The barnacle Chthamalus bisinuatus is the only sessile invertebrate colonizing oil patches on beachrocks one year after a massive oil spill on the Northeastern Brazilian coast.

Autor: Gusmao JB; Programa de Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Instituto de Geociências, Universidade Federal da Bahia (IGEO/UFBA), Bahia 40170-020, Brazil. Electronic address: gusmao.jb@gmail.com., Albergaria-Barbosa ACR; Programa de Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Instituto de Geociências, Universidade Federal da Bahia (IGEO/UFBA), Bahia 40170-020, Brazil; Departamento de Oceanografia, Instituto de Geociências, Universidade Federal da Bahia (IGEO/UFBA), Bahia 40170-020, Brazil., Kikuchi RKP; Departamento de Oceanografia, Instituto de Geociências, Universidade Federal da Bahia (IGEO/UFBA), Bahia 40170-020, Brazil; Programa de Pós-Graduação em Geologia, Instituto de Geociências, Universidade Federal da Bahia (IGEO/UFBA), Bahia 40170-020, Brazil., Combi T; Programa de Pós-Graduação em Geoquímica: Petróleo e Meio Ambiente (POSPETRO), Instituto de Geociências, Universidade Federal da Bahia (IGEO/UFBA), Bahia 40170-020, Brazil; Departamento de Oceanografia, Instituto de Geociências, Universidade Federal da Bahia (IGEO/UFBA), Bahia 40170-020, Brazil. Electronic address: tatiane.combi@ufba.br.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2021 Dec; Vol. 173 (Pt A), pp. 112952. Date of Electronic Publication: 2021 Sep 15.
DOI: 10.1016/j.marpolbul.2021.112952
Abstrakt: A large-scale oil spill has reached over 3000 km of the NE Brazilian coast since August 2019. The cause and origin of this spill remain mysterious, and the impacts on coastal ecosystems have not been clearly understood so far. Despite the efforts to remove the oil (mainly from local communities), oil stains are still present in beaches, mangroves, and beachrocks. In this short report, we describe the occurrence of the barnacle Chthamalus bisinuatus Pilsbry, 1916 colonizing oil spill stains on intertidal surfaces of beachrocks one year after the first oil records. We quickly assessed oil stains across three different reefs located at the Conde municipality, Bahia (NE Brazil), where the species was identified and its density on oil stains calculated. The occurrence of barnacles in oil stains was restricted to zones in the wake of the reefs. Their densities varied from 0 to 238 ind./dm 2 , with an average of 34 ± 68 ind./dm 2 . If we account for dead individuals (empty barnacle plates), they correspond to 25.9% of the sampled population. The presence of oil possibly affected barnacle survival rates but did not seem to prevent barnacle individuals from reaching adult sizes. We also found individuals of the snail Echinolittorina lineolata (d'Orbigny, 1840) crawling on these barnacles, indicating that the barnacle assemblages on oil stains are stable enough to provide refuge for these snails. It is not clear if the presence of barnacles on oil reflects the resistance of these crustaceans to the oil toxicity or is just a result of a low substrate selectivity by the cypris larvae.
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Databáze: MEDLINE
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