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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
23/01/2020 |
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Data da última atualização: |
06/08/2020 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
PAIVA, P. M. V. de. |
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Afiliação: |
PAULO MARCELO VERAS DE PAIVA, CPAF-AP. |
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Título: |
Threatened by conservation: addressing policy gaps for the maintenance of high-density Brazil nut tree clumps. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Pesquisa Florestal Brasileira, v. 39, e201902043, p. 47-48, 2019. |
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Idioma: |
Inglês |
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Notas: |
Edição especial dos resumos do IUFRO World Congress, 25., 2019, Curitiba. |
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Conteúdo: |
Considered a cornerstone species in Amazonian forest conservation strategies, the Brazil nut enjoys a unique status. It is immune to cutting and most of its distribution is under some category of protected area. Nonetheless, both nut-gatherers and researchers consistently report insufficient natural regeneration levels and the population decline of high-density stands, including at strict nature reserves. The initial hypothesis of seed overharvesting lacks consensus as later studies identified the scarcity of canopy gaps at mature forests as the main cause for the recruitment failure of this gap-loving species. This observation supports the anthropogenic origin hypothesis and is consistent with the abundant recruitment observed in traditional swiddens, where the regeneration density increases with the number of cultivation cycles. This is due to a number of factors, including the scatterhoarder habit of the natural disperser, gap-clearance frequency, species? resistance to fire and remarkable re-sprouting capability. Nut-gatherers intuitively understand the role of swiddens for the maintenance and expansion of high-density Brazil nut stands, and many voluntarily protect their spontaneously enriched fallows from further cultivation cycles. Surprisingly, the very conservation policies end up hindering such traditional management practices. For example, when forbidding nutgatherers/swidden-farmers from clearing new plots of forest in exchange for those fallows they chose to protect. Expensive, labor-intensive and unpopular recommendations like enrichment planting are puny alternatives for what the ubiquitous swiddens can do, provided revised policies allow them to. Failing that, densities of senescent Brazil nut stands will continue to decrease until hardly justifying the ?sustainable alternative to deforestation? discourse. MenosConsidered a cornerstone species in Amazonian forest conservation strategies, the Brazil nut enjoys a unique status. It is immune to cutting and most of its distribution is under some category of protected area. Nonetheless, both nut-gatherers and researchers consistently report insufficient natural regeneration levels and the population decline of high-density stands, including at strict nature reserves. The initial hypothesis of seed overharvesting lacks consensus as later studies identified the scarcity of canopy gaps at mature forests as the main cause for the recruitment failure of this gap-loving species. This observation supports the anthropogenic origin hypothesis and is consistent with the abundant recruitment observed in traditional swiddens, where the regeneration density increases with the number of cultivation cycles. This is due to a number of factors, including the scatterhoarder habit of the natural disperser, gap-clearance frequency, species? resistance to fire and remarkable re-sprouting capability. Nut-gatherers intuitively understand the role of swiddens for the maintenance and expansion of high-density Brazil nut stands, and many voluntarily protect their spontaneously enriched fallows from further cultivation cycles. Surprisingly, the very conservation policies end up hindering such traditional management practices. For example, when forbidding nutgatherers/swidden-farmers from clearing new plots of forest in exchange for those fallows they chose to pro... Mostrar Tudo |
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Thesagro: |
Castanha; Regeneração Natural. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/209541/1/CPAF-AP-2019-Threatened-by-conservation-addressing-policy.pdf
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Marc: |
LEADER 02413nam a2200145 a 4500
001 2119290
005 2020-08-06
008 2019 bl uuuu u00u1 u #d
100 1 $aPAIVA, P. M. V. de
245 $aThreatened by conservation$baddressing policy gaps for the maintenance of high-density Brazil nut tree clumps.$h[electronic resource]
260 $aPesquisa Florestal Brasileira, v. 39, e201902043, p. 47-48$c2019
500 $aEdição especial dos resumos do IUFRO World Congress, 25., 2019, Curitiba.
520 $aConsidered a cornerstone species in Amazonian forest conservation strategies, the Brazil nut enjoys a unique status. It is immune to cutting and most of its distribution is under some category of protected area. Nonetheless, both nut-gatherers and researchers consistently report insufficient natural regeneration levels and the population decline of high-density stands, including at strict nature reserves. The initial hypothesis of seed overharvesting lacks consensus as later studies identified the scarcity of canopy gaps at mature forests as the main cause for the recruitment failure of this gap-loving species. This observation supports the anthropogenic origin hypothesis and is consistent with the abundant recruitment observed in traditional swiddens, where the regeneration density increases with the number of cultivation cycles. This is due to a number of factors, including the scatterhoarder habit of the natural disperser, gap-clearance frequency, species? resistance to fire and remarkable re-sprouting capability. Nut-gatherers intuitively understand the role of swiddens for the maintenance and expansion of high-density Brazil nut stands, and many voluntarily protect their spontaneously enriched fallows from further cultivation cycles. Surprisingly, the very conservation policies end up hindering such traditional management practices. For example, when forbidding nutgatherers/swidden-farmers from clearing new plots of forest in exchange for those fallows they chose to protect. Expensive, labor-intensive and unpopular recommendations like enrichment planting are puny alternatives for what the ubiquitous swiddens can do, provided revised policies allow them to. Failing that, densities of senescent Brazil nut stands will continue to decrease until hardly justifying the ?sustainable alternative to deforestation? discourse.
650 $aCastanha
650 $aRegeneração Natural
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Embrapa Amapá (CPAF-AP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Café. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
25/06/2019 |
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Data da última atualização: |
25/06/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ANGELO, P. C. da S.; FERREIRA, I. B.; CARVALHO, C. H. S. de; MATIELLO, J. B.; SERA, G. H. |
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Afiliação: |
PAULA CRISTINA DA SILVA ANGELO, CNPCa; Iran Bueno Ferreira, Fundação Procafé Alameda do Café; CARLOS HENRIQUE S DE CARVALHO, CNPCa; José Braz Matiello, Fundação Procafé; Gustavo Hiroshi Sera, Instituto Agronômico do Paraná - IAPAR. |
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Título: |
Arabica coffee fruits phenology assessed through degree days, precipitation, and solar radiation exposure on a daily basis. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
International Journal of Biometeorology, v. 63, n. 7, p. 831-843, 2019 |
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Idioma: |
Inglês |
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Conteúdo: |
Knowledge regarding reproductive cycle duration is important in terms of scheduling harvests and estimating coffee cultivars adaptability. Nine Coffea arabica cultivars were evaluated during two successive reproductive cycles. Dates of occurrence of the major blossoms, and the green and ripe fruits, on 64 branches for each cultivar, were registered during each reproductive cycle. These dates were used to calculate the duration of the fruit development (blossom to green) and ripening (green to ripe) phases, the quantities of degree days, precipitation, and solar radiation accumulated throughout each phase, and also degree days, precipitation, and radiation on a daily basis, all of which are novelties in coffee research. The differences between cultivars and reproductive cycles were tested by ANOVA. Cultivars were grouped in clusters according to the above-cited variables. Principally, the daily quantities of degree days and precipitation determined the differences between reproductive cycles and coffee cultivars during development phases. Early and very early cultivars accumulated high numbers of degree days.day?1, in periods of relatively good water availability, with high exposure to solar radiation. Late cultivars accumulated less degree days.day?1 and were exposed to lower amounts of daily solar radiation and longer periods of water scarcity. Regarding the fruit ripening phase, cultivars were principally distinguished by degree days and solar radiation on a daily basis. Two of the coffee cultivars were classified or confirmed as early and very early and another three as late and very late. One cultivar, Siriema, displayed an interesting conjugation of early and intermediate characteristics. MenosKnowledge regarding reproductive cycle duration is important in terms of scheduling harvests and estimating coffee cultivars adaptability. Nine Coffea arabica cultivars were evaluated during two successive reproductive cycles. Dates of occurrence of the major blossoms, and the green and ripe fruits, on 64 branches for each cultivar, were registered during each reproductive cycle. These dates were used to calculate the duration of the fruit development (blossom to green) and ripening (green to ripe) phases, the quantities of degree days, precipitation, and solar radiation accumulated throughout each phase, and also degree days, precipitation, and radiation on a daily basis, all of which are novelties in coffee research. The differences between cultivars and reproductive cycles were tested by ANOVA. Cultivars were grouped in clusters according to the above-cited variables. Principally, the daily quantities of degree days and precipitation determined the differences between reproductive cycles and coffee cultivars during development phases. Early and very early cultivars accumulated high numbers of degree days.day?1, in periods of relatively good water availability, with high exposure to solar radiation. Late cultivars accumulated less degree days.day?1 and were exposed to lower amounts of daily solar radiation and longer periods of water scarcity. Regarding the fruit ripening phase, cultivars were principally distinguished by degree days and solar radiation on a daily basis. T... Mostrar Tudo |
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Palavras-Chave: |
Adaptability; Fruit maturation; Thermal time. |
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Thesaurus NAL: |
Flowering. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02415naa a2200217 a 4500
001 2110068
005 2019-06-25
008 2019 bl uuuu u00u1 u #d
100 1 $aANGELO, P. C. da S.
245 $aArabica coffee fruits phenology assessed through degree days, precipitation, and solar radiation exposure on a daily basis.$h[electronic resource]
260 $c2019
520 $aKnowledge regarding reproductive cycle duration is important in terms of scheduling harvests and estimating coffee cultivars adaptability. Nine Coffea arabica cultivars were evaluated during two successive reproductive cycles. Dates of occurrence of the major blossoms, and the green and ripe fruits, on 64 branches for each cultivar, were registered during each reproductive cycle. These dates were used to calculate the duration of the fruit development (blossom to green) and ripening (green to ripe) phases, the quantities of degree days, precipitation, and solar radiation accumulated throughout each phase, and also degree days, precipitation, and radiation on a daily basis, all of which are novelties in coffee research. The differences between cultivars and reproductive cycles were tested by ANOVA. Cultivars were grouped in clusters according to the above-cited variables. Principally, the daily quantities of degree days and precipitation determined the differences between reproductive cycles and coffee cultivars during development phases. Early and very early cultivars accumulated high numbers of degree days.day?1, in periods of relatively good water availability, with high exposure to solar radiation. Late cultivars accumulated less degree days.day?1 and were exposed to lower amounts of daily solar radiation and longer periods of water scarcity. Regarding the fruit ripening phase, cultivars were principally distinguished by degree days and solar radiation on a daily basis. Two of the coffee cultivars were classified or confirmed as early and very early and another three as late and very late. One cultivar, Siriema, displayed an interesting conjugation of early and intermediate characteristics.
650 $aFlowering
653 $aAdaptability
653 $aFruit maturation
653 $aThermal time
700 1 $aFERREIRA, I. B.
700 1 $aCARVALHO, C. H. S. de
700 1 $aMATIELLO, J. B.
700 1 $aSERA, G. H.
773 $tInternational Journal of Biometeorology$gv. 63, n. 7, p. 831-843, 2019
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