Article (Scientific journals)
Trophic dynamics of methylmercury and trace elements in a remote Amazonian Lake.
Eduardo Azevedo-Silva, Claudio; Carolina Pizzochero, Ana; Galvão, Petrus M A et al.
2023In Environmental Research, 237 (Pt 1), p. 116889
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Keywords :
Fish; Heavy metals; Migration; River-floodplain system; Trophic magnification factor; Trophic magnification slope; General Environmental Science; Biochemistry
Abstract :
[en] Information on pollutant trophodynamics can be crucial for public health, as contaminated food consumption may lead to deleterious effects. This study was performed in Puruzinho Lake, a remote body of water in the Brazilian Amazon from which a riparian human population obtains an important part of its animal protein intake. Samples from 92 individuals, comprising 13 species and four trophic guilds (iliophagous, planktivorous, omnivorous, and piscivorous fish) were analysed for the determination of trace elements (Fe, Cr, Mn, Ni, Zn, Ca, Sr, Cd, Sn, Tl and Pb) and methylmercury concentrations. Samples from the same individuals had already been analysed for stable isotope (SI) measurements (δ13C and δ15N) in a previous investigation and the SI data have been statistically treated with those generated in this study for the evaluation of trophic dynamics of contaminants. Methylmercury was the only analyte that biomagnified, presenting TMF values of 4.65 and 4.55 for total and resident ichthyofauna, respectively. Trace elements presented either trophic dilution or independence from the trophic position, constituting a behaviour that was coherent with that found in the scientific literature. The similarity between Ni behaviour through the trophic web to that of essential elements contributes to the discussion on the essentiality of this metal to fish. Considering the Non-cancer Risk Assessment, the calculated Target Hazard Quotient (THQ) values were higher than 1.0 for all analysed individuals for methylmercury, as well as for only one individual for nickel. No other analyte rendered THQ values higher than 1.0.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Environmental sciences & ecology
Author, co-author :
Eduardo Azevedo-Silva, Claudio;  Laboratório de Radioisótopos Eduardo Penna, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro. Av. Carlos Chagas Filho S/n, Bloco G, Sala 60, Subsolo. Cidade Universitária, Ilha Do Fundão, Rio de Janeiro, RJ, Brazil
Carolina Pizzochero, Ana;  Laboratório de Radioisótopos Eduardo Penna, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro. Av. Carlos Chagas Filho S/n, Bloco G, Sala 60, Subsolo. Cidade Universitária, Ilha Do Fundão, Rio de Janeiro, RJ, Brazil
Galvão, Petrus M A ;  Laboratório de Radioisótopos Eduardo Penna, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro. Av. Carlos Chagas Filho S/n, Bloco G, Sala 60, Subsolo. Cidade Universitária, Ilha Do Fundão, Rio de Janeiro, RJ, Brazil
Ometto, Jean P H B ;  Instituto Nacional de Pesquisas Espaciais, Centro de Ciências Do Sistema Terrestre. Avenida Dos Astronautas, 1758, Jardim da Granja, São José Dos Campos, SP, Brazil
de Camargo, Plínio B ;  Laboratório de Ecologia Isotópica, Centro de Energia Nuclear Na Agricultura, Universidade de São Paulo, Avenida Centenário, 303, São Dimas, Piracicaba, SP, Brazil
Azeredo, Antonio;  Núcleo de Estudos de Saúde Coletiva, Universidade Federal Do Rio de Janeiro. Avenida Horácio Macedo, S/N. Ilha Do Fundão, Rio de Janeiro, RJ, Brazil
Coelho-Souza, Sergio A;  Centro de Biologia Marinha, Universidade de São Paulo, (USP), Rod. Manoel Hipólito Do Rego, Km 131.5, Praia Do Cabelo Gordo, 11612-109, São Sebastião, SP, Brazil
Das, Krishna  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Bastos, Wanderley R;  Laboratório de Biogeoquímica Ambiental - Universidade Federal de Rondônia. Br 364 Km 9,5. Sentido Acre, Porto Velho, RO, Brazil
Malm, Olaf ;  Laboratório de Radioisótopos Eduardo Penna, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro. Av. Carlos Chagas Filho S/n, Bloco G, Sala 60, Subsolo. Cidade Universitária, Ilha Do Fundão, Rio de Janeiro, RJ, Brazil
Dorneles, Paulo Renato  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Language :
English
Title :
Trophic dynamics of methylmercury and trace elements in a remote Amazonian Lake.
Publication date :
16 August 2023
Journal title :
Environmental Research
ISSN :
0013-9351
eISSN :
1096-0953
Publisher :
Elsevier BV, Netherlands
Volume :
237
Issue :
Pt 1
Pages :
116889
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
14. Life below water
Available on ORBi :
since 21 August 2023

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