Dinoflagellate Assemblages in the West Iberian Upwelling Region (Sagres, Portugal) During 1994–2001

Changes in the composition of dinoflagellates from 1994 to 2001 at a station influenced by wind-induced seasonal upwelling off SW Portugal were analyzed relation oceanography. 194 taxa detected, most frequent belonged genera Tripos, Protoperidinium, Dinophysis, Diplopsalopsis, Prorocentrum and Lingulodinium. The dinoflagellate communities followed pattern, association with oceanographic forcing change conditions. Harmful species such as Dinophysis acuminata, D. acuta, caudata, Gonyaulax spp. Lingulodinium polyedra found develop during season, typically comprising summer early autumn West Iberian system, also occasionally conditions following events other seasons.