Bioconcentration and biomagnification of methylmercury in Guanabara bay, Rio de Janeiro

Quimica nova

Seixas, Tércia G.¹  Baêta, Aída P.¹  Moreira, Isabel¹  Palermo, Elisabete F. A.²  Malm, Olaf³  Kehrig, Helena A.³ 

[1] Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, Brasil;Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro, Brasil;Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil

关键词: biotransference of methylmercury;    water and organisms;    trophic levels.;   

DOI  :  10.1590/S0100-40422011000300003

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Methylmercurywas determined in water and aquatic biota from Guanabara Bay. Trophic transferof methylmercury was observed between trophic levels from prey (microplankton,mesoplankton and fish with different feeding habits) to top predator (pelagicdemersal fish). Top predator fish presented the highest methylmercury concentrations(320.3 ± 150.7 mg kg-1 dry wt.), whereasmicroplankton presented the lowest (8.9 ± 3.3 mgkg-1 dry wt.). The successive amplification of methylmercury concentrationsand its bioconcentration factor with increasing trophic levels from base totop indicate that biomagnification may be occurring along the food web. Resultssuggest the importance of feeding habits and trophic level in the bioaccumulationof methylmercury by aquatic biota.

【 授权许可】

CC BY