Data/hora: 13/06/2024 19:03:52

Biblioteca(s): | Embrapa Agrobiologia; Embrapa Florestas.
Data corrente: | 24/04/2017
Data da última atualização: | 19/01/2022
Autoria: | BUCH, A. C.; BROWN, G. G.; CORREIA, M. E. F.; LOURENÇATO, L. F.; SILVA-FILHO, E. V.
Afiliação: | ANDRESSA CRISTHY BUCH, UNIVERSIDADE FEDERAL FLUMINENSE; GEORGE GARDNER BROWN, CNPF; MARIA ELIZABETH FERNANDES CORREIA, CNPAB; LÚCIO FÁBIO LOURENÇATO, UNIVERSIDADE FEDERAL FLUMINENSE; EMMANOEL VIEIRA SILVA-FILHO, UNIVERSIDADE FEDERAL FLUMINENSE.
Título: | Ecotoxicology of mercury in tropical forest soils: impact on earthworms.
Ano de publicação: | 2017
Fonte/Imprenta: | Science of the Total Environment, v. 589, p. 222-231, July 2017.
DOI: | https://doi.org/10.1016/j.scitotenv.2017.02.150
Idioma: | Inglês
Conteúdo: | Mercury (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&#8722;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.
Palavras-Chave: | Cast production; Ecotoxicologia; Terrestrial ecotoxicology; Trace metal.
Thesagro: | Meio ambiente; Mercúrio; Minhoca; Qualidade; Solo florestal.
Thesaurus Nal: | Earthworms; Ecotoxicology; Eisenia andrei; environmental quality; Forest soils; Mercury; Pontoscolex corethrurus; Trace elements.

Categoria do assunto:

P Recursos Naturais, Ciências Ambientais e da Terra
S Ciências Biológicas

Registro original: | Embrapa Florestas (CNPF)

Exemplares:

CNPAB - (40472-1) - UPC - AP - DD - 2017.00033 -  - 2017.00033 - DIS
CNPF - (56154-1) - UPC - AP - DD -  -  -  - DIS