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Abstract:

The present study focuses on the geographic distribution and biodiversity of the Chlorococcales in Patagonian lakes, covering a latitudinal transect. Two different approaches are considered (a) a review of the historical records of Chlorococcales in Patagonia and (b) the analysis of the morphology-based species diversity, ecological remarks, and geographic distribution of the chlorococcalean species recorded in 33 aquatic environments during surveys 2007 and 2008. A total of 308 chlorococcalean species were recorded throughout a 60-year period in Patagonian freshwater systems, encountering the highest chlorococcalean richness in lakes and shallow lakes located in the more intensively sampled areas. In our surveys 2007-2008, 72 chlorococcalean taxa were registered, among which 80% are worldwide distributed, about 19% are restricted to cold temperate areas in both hemispheres and one species (Pediastrum patagonicum) is one of the taxa probably endemic for Patagonia. The chlorococcalean richness in relation to the environmental factors, revealed that it is directly correlated with the trophic status of the water bodies (chl a:r= 0.52 and DIN:r=0.47; P < 0.05). The latitude was inversely correlated with the species richness (r= -0.40; P < 0.05), and the chlorococcalean biodiversity of the Andean lakes (mean value: 3. 64) was significantly lower (P = 0.0022) than that of the lakes from the Patagonian Plateau (mean value: 9.62). In this study we observed a decreasing trend in the biodiversity of Chlorococcales with increasing latitude, which fits in the existing ecological pattern described for different groups of organisms. © 2011 Springer Science+Business Media B.V.

Registro:

Documento: Artículo
Título:Diversity and geographic distribution of Chlorococcales (Chlorophyceae) in contrasting lakes along a latitudinal transect in Argentinean Patagonia
Autor:Tell, G.; Izaguirre, I.; Allende, L.
Filiación:Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires-CONICET, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina
Palabras clave:Argentinean Patagonia; Biodiversity; Biogeography; Chlorococcales; biological survey; geographical distribution; green alga; historical record; lake ecosystem; morphology; species diversity; species richness; taxonomy; transect; trophic status; Argentina; Patagonia; Chlorococcales; Chlorophyceae; Pediastrum
Año:2011
Volumen:20
Número:4
Página de inicio:703
Página de fin:727
DOI: http://dx.doi.org/10.1007/s10531-010-9955-1
Título revista:Biodiversity and Conservation
Título revista abreviado:Biodiversity Conserv.
ISSN:09603115
CODEN:BONSE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09603115_v20_n4_p703_Tell

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Citas:

---------- APA ----------
Tell, G., Izaguirre, I. & Allende, L. (2011) . Diversity and geographic distribution of Chlorococcales (Chlorophyceae) in contrasting lakes along a latitudinal transect in Argentinean Patagonia. Biodiversity and Conservation, 20(4), 703-727.
http://dx.doi.org/10.1007/s10531-010-9955-1
---------- CHICAGO ----------
Tell, G., Izaguirre, I., Allende, L. "Diversity and geographic distribution of Chlorococcales (Chlorophyceae) in contrasting lakes along a latitudinal transect in Argentinean Patagonia" . Biodiversity and Conservation 20, no. 4 (2011) : 703-727.
http://dx.doi.org/10.1007/s10531-010-9955-1
---------- MLA ----------
Tell, G., Izaguirre, I., Allende, L. "Diversity and geographic distribution of Chlorococcales (Chlorophyceae) in contrasting lakes along a latitudinal transect in Argentinean Patagonia" . Biodiversity and Conservation, vol. 20, no. 4, 2011, pp. 703-727.
http://dx.doi.org/10.1007/s10531-010-9955-1
---------- VANCOUVER ----------
Tell, G., Izaguirre, I., Allende, L. Diversity and geographic distribution of Chlorococcales (Chlorophyceae) in contrasting lakes along a latitudinal transect in Argentinean Patagonia. Biodiversity Conserv. 2011;20(4):703-727.
http://dx.doi.org/10.1007/s10531-010-9955-1