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Volume 41 - Number 1 - 2006

Relation between Blidingia minima (Ulvales, Chlorophyta) and environmental factors at Punta Maqueda (San Jorge Gulf, Argentina)

Susana G. Perales1 y Alicia L. Boraso1,2


1 Universidad Nacional de la Patagonia San Juan Bosco. Ciudad Universitaria Km 4, (9000) Comodoro Rivadavia, Provincia del Chubut. Argentina, 2, CONICET
2 Barrio Diadema, calle Río Negro 160, (9909) Comodoro Rivadavia, Chubut, Argentina



Environmental factors affecting Blidingia minima (Nägeli ex Kützing) Kylin were studied at Punta Maqueda (San Jorge Gulf, Argentina). Detrended correspondence analysis, redundancy analysis, log-linear models for trifactorial tables and ANOVA were used. Wall thickness is inversely related to temperature, irradiation and winds. Relative abundance is directly related to high temperature and irradiation; branches and cell size relate directly to low surge exposure and high temperature. Longer thalli were found at lower coastal levels. Highest biomass was observed in spring; bigger thalli were collected during summer; in autumn a turf was present with the highest proportion of fertile thalli and thick walled thalli. A greater proportion was found of reproductive thalli at the higher intertidal level, and in autumn and spring in comparison to summer and winter at both intertidal levels.


Key words: Macroalgae, ecology, South Atlantic Ocean




1Laboratorio de Zooplancton, Instituto de Ciencias del Mar y Limnología,Universidad Nacional Autónoma de México. A. P. 70-305, 04510 México, D. F. México
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