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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
28/08/1994 |
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Data da última atualização: |
25/06/2025 |
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Autoria: |
STROJAN, C. L. |
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Título: |
Forest leaf litter decomposition in the vicinity of a zinc smelter. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Oecologia, v. 32, p. 203-212, 1978. |
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Idioma: |
Inglês |
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Conteúdo: |
Concentrations of about 26,000 ppm Zn, 10,000 ppm Fe, 2,300 ppm Pb, 900 ppm Cd, 340 ppm Cu, and 0.40% S were measured in the O2 litter horizon about 1 km from a zinc smelter at Palmerton, Pennsylvania. Samples taken about 6 km east of the smelter had concentrations of about 15,000 ppm Zn, 6,500 ppm Fe, 970 ppm Pb, 250 ppm Cd, 170 ppm Cu, and 0.26% S. Samples from a control area about 40 km east of the smelter had concentrations of 2,800 ppm Fe, 650 ppm Zn, 260 ppm Pb, 50 ppm Cu, 9 ppm Cd, and 0.13% S.Litter bags were used to estimate first-year weight loss in sassafras leaves and a mixture of chestnut oak/red oak leaves in the three sites. At the end of one year, average weight loss for sassafras was 39.3% in the control site, 21.8% at 6 km, and 17.5% at the 1 km site. For the chestnut oak/red oak mixture, average weight loss was 36.8% (40 km), 25.7% (6 km), and 19.1% (1 km). Numbers and diversity of soil microarthropods inhabiting the litter bags showed a corresponding decline at sites near the smelter. Concentrations of Ca, Cd, Cr, Cu, Fe, Mg, Mn, N, Na, Ni, P, Pb, S and Zn in the decomposing litter were also measured.The average amount of organic matter on the forest floor was estimated to be 3.8 kg/m2 in the control site, about 3.8 kg/m2 at 6 km, and about 8.1 kg/m2 1 km from the smelter. Average thickness of the litter horizons in these three sites was 6.0 cm (40 km), 7.0 cm (6 km), and 12.4 cm (1 km), suggesting a long-term depression of decomposition and mineral cycling near the smelter MenosConcentrations of about 26,000 ppm Zn, 10,000 ppm Fe, 2,300 ppm Pb, 900 ppm Cd, 340 ppm Cu, and 0.40% S were measured in the O2 litter horizon about 1 km from a zinc smelter at Palmerton, Pennsylvania. Samples taken about 6 km east of the smelter had concentrations of about 15,000 ppm Zn, 6,500 ppm Fe, 970 ppm Pb, 250 ppm Cd, 170 ppm Cu, and 0.26% S. Samples from a control area about 40 km east of the smelter had concentrations of 2,800 ppm Fe, 650 ppm Zn, 260 ppm Pb, 50 ppm Cu, 9 ppm Cd, and 0.13% S.Litter bags were used to estimate first-year weight loss in sassafras leaves and a mixture of chestnut oak/red oak leaves in the three sites. At the end of one year, average weight loss for sassafras was 39.3% in the control site, 21.8% at 6 km, and 17.5% at the 1 km site. For the chestnut oak/red oak mixture, average weight loss was 36.8% (40 km), 25.7% (6 km), and 19.1% (1 km). Numbers and diversity of soil microarthropods inhabiting the litter bags showed a corresponding decline at sites near the smelter. Concentrations of Ca, Cd, Cr, Cu, Fe, Mg, Mn, N, Na, Ni, P, Pb, S and Zn in the decomposing litter were also measured.The average amount of organic matter on the forest floor was estimated to be 3.8 kg/m2 in the control site, about 3.8 kg/m2 at 6 km, and about 8.1 kg/m2 1 km from the smelter. Average thickness of the litter horizons in these three sites was 6.0 cm (40 km), 7.0 cm (6 km), and 12.4 cm (1 km), suggesting a long-term depression of decomposition and mineral cycli... Mostrar Tudo |
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Palavras-Chave: |
Forest. |
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Thesagro: |
Floresta; Serapilheira; Zinco. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
null
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Registro original: |
Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
01/11/1994 |
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Data da última atualização: |
01/11/1994 |
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Autoria: |
SILVA, J. C. S. |
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Título: |
Fenologia de especies do estrato herbaceo-arbustivo dos cerrados. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
In: EMBRAPA. Centro de Pesquisa Agropecuaria dos Cerrados (Planaltina, DF). Relatoria tecnico anual do Centro de Pesquisa Agropecuaria dos Cerrados 1985/1987. Planaltina, 1991. |
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Páginas: |
p.30-31. |
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Idioma: |
Português |
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Palavras-Chave: |
Avaliacao; Bulbostyles paradoxa; Evaluation; Recurso socio-economico; Socioeconomic organization. |
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Thesagro: |
Canela de Ema; Capim Barba de Bode; Cerrado; Fenologia; Recurso Natural; Vellozia Flavicans. |
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Thesaurus NAL: |
natural resources; phenology. |
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Categoria do assunto: |
-- |
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Marc: |
null
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Embrapa Cerrados (CPAC) |
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