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 | Acesso ao texto completo restrito à biblioteca da Embrapa Rondônia. Para informações adicionais entre em contato com cpafro.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
26/02/2018 |
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Data da última atualização: |
07/03/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
WADT, L. H. de O.; FAUSTINO, C. L.; STAUDHAMMER, C. L.; KAINER, K. A.; EVANGELISTA, J. S. |
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Afiliação: |
LUCIA HELENA DE OLIVEIRA WADT, CPAF-Rondonia; Camila Lima Faustino, UFAC; Christina Lynn Staudhammer, University of Alabama; Karen A. Kainer, University of Florida; Joziane Silva Evangelista, Bolsista, Gordon and Betty Moore Foundation. |
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Título: |
Primary and secondary dispersal of Bertholletia excelsa: Implications for sustainable harvests. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 415?416, p. 98-105, maio, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
Our study tracked intact whole fruits of the giant, large-seeded tropical tree Bertholletia excelsa for the first time during primary (fruitfall) and secondary mammalian fruit dispersal. The scatterhoarding Dasyprocta spp. is particularly important for B. excelsa, because it disperses and often buries seeds into spatially-scattered caches, facilitating seed germination and early seedling establishment. We asked: (1) Given a short and synchronous fruiting period, what patterns of primary and secondary fruit dispersal emerge? (2) Do rainfall and local vegetation affect dispersal? We monitored date of fruitfall and condition (visibly untouched, gnawed open with some seeds removed, or gnawed, but unopened) of individual fruits from 20 trees over a ∼ 20 ha area, sequentially visiting each study tree on average every 3?4 days. We evaluated potential influences of rainfall and subcanopy vegetation (arboreal, liana, bamboo or herbaceous) on dispersal in four 10 m2 plots established under each tree crown. As expected, primary dispersal was fairly synchronous over an approximately 3-month period. Amount of rainfall in the 5 days previous to fruitfall was the best predictor of primary dispersal. Monitoring revealed that while the 6855 observed fruits were falling, scatterhoarders were removing some to outside the projection of the tree crown (4.1%) and opening a much smaller proportion (0.5%) under mother trees. Approximately one quarter of fruit opening or removal occurred within 5 days of fruitfall. More fruits were opened or removed when subcanopy vegetation had higher bamboo density or lower densities of saplings and trees ? favorable microenvironments where rodents can gnaw fruits while remaining relatively hidden. Humans directly compete with native dispersers/predators for B. excelsa?s seeds traded internationally as Brazil nut, and thus timing and intensity of harvests following fruitfall determines availability of this resource for dispersers. By mid-January when human harvesting typically begins in our study site, 94% of fruits had fallen from the tall trees, and our continuous quantification of disperser activity revealed that 197 fruits (2.9%) or 3341 seeds (assuming an average 17 seeds per fruit) were consumed or dispersed. Thus, human harvesters could safely collect and dispersers had weeks of unlimited resource access. Considering our dispersal findings, cumulative research results and collective understanding of the Bertholletia-Dasyprocta-Homo sapiens interactions, harvests in our study site and region boost incomes and likely do not threaten Brazil nut recruitment or maintenance of agouti populations. MenosOur study tracked intact whole fruits of the giant, large-seeded tropical tree Bertholletia excelsa for the first time during primary (fruitfall) and secondary mammalian fruit dispersal. The scatterhoarding Dasyprocta spp. is particularly important for B. excelsa, because it disperses and often buries seeds into spatially-scattered caches, facilitating seed germination and early seedling establishment. We asked: (1) Given a short and synchronous fruiting period, what patterns of primary and secondary fruit dispersal emerge? (2) Do rainfall and local vegetation affect dispersal? We monitored date of fruitfall and condition (visibly untouched, gnawed open with some seeds removed, or gnawed, but unopened) of individual fruits from 20 trees over a ∼ 20 ha area, sequentially visiting each study tree on average every 3?4 days. We evaluated potential influences of rainfall and subcanopy vegetation (arboreal, liana, bamboo or herbaceous) on dispersal in four 10 m2 plots established under each tree crown. As expected, primary dispersal was fairly synchronous over an approximately 3-month period. Amount of rainfall in the 5 days previous to fruitfall was the best predictor of primary dispersal. Monitoring revealed that while the 6855 observed fruits were falling, scatterhoarders were removing some to outside the projection of the tree crown (4.1%) and opening a much smaller proportion (0.5%) under mother trees. Approximately one quarter of fruit opening or removal occurred withi... Mostrar Tudo |
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Palavras-Chave: |
Brazil nut; Castanha do brasil; Frugivory; Mamíferos dispersores; Mammalian dispersers; Predador de sementes; Scatterhoard; Seed predator. |
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Thesagro: |
Castanha do Para. |
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Thesaurus Nal: |
Dasyprocta. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 03524naa a2200289 a 4500
001 2088183
005 2022-03-07
008 2018 bl uuuu u00u1 u #d
100 1 $aWADT, L. H. de O.
245 $aPrimary and secondary dispersal of Bertholletia excelsa$bImplications for sustainable harvests.$h[electronic resource]
260 $c2018
520 $aOur study tracked intact whole fruits of the giant, large-seeded tropical tree Bertholletia excelsa for the first time during primary (fruitfall) and secondary mammalian fruit dispersal. The scatterhoarding Dasyprocta spp. is particularly important for B. excelsa, because it disperses and often buries seeds into spatially-scattered caches, facilitating seed germination and early seedling establishment. We asked: (1) Given a short and synchronous fruiting period, what patterns of primary and secondary fruit dispersal emerge? (2) Do rainfall and local vegetation affect dispersal? We monitored date of fruitfall and condition (visibly untouched, gnawed open with some seeds removed, or gnawed, but unopened) of individual fruits from 20 trees over a ∼ 20 ha area, sequentially visiting each study tree on average every 3?4 days. We evaluated potential influences of rainfall and subcanopy vegetation (arboreal, liana, bamboo or herbaceous) on dispersal in four 10 m2 plots established under each tree crown. As expected, primary dispersal was fairly synchronous over an approximately 3-month period. Amount of rainfall in the 5 days previous to fruitfall was the best predictor of primary dispersal. Monitoring revealed that while the 6855 observed fruits were falling, scatterhoarders were removing some to outside the projection of the tree crown (4.1%) and opening a much smaller proportion (0.5%) under mother trees. Approximately one quarter of fruit opening or removal occurred within 5 days of fruitfall. More fruits were opened or removed when subcanopy vegetation had higher bamboo density or lower densities of saplings and trees ? favorable microenvironments where rodents can gnaw fruits while remaining relatively hidden. Humans directly compete with native dispersers/predators for B. excelsa?s seeds traded internationally as Brazil nut, and thus timing and intensity of harvests following fruitfall determines availability of this resource for dispersers. By mid-January when human harvesting typically begins in our study site, 94% of fruits had fallen from the tall trees, and our continuous quantification of disperser activity revealed that 197 fruits (2.9%) or 3341 seeds (assuming an average 17 seeds per fruit) were consumed or dispersed. Thus, human harvesters could safely collect and dispersers had weeks of unlimited resource access. Considering our dispersal findings, cumulative research results and collective understanding of the Bertholletia-Dasyprocta-Homo sapiens interactions, harvests in our study site and region boost incomes and likely do not threaten Brazil nut recruitment or maintenance of agouti populations.
650 $aDasyprocta
650 $aCastanha do Para
653 $aBrazil nut
653 $aCastanha do brasil
653 $aFrugivory
653 $aMamíferos dispersores
653 $aMammalian dispersers
653 $aPredador de sementes
653 $aScatterhoard
653 $aSeed predator
700 1 $aFAUSTINO, C. L.
700 1 $aSTAUDHAMMER, C. L.
700 1 $aKAINER, K. A.
700 1 $aEVANGELISTA, J. S.
773 $tForest Ecology and Management$gv. 415?416, p. 98-105, maio, 2018.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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| Registros recuperados : 8 | |
| 1. |  | DANTAS, A. C. de M.; BONETI, J. I.; NODARI, R. O.; GUERRA, M. P. Embryo rescue from interspecific crosses in apple rootstocks. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 41, n. 6, p. 969-973, jun. 2006 Título em português: Resgate de embriões a partir de cruzamentos interespecíficos em porta-enxerto de macieira.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 4. | | ALBUQUERQUE JUNIOR, C. L. de; DENARDI, F.; DANTAS, A. C. de M.; NODARI, R. O. Desenvolvimento de tubos polínicos em cruzamentos entre cultivares brasileiras de macieira. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 45, n. 11, p. 1324-1327, nov. 2010 Notas Científicas. Título em inglês: Pollen tube development of crosses among Brazilian apple cultivars.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 5. | | GIARETTA, D. R.; BOGO, A.; COELHO, C. M. M.; GUIDOLIN, A. F.; DANTAS, A. C. de M.; GOMES, E. A. ITS-rDNA phylogeny of Colletotrichum spp. causal agent of apple glomerella leaf spot. Ciência Rural, Santa Maria, v. 40, n. 4, p. 806-812, abr. 2010.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 6. | | PEREIRA, J. E. S.; FRANÇA, R. B. de; DANTAS, A. C. de M.; FORTES, G. R. de L. Influência do número de gemas, presença ou ausência de folhas e posição do explante na multiplicação in vitro da batata. Horticultura Brasileira, Vitória da Conquista, v. 23, n. 1, p. 86-89, jan./mar. 2005.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - B |
| Biblioteca(s): Embrapa Acre; Embrapa Recursos Genéticos e Biotecnologia. |
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| 7. | | DANTAS, A. C. de M.; FORTES, G. R. de L.; SILVA, J. B.; NEZI, A. N.; RODRIGUES, A. C. Tolerância ao alumínio em porta-enxertos somaclonais de macieira cultivados em solução nutritiva. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 36, n. 4, p. 615-623, abr. 2001 Título em inglês: Tolerance to aluminium in apple rootstocks somaclones in nutrient solution.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 8. | | JUNKES, C. F. de O.; NICKEL, O.; ECKERT, C.; FAJARDO, T. V. M.; VANNI, M. F.; ARAGAO, F. J. L.; DANTAS, A. C. de M.; PETERS, J. A. Clonagem de construto de RNA interferente para produção de Maruba-Kaido resistente a vírus de macieira. In: SIMPÓSIO BRAILEIRO DE MICROBIOLOGIA APLICADA, 6.; ENCONTRO LATINO-AMERICANO DE MICROBIOLOGIA APLICADA, 2., 2012, Porto Alegre. Anais... Porto Alegre: UFRGS, 2012. p. 14-19. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| Registros recuperados : 8 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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