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1. | | BRASILEIRO, A. C. M.; MORGANTE, C. V.; ARAUJO, A. C. G.; LEAL-BERTIOLI, S. C. M.; SILVA, A. K.; MARTINS, A. C. Q.; VINSON, C. C.; SANTOS, C. M. R.; BONFIM, O.; TOGAWA, R. C.; SARAIVA, M. A. P.; BERTIOLI, D. J.; GUIMARAES, P. M. Transcriptome profiling of wild Arachis from water-limited environments uncovers drought tolerance candidate genes. Plant Molecular Biology Reporter, v. 33, p. 1876-1892, 2015. Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia; Embrapa Semiárido. |
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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
Biblioteca(s): |
Embrapa Acre. |
Data corrente: |
05/10/2011 |
Data da última atualização: |
06/07/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
OLIVEIRA, M. V. N. d'.; RIBAS, L. A. |
Afiliação: |
MARCUS VINICIO NEVES D OLIVEIRA, CPAF-AC; LUCIANO ARRUDA RIBAS, CPAF-AC. |
Título: |
Forest regeneration in artificial gaps twelve years after canopy opening in Acre State Western Amazon. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Forest Ecology and Management, Amsterdam, v. 261, n. 11, p. 1722-1731, 2011. |
ISSN: |
0378-1127 |
DOI: |
10.1016/j.foreco.2011.01.020 |
Idioma: |
Inglês |
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 |
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. |
Thesagro: |
Floresta tropical; Regeneração natural; Silvicultura. |
Thesaurus NAL: |
Canopy gaps; Forest management; Natural regeneration; Silviculture; Tropical forests. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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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