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| 34. |  | OLIVEIRA, M. V. N. d'.; BRAZ, E. M. Danos produzidos na floresta tropical em exploração planejada, considerando abate, arraste mecanizado e abertura de estradas e trilhas de arraste. In: CONGRESSO INTERNACIONAL DE COMPENSADO E MADEIRA TROPICAL, 2.; FEIRA DE MÁQUINAS E PRODUTOS DO SETOR MADEIREIRO, 1., 1994, Belém, PA. Anais... Rio de Janeiro: SENAI, 1996. p. 129-137.| Biblioteca(s): Embrapa Acre. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Acre. Para informações adicionais entre em contato com cpafac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
05/10/2011 |
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Data da última atualização: |
06/07/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
OLIVEIRA, M. V. N. d'.; RIBAS, L. A. |
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Afiliação: |
MARCUS VINICIO NEVES D OLIVEIRA, CPAF-AC; LUCIANO ARRUDA RIBAS, CPAF-AC. |
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Título: |
Forest regeneration in artificial gaps twelve years after canopy opening in Acre State Western Amazon. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Forest Ecology and Management, Amsterdam, v. 261, n. 11, p. 1722-1731, 2011. |
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ISSN: |
0378-1127 |
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DOI: |
10.1016/j.foreco.2011.01.020 |
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Idioma: |
Inglês |
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Conteúdo: |
The main objectives were to study the effect of gap size and canopy openness on the natural regeneration dynamics considering the parameters of sapling growth, recruitment, mortality, density, species composition and above-ground biomass accumulation. The study was carried out in 32 artificial gaps with sizes varying from 100 to 1200m2 and canopy openness from 10 to 45%, from the second to the twelfth year after gap creation. The gap size was measured using the vertical projection of the tree crowns on the ground (Brokaw?s definition), and the canopy openness measurement by hemispherical photography. In the first five years, mean sapling growth (0.54cmyear-1), mortality (3.9% year-1) and AGB (26.2Mgha-1 or 8.7Mgha-1 year-1) were significantly higher in the gaps than in the forest understorey (0.17cmyear-1, 1.5% year-1 and -0.59Mgha-1 year-1 respectively) and positively correlated with gap size and canopy openness. In the same period, recruitment was also significantly higher in the gaps (5.8% year-1) than in the forest understorey (0.4% year-1) but decreased with gap size and negatively correlated with canopy openness. In the first five years, the relative density of pioneer species was higher in the gaps but not significantly correlated with gap size or canopy openness. AGB increased linearly since canopy opening, and twelve years after gap creation it was still higher in larger (121.2Mgha-1 or 10.1Mgha-1 year-1) rather than smaller (62.5 ha-1 or 5.2 ha-1 year-1) gaps. Twelve years after gap creation there were no significant differences in the parameters of sapling growth, recruitment, and mortality which could be attributed to the original gap size and canopy openness. MenosThe main objectives were to study the effect of gap size and canopy openness on the natural regeneration dynamics considering the parameters of sapling growth, recruitment, mortality, density, species composition and above-ground biomass accumulation. The study was carried out in 32 artificial gaps with sizes varying from 100 to 1200m2 and canopy openness from 10 to 45%, from the second to the twelfth year after gap creation. The gap size was measured using the vertical projection of the tree crowns on the ground (Brokaw?s definition), and the canopy openness measurement by hemispherical photography. In the first five years, mean sapling growth (0.54cmyear-1), mortality (3.9% year-1) and AGB (26.2Mgha-1 or 8.7Mgha-1 year-1) were significantly higher in the gaps than in the forest understorey (0.17cmyear-1, 1.5% year-1 and -0.59Mgha-1 year-1 respectively) and positively correlated with gap size and canopy openness. In the same period, recruitment was also significantly higher in the gaps (5.8% year-1) than in the forest understorey (0.4% year-1) but decreased with gap size and negatively correlated with canopy openness. In the first five years, the relative density of pioneer species was higher in the gaps but not significantly correlated with gap size or canopy openness. AGB increased linearly since canopy opening, and twelve years after gap creation it was still higher in larger (121.2Mgha-1 or 10.1Mgha-1 year-1) rather than smaller (62.5 ha-1 or 5.2 ha-1 year-1) gaps. Twel... Mostrar Tudo |
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Palavras-Chave: |
Abertura do dossel; Acre; Amazonia Occidental; Amazônia Ocidental; Bosques tropicales; Clareira artificial; Espacios vacíos en el dosel; Manejo florestal; Manejo forestal; Regeneración natural; Western Amazon. |
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Thesagro: |
Floresta tropical; Regeneração natural; Silvicultura. |
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Thesaurus NAL: |
Canopy gaps; Forest management; Natural regeneration; Silviculture; Tropical forests. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02879naa a2200385 a 4500
001 1902522
005 2021-07-06
008 2011 bl uuuu u00u1 u #d
022 $a0378-1127
024 7 $a10.1016/j.foreco.2011.01.020$2DOI
100 1 $aOLIVEIRA, M. V. N. d'.
245 $aForest regeneration in artificial gaps twelve years after canopy opening in Acre State Western Amazon.$h[electronic resource]
260 $c2011
520 $aThe main objectives were to study the effect of gap size and canopy openness on the natural regeneration dynamics considering the parameters of sapling growth, recruitment, mortality, density, species composition and above-ground biomass accumulation. The study was carried out in 32 artificial gaps with sizes varying from 100 to 1200m2 and canopy openness from 10 to 45%, from the second to the twelfth year after gap creation. The gap size was measured using the vertical projection of the tree crowns on the ground (Brokaw?s definition), and the canopy openness measurement by hemispherical photography. In the first five years, mean sapling growth (0.54cmyear-1), mortality (3.9% year-1) and AGB (26.2Mgha-1 or 8.7Mgha-1 year-1) were significantly higher in the gaps than in the forest understorey (0.17cmyear-1, 1.5% year-1 and -0.59Mgha-1 year-1 respectively) and positively correlated with gap size and canopy openness. In the same period, recruitment was also significantly higher in the gaps (5.8% year-1) than in the forest understorey (0.4% year-1) but decreased with gap size and negatively correlated with canopy openness. In the first five years, the relative density of pioneer species was higher in the gaps but not significantly correlated with gap size or canopy openness. AGB increased linearly since canopy opening, and twelve years after gap creation it was still higher in larger (121.2Mgha-1 or 10.1Mgha-1 year-1) rather than smaller (62.5 ha-1 or 5.2 ha-1 year-1) gaps. Twelve years after gap creation there were no significant differences in the parameters of sapling growth, recruitment, and mortality which could be attributed to the original gap size and canopy openness.
650 $aCanopy gaps
650 $aForest management
650 $aNatural regeneration
650 $aSilviculture
650 $aTropical forests
650 $aFloresta tropical
650 $aRegeneração natural
650 $aSilvicultura
653 $aAbertura do dossel
653 $aAcre
653 $aAmazonia Occidental
653 $aAmazônia Ocidental
653 $aBosques tropicales
653 $aClareira artificial
653 $aEspacios vacíos en el dosel
653 $aManejo florestal
653 $aManejo forestal
653 $aRegeneración natural
653 $aWestern Amazon
700 1 $aRIBAS, L. A.
773 $tForest Ecology and Management, Amsterdam$gv. 261, n. 11, p. 1722-1731, 2011.
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