Data/hora: 12/06/2024 11:25:17

Biblioteca(s): | Embrapa Agrobiologia; Embrapa Cerrados.
Data corrente: | 24/04/2017
Data da última atualização: | 26/10/2017
Autoria: | BUCH, A. C.; SCHMELZ, R. M.; NIVA, C. C.; CORREIA, M. E. F.; SILVA FILHO, E. V.
Afiliação: | ANDRESSA CRISTHY BUCHA, UFF; RÜDIGER M. SCHMELZ, ECT TOXICOLOGY, GERMAN; CINTIA CARLA NIVA, CPAC; MARIA ELIZABETH FERNANDES CORREIA, CNPAB; EMMANOEL VIEIRA SILVA FILHO, UFF.
Título: | Mercury critical concentrations to Enchytraeus crypticus (Annelida: Oligochaeta) under normal and extreme conditions of moisture in tropical soils: reproduction and survival.
Ano de publicação: | 2017
Fonte/Imprenta: | Environmental Research, v. 165, p. 365-372, 2017.
DOI: | http://dx.doi.org/10.1016/j.envres.2017.03.005
Idioma: | Inglês
Conteúdo: | ABSTRACT: Soil provides many ecosystem services that are essential to maintain its quality and healthy development of the flora, fauna and human well-being. Environmental mercury levels may harm the survival and diversity of the soil fauna. In this respect, efforts have been made to establish limit values of mercury (Hg) in soils to terrestrial fauna. Soil organisms such as arthworms and enchytraeids have intimate contact with trace metals in soil by their oral and dermal routes, reflecting the potentially adverse effects of this contaminant. The main goal of this study was to obtain Hg critical concentrations under normal and extreme conditions of moisture in tropical soils to Enchytraeus crypticus to order to assess if climate change may potentiate their acute and chronic toxicity effects. Tropical soils were sampled from of two Forest Conservation Units of the Rio de Janeiro State ? Brazil, which has been contaminated by Hg atmospheric depositions. Worms were exposed to three moisture conditions, at 20%, 50% and 80% of water holding capacity, respectively, and in combination with different Hg (HgCl2) concentrations spiked in three types of tropical soil (two natural soils and one artificial soil). The tested concentrations ranged from 0 to 512 mg Hg kg&#8722;1 dry weight. Results indicate that the Hg toxicity is higher under increased conditions of moisture, significantly affecting survival and reproduction rate.
Palavras-Chave: | Ecotoxicity; Enchytraeids; Environmental contamination; Soil mesofauna; Trace metals.
Thesagro: | Contaminação; Ecologia Florestal; Fertilidade do Solo; Intoxicação Vegetal; Mercúrio; Toxidez.
Thesaurus Nal: | forest soils.
Categoria do assunto: | S Ciências Biológicas
Registro original: | Embrapa Cerrados (CPAC)

Exemplares:

CNPAB - (40473-1) - UPC - AP - DD - 2017.00034 -  - 2017.00034 - DIS
CPAC - (35959-1) - UPC - AP - DD -  -  -  - DIS