Mercury and lead in Latin America: fauna as a key component in environmental biomonitoring
Synopsis
Heavy metals such as lead (Pb) and mercury (Hg) pose a threat to ecosystems due to their toxicity, persistence, and bioaccumulation. Their direct detection is limited by low concentrations and high environmental variability, highlighting the value of bioindicators as a tool for indirect and continuous monitoring. This study reviewed the use of bees, fish, birds, and bats as biomonitors of Pb and Hg in Latin America. Research reporting concentrations in biological matrices (muscle, liver, blood, and feathers) was compiled, analyzed using instrumental techniques such as AAS, ICP-MS, ICP-OES, and HPLC-MS. The results reveal levels exceeding international standards and the absence of regulation for specific tissues. It was concluded that these species are effective bioindicators and that legislative expansion is necessary to strengthen environmental and public health management.
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