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Temporal variation of vagile macrofauna - specially Amphipoda - associated with the Sargassum furcatum of the São Sebastião island, SP

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Author(s):
Maria Luiza Lança de Moraes
Total Authors: 1
Document type: Master's Dissertation
Press: Campinas, SP.
Institution: Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia
Defense date:
Examining board members:
Fosca Pedini Pereira Leite; Silvana Gomes Leite Siqueira; Giuliano Buzá Jacobucci
Advisor: Fosca Pedini Pereira Leite
Abstract

The macrofauna associated with Sargassum species is relatively well known on the coast of São Paulo, in studies conducted mainly in continental shore areas. Investigations on the fauna associated with Sargassum are frequent in Brazil and there are no studies comparing the composition and variation of crustacean communities associated with this brown alga in relation to continental and oceanic islands faces. Thus, in this study, we evaluated the composition, richness, diversity and geographic distribution of these communities, comparing areas facing the continent and open ocean areas on the island of São Sebastião, São Paulo, to contribute with biodiversity knowledge. The biomass and size of Sargassum furcatum varied between beaches and sampling periods, but showed no variation between continental and oceanic faces. However, epibiosis, macrofauna density and Amphipoda density showed variation for sampled beaches and sampling. The continental side showed higher density of Amphipoda. However, although the studied sampling periods presented differences in Amphipoda density, the similarity in species composition among sampling periods was high. This result suggests that the distance between the sampling periods studied not assured enough to develop that significantly distinct assemblage temporal variation. The studied faces also shared, in general, the same species composition but in different densities. Epibiosis proved to be very important for the establishment of associated species, and contributes to higher diversity. Overall, the species found are commonly found in Sargassum beds. The present study emphasizes the importance of the use of the macrofauna associated to the phital in order to contribute to the knowledge of the local biodiversity, besides serving as a counterpoint to future studies after the expansion of the port (AU)

FAPESP's process: 11/16386-0 - Diversity of fauna of amphipods (Crustacea, Amphipoda) associated with brown algae of the genus Sargassum, in portions of the coasts of the continental and oceanic island of San Sebastian, northern coast of São Paulo
Grantee:Maria Luiza Lança de Moraes
Support Opportunities: Scholarships in Brazil - Master