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| Author(s): |
Juliana Andrade Genistretti
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto Oceanográfico (IO/DIDC) |
| Defense date: | 2013-04-29 |
| Examining board members: |
Ana Maria Setubal Pires Vanin;
Maria Teresa Valerio Berardo;
Fosca Pedini Pereira Leite
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| Advisor: | Ana Maria Setubal Pires Vanin |
| Abstract | |
This study was conducted in the largest South Atlantic reef complex, the Abrolhos Bank, and aimed to investigate the Tanaidacea community structure, that are small infaunal crustaceans common in soft bottom. Two reefs were analyzed: Sebastião Gomes (SG), located in the inner arc of the reef complex, and Parcel dos Abrolhos (PA), located in the outer arc. In July 2007, samples were collected with van Veen grabs of 0.07 m² area in SG and 0.03 m² in PA. The samples were designed in four transects around SG, and a transect in PA. Despite lower sampling effort in PA (0.81 m²) than SG (5.04 m²), tanaids were more abundant and richer in PA. There were collected a total of 221 specimens belonging to 11 species in SG, and 417 individuals belonging to 24 species in PA. The distance from the reef influence the sediment granulometry around SG, decreasing grain size, rate of carbonates and sedimentary heterogeneity. The distance also decreased richness and increased the abundance of the dominant species. SG southern transect did not present tanaids probably due to sediment resuspension in the reef base caused by south cold fronts in winter. The PA sediment was unaffected by the distance from the reef and was very heterogeneous, with high rates of carbonates in all sample sites. The PA Tanaidacea community was not related to the sedimentary characteristics analyzed. (AU) | |
| FAPESP's process: | 10/14660-4 - Composition and spatial distribution of Tanaidacea (Crustacea, Peracarida) in reef regions Parcel dos Abrolhos and Sebastião Gomes from Abrolhos Bank, Bahia, Brazil. |
| Grantee: | Juliana Andrade Genistretti |
| Support Opportunities: | Scholarships in Brazil - Master |