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Rapid assessment survey for exotic benthic species in the São Sebastião Channel, Brazil

2017; Escuela de Ciencias del Mar, Facultad de Recursos Naturales, Pontificia Universidad Católica de Valparaíso; Volume: 41; Issue: 2 Linguagem: Inglês

10.3856/vol41-issue2-fulltext-6

0718-560X

Antônio Carlos Marques, Aline Dos Santos Klôh, Álvaro Esteves Migotto, Ana Caroline Cabral, Ana P. Ravedutti Rigo, Ariane Lima Bettim, Emanuel Razzolini, Helena Matthews Cascon, Juliana Bardi, Laura Pioli Kremer, Leandro M. Vieira, Luís Ernesto Arruda Bezerra, Maria Angélica Haddad, Ronaldo Ruy de Oliveira Filho, Silvia Maria Millan Gutierre, Thaís Pires Miranda, Wilson Franklin, Rosana Moreira da Rocha,

Marine Biology and Ecology Research

The study of biological invasions can be roughly divided into three parts: detection, monitoring, mitigation. Here, our objectives were to describe the marine fauna of the area of the port of São Sebastião (on the northern coast of the state of São Paulo, in the São Sebastião Channel, SSC) to detect introduced species. Descriptions of the faunal community of the SSC with respect to native and allochthonous (invasive or potentially so) diversity are lacking for all invertebrate groups. Sampling was carried out by specialists within each taxonomic group, in December 2009, following the protocol of the Rapid Assessment Survey (RAS) in three areas with artificial structures as substrates. A total of 142 species were identified (61 native, 15 introduced, 62 cryptogenic, 4 not classified), of which 17 were Polychaeta (12, 1, 1, 3), 24 Ascidiacea (3, 6, 15, 0), 36 Bryozoa (17, 0, 18, 1), 27 Cnidaria (2, 1, 24, 0), 20 Crustacea (11, 4, 5, 0), 2 Entoprocta (native), 16 Mollusca (13, 3, 0, 0). Twelve species are new occurrences for the SSC. Among the introduced taxa, two are new for coastal Brazil. Estimates of introduced taxa are conservative as the results of molecular studies suggest that some species previously considered cryptogenic are indeed introduced. We emphasize that the large number of cryptogenic species illustrates the need for a long-term monitoring program, especially in areas most susceptible to bioinvasion. We conclude that rapid assessment studies, even in relatively wellknown regions, can be very useful for the detection of introduced species and we recommend that they be carried out on a larger scale in all ports with heavy ship traffic.