Título:	Stable isotope analysis of oysters as a tool for environmental monitoring in a marine extractive reserve
Autor(es):	Cortez, Pedro Sant'Anna Ferreira, Nicollas Menezes Farias, Cássia de Oliveira Lopes, Giselle Pinto de Faria Anjos, Roberto Meigikos dos Coutinho, Ricardo Oliveira, Louisi de Souza Cardoso, Narcilo Felizardo, João Paulo de Sá Muniz, Marcelo Costa Monteiro, Julio Cesar Farias, Cássia de Oliveira
Palavras-chave:	Bioindicador Isótopos estáveis Impacto ambiental
Áreas de conhecimento da DGPM:	Meio Ambiente Operacional
Data do documento:	2025
Editor:	Wiley
Descrição:	The stable isotopes δ13 C and δ15 N are widely recognized and utilized as biomarkers for analysing trophic links, paleoenvironmental reconstruction, biogeography and nutrient sources. However, it is essential to further develop their applications, as theiruse in marine environmental monitoring is not as prominent. 13 C and 15 N have distinct signatures in organic compounds, which can be utilized to identify potential carbon and nitrogen sources. Marine bivalves are often employed in environmental studies as efficient bioindicators because sessile filter feeders tend to bioaccumulate pollutants. The present study analysed δ13 C and δ15 N in seston and oysters inhabiting two areas with different environmental conditions in a marine extractive reserve. The isotopic values were compared for two trophic levels and three oyster tissues, resulting in a broad view of local dynamics. Seston samples from Forno Beach (FB) exhibited depleted δ13 C values, possibly reflecting a terrigenous carbon contribution in this area. Considering oyster tissues, δ13 C and δ15 N values in the hepatopancreas were similar to seston, possibly due to oysters' role as filter feeders, supporting the use of digestive tissues for assessing short-term changes of environmental conditions. Moreover, isotope values for oyster gills and muscles suggest long-term homogeneous conditions for Anjos Beach (AB) and FB, with a predominance of marine carbon and nitrogen sources. Our results underline the relevance of analysing bivalve tissues separately because they display different turnover rates and depict variable time frames of environmental conditions. This article provides valuable information on the variables that must be considered when applying stable isotope analysis in coastal environmental monitoring, highlights knowledge gaps and recommends best practices for future work in this area.
Tipo de Acesso:	Acesso aberto
URI:	https://www.repositorio.mar.mil.br/handle/ripcmb/847529
Tipo:	Artigo científico
Aparece nas coleções:	Ciência, Tecnologia e Inovação: Coleção de Artigos

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