Relación de Blidingia minima (Ulvales, Chlorophyta) con factores ambientales en Punta Maqueda (golfo San Jorge, Argentina)

Abstract

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.