Mercury in trophic webs of estuaries in the southwest Atlantic Ocean.

Autor: Trevizani TH; Universidade de São Paulo, Instituto Oceanográfico, Praça do Oceanográfico 191, São Paulo, SP 05508-120, Brazil. Electronic address: tailisi@usp.br., Figueira RCL; Universidade de São Paulo, Instituto Oceanográfico, Praça do Oceanográfico 191, São Paulo, SP 05508-120, Brazil., Santos MCO; Universidade de São Paulo, Instituto Oceanográfico, Praça do Oceanográfico 191, São Paulo, SP 05508-120, Brazil., Domit C; Laboratório de Ecologia e Conservação - Centro de Estudos do Mar, Universidade Federal do Paraná, Pontal do Paraná, PR 83255-000, Brazil.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2021 Jun; Vol. 167, pp. 112370. Date of Electronic Publication: 2021 Apr 22.
DOI: 10.1016/j.marpolbul.2021.112370
Abstrakt: Anthropogenic activities have impacted the coastal region of Brazil. In the Paranaguá estuarine complex (PEC), Cananéia-Iguape estuarine-lagoon complex (CIELC), and Santos-São Vicente estuarine complex (SSVEC), such activities occur across differing scales. In these estuaries, the concentrations of mercury (Hg) and stable nitrogen isotopes (δ 15 N) were investigated in sediments and marine organisms including benthic macrofauna, fish and cetaceans. Hg bioconcentration occurred primarily in cetaceans, polychaetes and molluscs, and reflects the impact of anthropogenic activities in the regions studied (PEC and SSVEC > CIELC). Bioaccumulation occurred in most of the studied specimens, but biodilution of Hg was observed in the trophic webs of SSVEC and CIELC. Despite measuring lower Hg levels than in studies carried out in the northern hemisphere, the results highlight potential concerns for public and environmental health in these highly productive coastal regions in the southwestern Atlantic which are important for fishing and various economic activities.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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