Bioconcentração e biomagnificação de metilmercúrio na baía de Guanabara, Rio de Janeiro

Química Nova

Helena A. Kehrig²  Olaf Malm²  Elisabete F. A. Palermo¹  Tércia G. Seixas¹  Aída P. Baêta¹  Isabel Moreira¹ 

[1] ,Universidade Federal do Rio de Janeiro Centro de Ciências da Saúde Instituto de Biofísica Carlos Chagas FilhoRio de Janeiro RJ ,Brasil

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

DOI  :  10.1590/S0100-40422011000300003

来源: SciELO

【 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】

CC BY-NC   
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