02676naa a2200385 a 450000100080000000500110000800800410001902400570006010000160011724501000013326000090023352015780024265000150182065000180183565000190185365000260187265000170189865000120191565000280192765000190195565000180197465000140199265000120200665000140201865000190203265300200205165300190207165300300209065300160212070000170213670000220215370000230217570000230219877300690222120824892022-01-19       2017    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/j.scitotenv.2017.02.1502DOI1 aBUCH, A. C.  aEcotoxicology of mercury in tropical forest soilsbImpact on earthworms.h[electronic resource]  c2017  aMercury (Hg) is one of the most toxic nonessential trace metals in the environment, with high persistence and bioaccumulation potential, and hence of serious concern to environmental quality and public health. Emitted to the atmosphere, this element can travel long distances, far from emission sources. Hg speciation can lead to Hg contamination of different ecosystem components, as well as biomagnification in trophic food webs. To evaluate the effects of atmospheric Hg deposition in tropical forests, we investigated Hg concentrations in earthworm tissues and soils of two Forest Conservation Units in State of Rio de Janeiro, Brazil. Next, we performed a laboratory study of the biological responses (cast analysis and behavioral, acute, chronic and bioaccumulation ecotoxicological tests) of two earthworms species (Pontoscolex corethrurus and Eisenia andrei) to Hg contamination in tropical artificial soil (TAS) and two natural forest soils (NS) spiked with increasing concentration of HgCl2. Field results showed Hg concentrations up to 13 times higher in earthworm tissues than in forest soils, while in the laboratory Hg accumulation after 91-days of exposure was 25 times greater in spiked-soils with 128 mg Hg kg−1 (dry wt) than in control (unspiked) soils. In all the toxicity tests P. corethrurus showed a higher adaptability or resistance to mercury than E. andrei. The role of earthworms as environmental bioremediators was confirmed in this study, showing their ability to greatly bioaccumulate trace metals while reducing Hg availability in feces.  aEarthworms  aEcotoxicology  aEisenia andrei  aenvironmental quality  aForest soils  aMercury  aPontoscolex corethrurus  aTrace elements  aMeio ambiente  aMercúrio  aMinhoca  aQualidade  aSolo florestal  aCast production  aEcotoxicologia  aTerrestrial ecotoxicology  aTrace metal1 aBROWN, G. G.1 aCORREIA, M. E. F.1 aLOURENÇATO, L. F.1 aSILVA-FILHO, E. V.  tScience of the Total Environmentgv. 589, p. 222-231, July 2017.