Conservation status and spatial patterns of AGRRA vitality indices in Southwestern Atlantic Reefs

Autor: Kikuchi, Ruy Kenji Papa de, Leão, Zelinda Margarida de Andrade Nery, Oliveira, Marília de Dirceu Machado de
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Repositório Institucional da UFBA
Universidade Federal da Bahia (UFBA)
instacron:UFBA
Popis: Submitted by Ruy Kikuchi (kikuchi@ufba.br) on 2014-02-03T21:25:47Z No. of bitstreams: 1 01-Kikuchi-Reefs-Brazil.pdf: 1125497 bytes, checksum: fca194ab214494868d0005e29d600fc3 (MD5) Made available in DSpace on 2014-02-03T21:25:47Z (GMT). No. of bitstreams: 1 01-Kikuchi-Reefs-Brazil.pdf: 1125497 bytes, checksum: fca194ab214494868d0005e29d600fc3 (MD5) Previous issue date: 2010-05-01 Conselho Nacional para o Desenvolvimento Científico e Tecnológico (CNPq); Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB); Ministério da Ciência, Tecnologia e Inovação (MCTI) Coral reefs along the Eastern Brazilian coast extend for a distance of 800km from 12° to 18°S. They are the largest and the richest reefs of Brazil coasts, and represent the Southernmost coral reefs of the Southwestern Atlantic Ocean. Few reef surveys were performed in the 90’s in reef areas of Bahia State, particu- larly in the Abrolhos reef complex, in the Southernmost side of the state. A monitoring program applying the Atlantic and Gulf Rapid Reef Assessment (AGRRA) protocol was initiated in 2000, in the Abrolhos National Marine Park, after the creation of the South Tropical America (STA) Regional Node of the Global Coral Reef Monitoring Network (GCRMN) by the end of 1999. From that time up to 2005, nine reef surveys were con- ducted along the coast of the State of Bahia, including 26 reefs, with 95 benthic sites, 280 benthic transects, 2025 quadrats and 3537 stony corals. Eighteen of the 26 investigated reefs were assessed once and eight reefs of Abrolhos were surveyed twice to four times. The MDS ordination, analysis of similarity (ANOSIM, one way and two-way nested layouts) and similarity percentages (SIMPER) tests were applied to investigate the spatial and temporal patterns of reef vitality. Four indicators of the coral vitality: live coral cover, the density of the larger corals (colonies >20cm per reef site) and of the coral recruits (colonies
Databáze: OpenAIRE
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