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Experiments were conducted in Patagonian waters (Argentina) to assess the impact of solar radiation (PAR, 400–700 nm, and UVR, 280–400 nm) upon two strains of the red alga Corallina officinalis Linnaeus, characteristic of the mid and lower intertidal zone, during March 2000. Fluorescence parameters were determined using a pulse amplitude modulated (PAM) fluorometer. The two strains had different initial...
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