Mangrove metal pollution induces biological tolerance to Cd on a crab sentinel species subpopulation.

Autor: Duarte LFA; Universidade Federal de São Paulo, Departamento de Ciências do Mar, Campus Baixada Santista, Rua Maria Máximo, 168, Ponta da Praia, Santos, SP 11030-100, Brazil. Electronic address: bioalemao@hotmail.com., Moreno JB; Instituto de Ciencias Marinas de Andalucía (ICMAN), Campus Río San Pedro, s/n, Puerto Real, Cádiz, Spain. Electronic address: julian.blasco@csic.es., Catharino MGM; Instituto de Pesquisas Energéticas e Nucleares (IPEN - CNEN/SP), Av. Professor Lineu Prestes, 2242, Cidade Universitária, 05508-000 São Paulo, SP, Brazil., Moreira EG; Instituto de Pesquisas Energéticas e Nucleares (IPEN - CNEN/SP), Av. Professor Lineu Prestes, 2242, Cidade Universitária, 05508-000 São Paulo, SP, Brazil. Electronic address: emoreira@ipen.br., Trombini C; Instituto de Ciencias Marinas de Andalucía (ICMAN), Campus Río San Pedro, s/n, Puerto Real, Cádiz, Spain. Electronic address: chiara.trombini@icman.csic.es., Pereira CDS; Universidade Federal de São Paulo, Departamento de Ciências do Mar, Campus Baixada Santista, Rua Maria Máximo, 168, Ponta da Praia, Santos, SP 11030-100, Brazil. Electronic address: camilo.seabra@unifesp.br.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2019 Oct 15; Vol. 687, pp. 768-779. Date of Electronic Publication: 2019 Jun 08.
DOI: 10.1016/j.scitotenv.2019.06.039
Abstrakt: Metals are persistent pollutants, able to accumulate in the biota and magnify in trophic web. In the specific case of cadmium contamination, it has been the subject of considerable interest in recent years because of its biological effects and it is one of major pollutant in estuarine areas. Ucides cordatus is considered a mangrove local sentinel crab species in Brazil and there are previous studies reporting crab subpopulations living from pristine to heavily metal impacted areas in São Paulo coast (Southeastern Brazil). Taking into account the background knowledge about these subpopulations, we proposed the hypothesis that crabs from a highly polluted mangrove (Cubatão - CUB) have developed biological tolerance to cadmium compared to animals from an Environmental Protected Area (Jureia - JUR). Aiming to verify this hypothesis, we have investigated total bioaccumulation and subcellular partition of Cd, besides biomarkers' responses during a long-term exposure bioassay (28 days, with weekly sampling) using a supposedly safe Cd concentration (0.0022 mg L -1 ). Specimens from the pristine area (JUR) accumulated higher total Cd, as such as in its biologically active form in gills. Animals living in the polluted site (CUB) presented higher amounts of Cd in the mainly detoxifying tissue (hepatopancreas), which could be considered a pathway leading to tolerance for this metal. Multivariate analysis indicated that bioaccumulation (active, detoxified and total Cd) is linked to geno-cytotoxic damages. CUB subpopulation was considered more tolerant since it presented proportionally less damage and more capacity to allocate Cd in the main detoxifying forms and tissues.
(Copyright © 2019. Published by Elsevier B.V.)
Databáze: MEDLINE
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