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dc.contributor.author
Villafañe, Virginia Estela
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dc.contributor.author
Gao,Kunshan
dc.contributor.author
Li,Ping
dc.contributor.author
Li, Gang
dc.contributor.author
Helbling, Eduardo Walter
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dc.date.available
2020-04-03T14:28:47Z
dc.date.issued
2007-12
dc.identifier.citation
Villafañe, Virginia Estela; Gao,Kunshan; Li,Ping; Li, Gang; Helbling, Eduardo Walter; Vertical mixing within the epilimnion modulates UVR-induced photoinhibition in tropical phytoplankton from Southern China; Wiley Blackwell Publishing, Inc; Freshwater Biology (print); 52; 12-2007; 1260-1270
dc.identifier.issn
0046-5070
dc.identifier.uri
http://hdl.handle.net/11336/101794
dc.description.abstract
1. The importance of vertical mixing in modulating the impact of UVR on phytoplankton photosynthesis was assessed in a tropical, shallow lake in southern China from late winter to mid-spring of 2005. 2. Daily cycles of fluorescence measurements (i.e. photosynthetic quantum yield, Y) were performed on both ‘static’ and in situ samples. Static samples were of surface water incubated at the surface of the lake under three radiation treatments – PAB (PAR + UVR, 280–700 nm), PA (PAR + UV-A, 320–700 nm) and P (PAR, 400–700 nm). In situ samples were collected every hour at three different depths – 0, 0.5 and 1 m. 3. The general daily pattern was of a significant decrease in Y from early morning towards noon, with partial recovery in the afternoon. Samples incubated under static conditions always had lower Y than those under in situ conditions at the same time of the day. 4. Under stratified conditions, no overall impact of UVR impact could be detected in situ when compared with the static samples. Further rapid vertical mixing not only counteracted the impact of UVR but also stimulated photosynthetic efficiency. 5. Based on these measurements of fluorescence, the mixing speed of cells moving within the epilimnion was estimated to range between 0.53 and 6.5 cm min)1 . 6. These data show that mixing is very important in modulating the photosynthetic response of phytoplankton exposed to natural radiation and, hence, strongly conditions the overall impact of UVR on aquatic ecosystems.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject.classification
Otros Tópicos Biológicos
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Vertical mixing within the epilimnion modulates UVR-induced photoinhibition in tropical phytoplankton from Southern China
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-04-02T14:16:22Z
dc.journal.volume
52
dc.journal.pagination
1260-1270
dc.journal.pais
Reino Unido
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dc.description.fil
Fil: Villafañe, Virginia Estela. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Shantou University; China. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Gao,Kunshan. Institute of Hydrobiology; China. Shantou University; China
dc.description.fil
Fil: Li,Ping. Shantou University; China
dc.description.fil
Fil: Li, Gang. Shantou University; China
dc.description.fil
Fil: Helbling, Eduardo Walter. Fundación Playa Unión. Estación de Fotobiología Playa Unión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Shantou University; China
dc.journal.title
Freshwater Biology (print)
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-2427.2007.01762.x
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/j.1365-2427.2007.01762.x
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