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

Química Nova

Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil¹  Malm, Olaf¹  Seixas, Tércia G.¹  Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro, Brasil¹  Baêta, Aída P.¹  Kehrig, Helena A.¹  Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, Brasil¹  Moreira, Isabel¹  Palermo, Elisabete F. A.¹ 

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 】

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

【 授权许可】

Unknown