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Registro Completo |
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
29/05/2008 |
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Data da última atualização: |
26/08/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
WADT, L. H. de O.; KAINER, K. A.; STAUDHAMMER, C. L.; SERRANO, R. O. P. |
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Afiliação: |
LUCIA HELENA DE OLIVEIRA WADT, CPAF-AC; Karen A. Kainer, University of Florida; C. L. Staudhammer, University of Florida; Rodrigo O. P. Serrano, Universidade Federal do Acre (Ufac). |
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Título: |
Sustainable forest use in Brazilian extractive reserves: natural regeneration of Brazil nut in exploited populations. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Biological Conservation, v. 141, n. 1, p. 332-346, Jan. 2008. |
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ISSN: |
0006-3207 |
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DOI: |
10.1016/j.biocon.2007.10.007 |
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Idioma: |
Inglês |
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Conteúdo: |
The emergence of Brazilian extractive reserves reinforced the notion that sustainable forest use could play a central role in conservation. Brazil nut is considered a model non-timber product for promoting conservation through use. Demographic studies, however, have demonstrated differential impacts of nut harvest on Brazil nut population structure. Comparing three populations with different forest use histories, degrees of road access, and recent levels of nut harvest, we asked: (1) Are they exhibiting regeneration failure? and (2) Are seedling/sapling densities explained by adult Brazil nut structure, fruit fate and/or overall forest structure? We installed four 9-ha plots in each site to census Brazil nut trees > 10 cm dbh, and within each plot, 36 subplots (25 × 25 m each) to quantify regeneration, overall forest structure, and open and closed fruit counts. Approximately 29-55% of fruits was unharvested, and more than 90% of these was opened by scatterhoarding dispersers. Population structure approximated a reverse-J size class distribution, with seedling densities varying from 3.2 to 5.8 individuals ha-1. We conclude that within the current harvest context, regeneration is sufficient for population persistence in our sites, at least over the medium term. The socioeconomics of sustainably managing Brazil nut is the greater challenge, involving interlinked competitive land uses, nut quality, and substantial increases in local income from harvest. Some of these challenges are being addressed in Brazil, Bolivia and Peru, providing hope that this cornerstone extractive species will continue to play a prominent role in the ecological and economic landscape of Amazonia. MenosThe emergence of Brazilian extractive reserves reinforced the notion that sustainable forest use could play a central role in conservation. Brazil nut is considered a model non-timber product for promoting conservation through use. Demographic studies, however, have demonstrated differential impacts of nut harvest on Brazil nut population structure. Comparing three populations with different forest use histories, degrees of road access, and recent levels of nut harvest, we asked: (1) Are they exhibiting regeneration failure? and (2) Are seedling/sapling densities explained by adult Brazil nut structure, fruit fate and/or overall forest structure? We installed four 9-ha plots in each site to census Brazil nut trees > 10 cm dbh, and within each plot, 36 subplots (25 × 25 m each) to quantify regeneration, overall forest structure, and open and closed fruit counts. Approximately 29-55% of fruits was unharvested, and more than 90% of these was opened by scatterhoarding dispersers. Population structure approximated a reverse-J size class distribution, with seedling densities varying from 3.2 to 5.8 individuals ha-1. We conclude that within the current harvest context, regeneration is sufficient for population persistence in our sites, at least over the medium term. The socioeconomics of sustainably managing Brazil nut is the greater challenge, involving interlinked competitive land uses, nut quality, and substantial increases in local income from harvest. Some of these challenges ... Mostrar Tudo |
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Palavras-Chave: |
Castanha do brasil; Extractive reserve; Manejo florestal; Nuez del Brasil; Productos forestales no madereros; Produto florestal não madeireiro (PFNM); Regeneración natural; Reserva extractiva; Reserva extrativista; Silvicultura sustentable. |
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Thesagro: |
Bertholletia excelsa; Castanha do pará; Regeneração natural. |
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Thesaurus Nal: |
Brazil nuts; Natural regeneration; Nontimber forest products; Sustainable forestry. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/506234/1/17643.pdf
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Marc: |
LEADER 02949naa a2200385 a 4500
001 1506234
005 2024-08-26
008 2008 bl uuuu u00u1 u #d
022 $a0006-3207
024 7 $a10.1016/j.biocon.2007.10.007$2DOI
100 1 $aWADT, L. H. de O.
245 $aSustainable forest use in Brazilian extractive reserves$bnatural regeneration of Brazil nut in exploited populations.$h[electronic resource]
260 $c2008
520 $aThe emergence of Brazilian extractive reserves reinforced the notion that sustainable forest use could play a central role in conservation. Brazil nut is considered a model non-timber product for promoting conservation through use. Demographic studies, however, have demonstrated differential impacts of nut harvest on Brazil nut population structure. Comparing three populations with different forest use histories, degrees of road access, and recent levels of nut harvest, we asked: (1) Are they exhibiting regeneration failure? and (2) Are seedling/sapling densities explained by adult Brazil nut structure, fruit fate and/or overall forest structure? We installed four 9-ha plots in each site to census Brazil nut trees > 10 cm dbh, and within each plot, 36 subplots (25 × 25 m each) to quantify regeneration, overall forest structure, and open and closed fruit counts. Approximately 29-55% of fruits was unharvested, and more than 90% of these was opened by scatterhoarding dispersers. Population structure approximated a reverse-J size class distribution, with seedling densities varying from 3.2 to 5.8 individuals ha-1. We conclude that within the current harvest context, regeneration is sufficient for population persistence in our sites, at least over the medium term. The socioeconomics of sustainably managing Brazil nut is the greater challenge, involving interlinked competitive land uses, nut quality, and substantial increases in local income from harvest. Some of these challenges are being addressed in Brazil, Bolivia and Peru, providing hope that this cornerstone extractive species will continue to play a prominent role in the ecological and economic landscape of Amazonia.
650 $aBrazil nuts
650 $aNatural regeneration
650 $aNontimber forest products
650 $aSustainable forestry
650 $aBertholletia excelsa
650 $aCastanha do pará
650 $aRegeneração natural
653 $aCastanha do brasil
653 $aExtractive reserve
653 $aManejo florestal
653 $aNuez del Brasil
653 $aProductos forestales no madereros
653 $aProduto florestal não madeireiro (PFNM)
653 $aRegeneración natural
653 $aReserva extractiva
653 $aReserva extrativista
653 $aSilvicultura sustentable
700 1 $aKAINER, K. A.
700 1 $aSTAUDHAMMER, C. L.
700 1 $aSERRANO, R. O. P.
773 $tBiological Conservation$gv. 141, n. 1, p. 332-346, Jan. 2008.
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Registro original: |
Embrapa Acre (CPAF-AC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
02/08/2001 |
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Data da última atualização: |
14/05/2020 |
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Autoria: |
CIRINO, C. G.; GUERRA, H. O. C. |
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Afiliação: |
Cledson Gomes Cirino, Prefeitura Municipal de Campina Grande; Hugo O. Carvalho Guerra, Universidade Federal da Paraíba - UFPB/Departamento de Engenharia Agrícola. |
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Título: |
Utilização das relações energia/umidade na caracterização físico-hídrica dos solos. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 29, n. 12, p. 1973-1978. dez. 1994. |
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Idioma: |
Português |
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Notas: |
Título em inglês: Use of the energy/soil water content relationship for the physical-hydric characterization of soils. |
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Conteúdo: |
Tres solos diferentes (arenoso, barro-argilo-arenoso e argilo-arenoso) foram usados para testar a utilizacao da curva caracteristica de umidade do solo na determinacao de alguns parametros físico-hidricos do solo, importantes no planejamento da irrigacao. Os resultados obtidos desta forma, referentes a cada parametro (porosidade total, porosidade efetiva, capacidade de campo, ponto de murcha permanente e condutividade hidraulica), foram comparados estatisticamente com os obtidos da forma convencional de campo ou laboratorio. Os resultados permitem concluir que o metodo proposto constitui uma confiavel alternativa para a determinacao dos parametros estudados. |
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Palavras-Chave: |
Capacidade de campo; Curva caracteristica de umidade; Prosidade. |
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Thesagro: |
Condutividade Hidráulica; Ponto de Murcha. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/20354/1/pab19_dez_94.pdf
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Marc: |
LEADER 01424naa a2200205 a 4500
001 1105232
005 2020-05-14
008 1994 bl uuuu u00u1 u #d
100 1 $aCIRINO, C. G.
245 $aUtilização das relações energia/umidade na caracterização físico-hídrica dos solos.
260 $c1994
500 $aTítulo em inglês: Use of the energy/soil water content relationship for the physical-hydric characterization of soils.
520 $aTres solos diferentes (arenoso, barro-argilo-arenoso e argilo-arenoso) foram usados para testar a utilizacao da curva caracteristica de umidade do solo na determinacao de alguns parametros físico-hidricos do solo, importantes no planejamento da irrigacao. Os resultados obtidos desta forma, referentes a cada parametro (porosidade total, porosidade efetiva, capacidade de campo, ponto de murcha permanente e condutividade hidraulica), foram comparados estatisticamente com os obtidos da forma convencional de campo ou laboratorio. Os resultados permitem concluir que o metodo proposto constitui uma confiavel alternativa para a determinacao dos parametros estudados.
650 $aCondutividade Hidráulica
650 $aPonto de Murcha
653 $aCapacidade de campo
653 $aCurva caracteristica de umidade
653 $aProsidade
700 1 $aGUERRA, H. O. C.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 29, n. 12, p. 1973-1978. dez. 1994.
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Embrapa Unidades Centrais (AI-SEDE) |
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