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Seasonal variations in growth and reproduction of Sargassum orotavicum (Fucales, Phaeophyceae) from the Canary Islands by Tania Díaz-Villa; Marta Sansón; Julio Afonso-Carrillo is a Earth and Planetary Sciences article available to read on EtoBox.

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Phenology and spatial-temporal variation patterns during an annual cycle of Sargassum orotavicum from the Canaries have been studied for the first time. Data on morphological variation of general habit, stipes, primary and secondary branches, primary and secondary blades, vesicles and receptacles are presented. Sargassum orotavicum is a pseudoperennial species showing a significant seasonality in most parameters that have been studied. This species has four phases within the year: (1) regeneration, from perennial stipes and holdfasts in late autumn; (2) growth, with the beginning of the development of thallus structures that renew every year, in winter; (3) reproductive, with a vegetative climax prior to the reproductive, in spring; and (4) senescence and degeneration, with detachment of thallus structures that renew yearly, in summer. Biomass of branches, blades, vesicles and receptacles showed a significant seasonal variation, with maximum values in spring and minimum in late summer and autumn. This warm-temperate species exhibited a phenological behaviour intermediate between tropical and cold-temperate species of Sargassum. Analysis of within-and between-individual stability of

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Author

Tania Díaz-Villa; Marta Sansón; Julio Afonso-Carrillo

Publisher

Walter de Gruyter GmbH

Published

2005

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)