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dc.contributor.author
Beamud, Sara Guadalupe  
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Baffico, Gustavo Daniel  
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Reid, Brian  
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Torres, Rodrigo  
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Gonzalez Polo, Marina  
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Pedrozo, Fernando Luis  
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Diaz, Monica Mabel  
dc.date.available
2018-09-26T15:45:45Z  
dc.date.issued
2016-02  
dc.identifier.citation
Beamud, Sara Guadalupe; Baffico, Gustavo Daniel; Reid, Brian; Torres, Rodrigo; Gonzalez Polo, Marina; et al.; Photosynthetic performance associated with phosphorus availability in mats of Didymosphenia geminata (Bacillariophyceae) from Patagonia (Argentina and Chile); International Phycological Society; Phycologia; 55; 2; 2-2016; 118-125  
dc.identifier.issn
0031-8884  
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http://hdl.handle.net/11336/60890  
dc.description.abstract
Recently reported blooms of Didymosphenia geminata from rivers in Argentinean and Chilean Patagonia, together with non-typical blooms reported from lake systems, have the potential to alter community and ecosystem dynamics of aquatic environments in the region. In an effort to quantify key aspects of ecosystem function of D. geminata mats in Patagonia, we describe for the first time photosynthesis-irradiance (P-E) curves of this species, associated P-E parameters (R, Pmax and α) and their relationship to other functional (alkaline phosphatase activity [APA] enzyme activity and chlorophyll a) and environmental variables (soluble reactive and organic phosphorous, electrical conductivity). Mats of D. geminata from lakes and rivers representing east and west sides of the Andes from 40°S to 46°S (i.e. much of current known distribution) varied mostly in the α and Pmax parameters of P-E curves. Southern systems showed a higher α and lower Pmax parameters than more northern sites on the east slope of the cordillera. None of the P-E curves showed photoinhibition. P-E parameters for the two lakes fell within the range of values for riverine mats; although, soluble reactive P was notably higher in the lakes. We used two different statistical approaches to evaluate associations across environmental, functional or P-E parameters, finding a strong relation between APA and Pmax and a weak one between soluble reactive phosphorus, pH, dissolved organic phosphorus and functional parameters. Our results do not contradict previous observations on the importance of P availability in communities of D. geminata; although the variability in response across P-E parameters suggests a more complex mechanism of regulation than implied in the existing literature.  
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application/pdf  
dc.language.iso
eng  
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International Phycological Society  
dc.rights
info:eu-repo/semantics/openAccess  
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
DIATOMS  
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INVASIVE SPECIES  
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PHOSPHORUS  
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PHOTOSYNTHESIS-IRRADIANCE CURVES  
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Otras Ciencias Biológicas  
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Ciencias Biológicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Photosynthetic performance associated with phosphorus availability in mats of Didymosphenia geminata (Bacillariophyceae) from Patagonia (Argentina and Chile)  
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info:eu-repo/semantics/article  
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info:ar-repo/semantics/artículo  
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info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-09-24T13:54:53Z  
dc.journal.volume
55  
dc.journal.number
2  
dc.journal.pagination
118-125  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
Lawrence  
dc.description.fil
Fil: Beamud, Sara Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina  
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Fil: Baffico, Gustavo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina  
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Fil: Reid, Brian. Centro de Investigación en Ecosistemas de la Patagonia; Argentina  
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Fil: Torres, Rodrigo. Centro de Investigación en Ecosistemas de la Patagonia; Argentina  
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Fil: Gonzalez Polo, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina  
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Fil: Pedrozo, Fernando Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina  
dc.description.fil
Fil: Diaz, Monica Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina  
dc.journal.title
Phycologia  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.2216/15-83.1  
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info:eu-repo/semantics/altIdentifier/url/http://www.phycologia.org/doi/10.2216/15-83.1