Seeds Dispersal
Mostrando 13-24 de 65 artigos, teses e dissertações.
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13. Ecological aspects of Langsdorffia hypogaea (Balanophoraceae) parasitism in the Pantanal wetlands
Most studies on holoparasitic plants have focused on taxonomic or systematic issues. The objective of this study was to examine the ecological aspects of parasitism of Langsdorffia hypogaea (Balanophoraceae) in the Pantanal wetlands. Individuals of L. hypogaea were dug out by hand and the host trees were identified. Eighty-eight percent of host trees exhibit
Acta Bot. Bras.. Publicado em: 2015-12
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14. Dispersión de semillas de Mauritia flexuosa (Arecaceae) por frugívoros terrestres en Laguna Azul, Beni, Bolivia
Scatterhoarding has received special attention for the last couple of decades, and several studies focused on palms whose seeds are dispersed by Dasyprocta. Our objective was to know the species that consume fruits of Mauritia flexuosa, to evaluate the relative importance of consumer species, and also to assess the fate of dispersed seeds. Using field experi
Acta Amaz.. Publicado em: 2015-03
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15. Host specificity and experimental assessment of the early establishment of the mistletoe Phoradendron crassifolium (Pohl ex DC.) Eichler (Santalaceae) in a fragment of Atlantic Forest in southeast Brazil
Mistletoe establishment relies heavily on a seed reaching a proper host plant. Small frugivorous birds usually disperse large numbers of mistletoe seeds. However, in the field, mistletoes are absent from some potential available hosts. We investigated whether the mistletoe Phoradendron crassifolium has some preferences for specific host trees in a fragment o
Acta Bot. Bras.. Publicado em: 2014-12
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16. Pre-dispersal seed predation and abortion in species of Callisthene and Qualea (Vochysiaceae) in a Neotropical savanna
The ability of plants to generate fertile offspring is influenced by morpho-physiological and ecological factors. Hence, reproductive success is directly linked to factors affecting quantity and quality of their progeny. In the Cerrado (savanna) of Brazil, the Vochysiaceae is a widely distributed and ecologically important family. Factors affecting pre-dispe
Acta Bot. Bras.. Publicado em: 2014-09
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17. Partitioning of seed dispersal services between birds and bats in a fragment of the Brazilian Atlantic Forest
Community-level network studies suggest that seed dispersal networks may share some universal properties with other complex systems. However, most of the datasets used so far in those studies have been strongly biased towards temperate birds, including not only dispersers, but also seed predators. Recent evidence from multi-taxon networks suggests that seed
Zoologia (Curitiba). Publicado em: 2014-06
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18. Seed rain in areas with and without bamboo dominance within an urban fragment of the Atlantic Forest
Understanding the flow of diaspores is fundamental for determining plant population dynamics in a particular habitat, and a lack of seeds is a limiting factor in forest regeneration, especially in isolated forest fragments. Bamboo dominance affects forest structure and dynamics by suppressing or delaying the recruitment of and colonization by tree species as
Acta Bot. Bras.. Publicado em: 2014-03
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19. Reprodução, distribuição e padrões de co-ocorrência em uma comunidade de palmeiras na Amazônia central: Uma abordagem teórica e experimental / Main drivers controlling reproduction, distribution and co-occurrence patterns in a palm community in a terra firme Forest at central Amazonia: A theoretical and experimental approach
One of the main concerns of community ecology is to determine which factors affect species distribution. Starting from the premise that fruit production is the last step of true establishment, we match environmental gradients and the experimental approaches with help from phylogenetic tools to bring light into the mechanisms influencing palm distribution pat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2012
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20. A fragmentação florestal e a interação entre formigas e diásporos carnosos na floresta Atlântica / Forest fragmentation and the interaction between ants and fleshy diaspores in the Atlantic forest
Em florestas tropicais, formigas de folhiço são freqüentemente vistas em interação com diásporos vegetais (frutos e sementes). Em alguns casos, esta interação oportunista resulta em um mutualismo. Enquanto formigas se beneficiam ao alimentar-se de partes carnosas nutritivas (i.e., polpa, arilo), elas podem beneficiar a semente, por exemplo, ao aument
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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21. Dispersal Syndromes of fossil Seeds from the Lower Permian of Paraná Basin, Rio Grande do Sul, Brazil
A Análise morfológica das sementes tem sido um importante objeto em estudos ecológicos modernos, uma vez que fornece evidências sobre a biologia e as adaptações das plantas-mãe de sementes. Entretanto, este tipo de estudo tem sido restrito a ecologia de plantas modernas e é raramente utilizado em interpretações de dados paleozóicos. A partir do en
Anais da Academia Brasileira de Ciências. Publicado em: 2012-03
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22. A influência de uma espécie exótica invasora, Artocarpus heterophyllus Lam. (jaqueira), sobre uma comunidade de pequenos mamíferos e sua interferência na dinâmica de dispersão de sementes nativas / The influence of an invasive alien species, Artocarpus heterophyllus Lamk. (jack fruit), about a community of small mammals and their influence on the dynamics of dispersal of native seeds
Atualmente, sabe-se que danos causados por espécies exóticas invasoras são umas das principais causas de extinção de espécies, afetando mais seriamente espécies que evoluíram em ilhas. A jaqueira, Artocarpus heterophyllus Lamarck (Moraceae) é originária das florestas tropicais da Índia. Foi introduzida no Brasil ainda no período Colonial e atualm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/07/2011
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23. Relocation of Croton sonderianus (Euphorbiaceae) seeds by Pheidole fallax Mayr (Formicidae): a case of post-dispersal seed protection by ants?
Although seed dispersal by ants might reduce seed predation near the parent plants, predation on discarded seeds clustered on nest refuse piles may reduce any initial benefit provided by seed removal. Here we examine the fate of Croton sonderianus seeds that were discarded by Pheidole fallax Mayr ants on their nest refuses in caatinga vegetation of northeast
Neotropical Entomology. Publicado em: 2011-08
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24. The role of seed mass on the caching decision by agoutis, Dasyprocta leporina (Rodentia: Agoutidae)
It has been shown that the local extinction of large-bodied frugivores may cause cascading consequences for plant recruitment and overall plant diversity. However, to what extent the resilient mammals can compensate the role of seed dispersal in defaunated sites is poorly understood. Caviomorph rodents, especially Dasyprocta spp., are usually resilient frugi
Zoologia (Curitiba). Publicado em: 2010-06