dc.journal.volume
459
dc.journal.pagination
199-207
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Villafañe, Virginia Estela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina
dc.description.fil
Fil: Erzinger, Gilmar S.. Universidade da Região de Joinville; Brasil
dc.description.fil
Fil: Strauch, Sebastian Michael. Fundación Playa Unión. Estación de Fotobiología Playa Unión; 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
Journal of Experimental Marine Biology and Ecology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022098114001634
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jembe.2014.05.027


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