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Volume 41 - Number 1 - 2006
Artículo


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

 

E-mail: sperales@unpata.edu.ar


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

 

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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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