The southernmost Atlantic coral reef is off the subtropical island of Queimada Grande (24ºS), Brazil
The Atlantic Ocean encompasses approximately 10% of the global carbonate reef area, but the austral limits of coral reef distribution within this basin are still unclear. The lack of reef area and distribution estimates clearly hampers marine spatial planning and management in several regions, especially in the southwestern Atlantic. In this area, significant freshwater, nutrient and terrigenous sediment inputs constrain the detection of subtidal features by remote sensing. Here, we describe the coral reef of Queimada Grande Island (QGI) (24°S). The documented reef covers approximately 75,000 m2 between depths of 7 and 12 m, forming a relatively flat-topped plateau that fringes the leeward (W) side of the island. The framework was built mainly by Madracis decactis colonies that were cemented in place by crustose coralline algae (CCA). This peculiar structure lays ~1000 km south of the Abrolhos reefs, within a tropical-subtropical transition zone, constituting the southernmost Atlantic carbonate reef built by corals already reported. Our data reveal the enormous scientific and biodiversity conservation value hidden at the coastal islands of the Brazilian Biogeographical Province. Despite the high levels of fisheries activities, we found living coral coverage similar to that of southwestern Atlantic Marine Protected Areas.
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Laboratório de Ecologia e Conservação Marinha, Instituto do Mar, Universidade Federal de São Paulo, Santos, SP, Brazil
Centro de Biologia Marinha, Universidade de São Paulo, São Sebastião, SP, Brazil
Instituto de Biologia, Laboratório de Sistemas Avançados de Gestão da Produção (SAGE), Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia (COPPE), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Departamento de Ciências do Meio Ambiente, Universidade Federal Rural do Rio 20 de Janeiro, Três Rios, RJ, Brazil
Instituto Laje Viva, São Paulo, SP, Brazil
Centro de Ciências Humanas e Naturais, Universidade Federal do ABC, São Bernardo do Campo, SP, Brazil
Appeared or available online: 31 October 2018