Algal structure of the littoral epilithon in lentic water bodies at Hope Bay, Antarctic Peninsula

We studied the composition and density of the algae of the littoral epilithon and the taxa turnover in nine lentic water bodies at Hope Bay, Antarctic Peninsula, during summer 2002. At each site we measured the main physical and chemical variables, and took epilithic samples for the algal analysis....

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Bibliographic Details
Main Authors: Vinocur, Alicia Liliana, Allende, Luz, Pizarro, Haydee Norma
Language:unknown
Published: 2006
Subjects:
algal community
dispersal
environmental change
epilithon
lentic environment
littoral environment
population density
structural analysis
taxonomy
Antarctic Peninsula
Antarctica
Hope Bay
West Antarctica
algae
Bacillariophyceae
Chlorophyceae
Chrysophyceae
Cyanobacteria
Xanthophyceae
Antarctic
Argentina
Antarc*
Online Access:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v29_n8_p668_Bonaventura
https://hdl.handle.net/20.500.12110/paper_07224060_v29_n8_p668_Bonaventura
Description
Summary:We studied the composition and density of the algae of the littoral epilithon and the taxa turnover in nine lentic water bodies at Hope Bay, Antarctic Peninsula, during summer 2002. At each site we measured the main physical and chemical variables, and took epilithic samples for the algal analysis. Two composed samples (one for qualitative and one for quantitative analysis) were taken randomly about 1 m away from the shore-line of each sampling site. The morphology of the algal mats could be included in the 'moat and pond type' in which Cyanobacteria are well represented. A total of 69 algal taxa were recorded in the whole study area. Chlorophyceae showed the highest taxa richness (33%), followed by Cyanobacteria (29%), Bacillariophyceae (26%), Chrysophyceae (10%), and Tribophyceae (2%). As a result of the redundancy analysis performed, we found that the number, composition, and density of taxa in the water bodies at Hope Bay were strongly influenced by nitrate and suspended solids concentrations and by the distance from the sea. The geographical trend in taxa turnover within Hope Bay was explained by elements from the combination of the metapopulation dynamics and the continuum theories, which are related to dispersal limitation and environmental heterogeneity, respectively. © Springer-Verlag 2006. Fil:Vinocur, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Allende, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pizarro, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.

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