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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
10/07/2017 |
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Data da última atualização: |
11/07/2017 |
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Autoria: |
CAMPOS, B. P. F.; SILVA, G. F. da; BREDA BINOTI, D. H. B.; MENDONÇA, A. R. de; LEITE, H. G. |
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Título: |
Descrição do perfil do tronco de árvores em plantios de diferentes espécies por meio de redes neurais artificiais. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Pesquisa Florestal Brasileira, Colombo, v. 37, n. 90, p. 99-107, abr./jun. 2017. |
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DOI: |
10.4336/2017.pfb.37.90.1181 |
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Idioma: |
Português |
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Conteúdo: |
O objetivo deste trabalho foi analisar a capacidade de uma rede neural artificial (RNA) em descrever o perfil do fuste de árvores de diferentes gêneros e espécies em diferentes condições de crescimento. Para fins comparativos, foram ajustadas equações, empregando-se análise de regressão, para descrever o perfil do tronco. Tanto para as redes neurais quanto para as equações de regressão, a avaliação da acurácia foi realizada com base no coeficiente de correlação entre os diâmetros observados e estimados ao longo do fuste, a raiz quadrada do erro quadrático médio percentual (RMSE) e análise gráfica. Os métodos de inteligência artificial, especialmente RNA, podem ser eficazes em descrever o perfil do fuste de árvores de diferentes espécies em diferentes condições de crescimento, utilizando apenas uma RNA, com eficiência semelhante aos modelos de regressão tradicionalmente empregados por empresas florestais. |
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Palavras-Chave: |
Inteligência artificial; Manejo florestal. |
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Thesagro: |
Inventário Florestal. |
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Thesaurus Nal: |
artificial intelligence; forest inventory; forest management. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/161595/1/PFB-2.pdf
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Marc: |
LEADER 01799naa a2200253 a 4500
001 2072381
005 2017-07-11
008 2017 bl uuuu u00u1 u #d
024 7 $a10.4336/2017.pfb.37.90.1181$2DOI
100 1 $aCAMPOS, B. P. F.
245 $aDescrição do perfil do tronco de árvores em plantios de diferentes espécies por meio de redes neurais artificiais.$h[electronic resource]
260 $c2017
520 $aO objetivo deste trabalho foi analisar a capacidade de uma rede neural artificial (RNA) em descrever o perfil do fuste de árvores de diferentes gêneros e espécies em diferentes condições de crescimento. Para fins comparativos, foram ajustadas equações, empregando-se análise de regressão, para descrever o perfil do tronco. Tanto para as redes neurais quanto para as equações de regressão, a avaliação da acurácia foi realizada com base no coeficiente de correlação entre os diâmetros observados e estimados ao longo do fuste, a raiz quadrada do erro quadrático médio percentual (RMSE) e análise gráfica. Os métodos de inteligência artificial, especialmente RNA, podem ser eficazes em descrever o perfil do fuste de árvores de diferentes espécies em diferentes condições de crescimento, utilizando apenas uma RNA, com eficiência semelhante aos modelos de regressão tradicionalmente empregados por empresas florestais.
650 $aartificial intelligence
650 $aforest inventory
650 $aforest management
650 $aInventário Florestal
653 $aInteligência artificial
653 $aManejo florestal
700 1 $aSILVA, G. F. da
700 1 $aBREDA BINOTI, D. H. B.
700 1 $aMENDONÇA, A. R. de
700 1 $aLEITE, H. G.
773 $tPesquisa Florestal Brasileira, Colombo$gv. 37, n. 90, p. 99-107, abr./jun. 2017.
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Registro original: |
Embrapa Florestas (CNPF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
28/06/2018 |
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Data da última atualização: |
22/11/2018 |
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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: |
CAMPBELL, A. J.; CARVALHEIRO, L. G.; MAUES, M. M.; JAFFÉ, R.; GIANNINI, T. C.; FREITAS, M. A. B.; COELHO, B. W. T.; MENEZES, C. |
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Afiliação: |
Alistair John Campbell, CPATU/UFPA; Luísa Gigante Carvalheiro, UNB / Universidade de Lisboa; MARCIA MOTTA MAUES, CPATU; Rodolfo Jaffé, Instituto Tecnológico Vale; Tereza Cristina Giannini, Instituto Tecnológico Vale; Madson Antonio Benjamin Freitas, UFPE; Beatriz Woiski Texeira Coelho, MPEG; CRISTIANO MENEZES, CPATU. |
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Título: |
Anthropogenic disturbance of tropical forests threatens pollination services to açaí palm in the Amazon river delta. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Journal of Applied Ecology, v. 55, n. 4, p. 1725-1736, July 2018. |
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DOI: |
10.1111/1365-2664.13086 |
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Idioma: |
Inglês |
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Conteúdo: |
The açaí palm Euterpe oleracea Mart. in the Amazon river delta has seen rapid expansion to meet increased demand for its fruit. This has been achieved by transforming lowland forest habitats (floodplains) into simplified agroforests and intensive plantation in upland areas. As açaí palm makes an important contribution to the economy and food security of local communities, identifying management approaches that support biodiversity and ecosystem processes that underpin fruit production on açaí farms is essential. We compared flower?visitor communities and açaí fruit production in floodplain forests and upland plantations, across gradients of local management intensity (i.e. açaí density per ha) and surrounding forest cover. The relative contribution of biotic pollination and degree of pollen limitation were assessed using insect exclusion and hand?pollination experiments. We found that açaí flower visitors are highly diverse (c. 200 distinct taxa) and had variable responses to disturbance. Bee visitation was higher in floodplains and positively related to surrounding forest cover, but other flower visitors, including specialised curculionid beetles, were unresponsive to changes in surrounding forest cover. However, intensive management practices (i.e. high açaí palm densities) in floodplains and uplands had contrasting effects on flower?visitor communities, with flower?visitor richness being lower on intensively managed floodplain farms and ant densities being higher on intensive upland farms. Pollination experiments revealed açaí palm to be highly dependent on biotic pollination. Fruit set in open?pollinated inflorescences was positively related to flower?visitor richness and specialised curculionid beetle visitation, whereas the presence of ants on inflorescences had a negative effect. Synthesis and applications. Our study shows that pollinators are essential for açaí fruit production, but that intensive farming practices have eroded the relationship between surrounding forest cover and ecosystem function in floodplains (i.e. conversion of native forest into simplified agroforests) and increased the frequency of antagonistic interactions in uplands (e.g. high ant densities). These findings underline the value of extensive management practices, such as the maintenance of other tree species within farms and adjacent unmanaged forest patches, to ensure the long?term sustainability of açaí fruit production in the Amazon river delta. MenosThe açaí palm Euterpe oleracea Mart. in the Amazon river delta has seen rapid expansion to meet increased demand for its fruit. This has been achieved by transforming lowland forest habitats (floodplains) into simplified agroforests and intensive plantation in upland areas. As açaí palm makes an important contribution to the economy and food security of local communities, identifying management approaches that support biodiversity and ecosystem processes that underpin fruit production on açaí farms is essential. We compared flower?visitor communities and açaí fruit production in floodplain forests and upland plantations, across gradients of local management intensity (i.e. açaí density per ha) and surrounding forest cover. The relative contribution of biotic pollination and degree of pollen limitation were assessed using insect exclusion and hand?pollination experiments. We found that açaí flower visitors are highly diverse (c. 200 distinct taxa) and had variable responses to disturbance. Bee visitation was higher in floodplains and positively related to surrounding forest cover, but other flower visitors, including specialised curculionid beetles, were unresponsive to changes in surrounding forest cover. However, intensive management practices (i.e. high açaí palm densities) in floodplains and uplands had contrasting effects on flower?visitor communities, with flower?visitor richness being lower on intensively managed floodplain farms and ant densities being higher on inten... Mostrar Tudo |
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Thesagro: |
Açaí; Euterpe Oleracea; Floresta; Floresta Tropical; Polinização. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03333naa a2200277 a 4500
001 2092910
005 2018-11-22
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1111/1365-2664.13086$2DOI
100 1 $aCAMPBELL, A. J.
245 $aAnthropogenic disturbance of tropical forests threatens pollination services to açaí palm in the Amazon river delta.$h[electronic resource]
260 $c2018
520 $aThe açaí palm Euterpe oleracea Mart. in the Amazon river delta has seen rapid expansion to meet increased demand for its fruit. This has been achieved by transforming lowland forest habitats (floodplains) into simplified agroforests and intensive plantation in upland areas. As açaí palm makes an important contribution to the economy and food security of local communities, identifying management approaches that support biodiversity and ecosystem processes that underpin fruit production on açaí farms is essential. We compared flower?visitor communities and açaí fruit production in floodplain forests and upland plantations, across gradients of local management intensity (i.e. açaí density per ha) and surrounding forest cover. The relative contribution of biotic pollination and degree of pollen limitation were assessed using insect exclusion and hand?pollination experiments. We found that açaí flower visitors are highly diverse (c. 200 distinct taxa) and had variable responses to disturbance. Bee visitation was higher in floodplains and positively related to surrounding forest cover, but other flower visitors, including specialised curculionid beetles, were unresponsive to changes in surrounding forest cover. However, intensive management practices (i.e. high açaí palm densities) in floodplains and uplands had contrasting effects on flower?visitor communities, with flower?visitor richness being lower on intensively managed floodplain farms and ant densities being higher on intensive upland farms. Pollination experiments revealed açaí palm to be highly dependent on biotic pollination. Fruit set in open?pollinated inflorescences was positively related to flower?visitor richness and specialised curculionid beetle visitation, whereas the presence of ants on inflorescences had a negative effect. Synthesis and applications. Our study shows that pollinators are essential for açaí fruit production, but that intensive farming practices have eroded the relationship between surrounding forest cover and ecosystem function in floodplains (i.e. conversion of native forest into simplified agroforests) and increased the frequency of antagonistic interactions in uplands (e.g. high ant densities). These findings underline the value of extensive management practices, such as the maintenance of other tree species within farms and adjacent unmanaged forest patches, to ensure the long?term sustainability of açaí fruit production in the Amazon river delta.
650 $aAçaí
650 $aEuterpe Oleracea
650 $aFloresta
650 $aFloresta Tropical
650 $aPolinização
700 1 $aCARVALHEIRO, L. G.
700 1 $aMAUES, M. M.
700 1 $aJAFFÉ, R.
700 1 $aGIANNINI, T. C.
700 1 $aFREITAS, M. A. B.
700 1 $aCOELHO, B. W. T.
700 1 $aMENEZES, C.
773 $tJournal of Applied Ecology$gv. 55, n. 4, p. 1725-1736, July 2018.
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