Seeds Dispersal
Mostrando 25-36 de 65 artigos, teses e dissertações.
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25. High levels of genetic differentiation and selfing in the Brazilian cerrado fruit tree Dipteryx alata Vog. (Fabaceae)
Dipteryx alata is a native fruit tree species of the cerrado (Brazilian savanna) that has great economic potential because of its multiple uses. Knowledge of how the genetic variability of this species is organized within and among populations would be useful for genetic conservation and breeding programs. We used nine simple sequence repeat (SSR) primers de
Genetics and Molecular Biology. Publicado em: 29/01/2010
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26. História natural da erva-de-passarinho Psittacanthus robustus (Loranthaceae) em uma área de campo rupestre do sudeste brasileiro : interações com hospedeiras, dispersores, polinizadores e insetos herbívoros / Natural history of the mistletoe Psittacanthus robustus (Loranthaceae) at a rupestrian filed site in southeastern Brazil : interactions with hosts, seed dispersers, pollinators and insect herbivores
In this study I investigated some aspects of the natural history of the woody mistletoe Psittacanthus robustus Mart. (Loranthaceae) in rocky outcrops in the Serra do Cipó, southeastern Brazil. This species was recorded parasitizing eight host species in Five families, although trees within Vochysiaceae comprise the main hosts. Pattern of distribution was cl
Publicado em: 2010
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27. Dinâmica populacional e efeitos de variáveis ambientais sobre a fauna de pequenos mamíferos em um fragmento de floresta com araucária no sul do Brasil
Natural populations of small rodents fluctuate continually over time and the population dynamics of any living organism are shaped by both intrinsic and extrinsic factors. Small mammals populations can show a continuum dynamic activity, ranging from stability to regular cycles of variable amplitude. The species dynamics is also known to be influenced by the
Publicado em: 2010
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28. Seed rain in the area of agriculture abandoned near a fragment preserved of caatinga in Pernambuco, Brazil. / Chuva de sementes em área abandonada após cultivo próxima a um fragmento preservado de caatinga em Pernambuco, Brasil
O papel de fragmentos preservados de caatinga na regeneração de um ambiente antropizado foi avaliado em uma área utilizada de agricultura e abandonada há 15 anos. Foram colocados 105 coletores de sementes na área de cultivo abandonado, distribuídos em 5 transectos de 210 m, perpendiculares ao fragmento preservado de caatinga. Coletores foram colocados
Publicado em: 2010
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29. ESTRUTURA GENÉTICA POPULACIONAL E FLUXO GÊNICO EM Dipteryx alata VOGEL (FABACEAE) NO CERRADO / Populational genetic structure and gene flow in Dipteryx alata Vogel (Fabaceae) from Brazilian Cerrado
The goal of this study was to evaluate the genetic structure and the spatial pattern of intra and interpopulational gene flow of Dipteryx alata Vogel, based on nuclear and chloroplastidial microsatellite markers. Primers were developed based on sequencing of random fragments from a shotgun genomic library for detection of microsatellite regions. 12 microsate
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/01/2009
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30. Behavior of tamarins, tanagers and manakins foraging in a strangler fig (Ficus sp.) in Suriname, South America: implications for seed dispersal
The behavior of foragers can directly affect the dispersal of seeds. Strangler figs are keystone resources throughout the tropics and are important resources for both primates and birds. We examined the foraging behavior of golden-handed tamarins and four bird species in a strangler fig to see how these behaviors might affect the dispersal of fig seeds. Tama
Biota Neotropica. Publicado em: 2009-09
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31. Feeding habit of the Brazilian tapir, Tapirus terrestris (Perissodactyla: Tapiridae) in a vegetation transition zone in south-eastern Brazil
Tapirs are considered generalist herbivores and the differences in the proportions of dietary items are often attributed to differences in the habitats where individuals live. This study characterized the feeding habit of Tapirus terrestris (Linnaeus, 1758) in a nature reserve in south-eastern Brazil, located in a region considered a transition zone between
Zoologia (Curitiba). Publicado em: 2009-06
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32. Frugivoria por Tapirus terrestris em três regiões do Pantanal, Brasil
Tapirus terrestris (Linnaeus 1758) is the largest terrestrial Neotropical mammal. Its diet consists of leaves, fruits and buds, and it is able to ingest seeds without damaging them; enhancing, in this way, seed dispersion. The aim of this study was to determine the tapirs diet, evaluate its contribution for seed dispersion and the differences in the composit
Publicado em: 2009
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33. ESTRUTURA GENÉTICA POPULACIONAL E FLUXO GÊNICO EM Dipteryx alata VOGEL (FABACEAE) NO CERRADO / Populational genetic structure and gene flow in Dipteryx alata Vogel (Fabaceae) from Brazilian Cerrado
The goal of this study was to evaluate the genetic structure and the spatial pattern of intra and interpopulational gene flow of Dipteryx alata Vogel, based on nuclear and chloroplastidial microsatellite markers. Primers were developed based on sequencing of random fragments from a shotgun genomic library for detection of microsatellite regions. 12 microsate
Publicado em: 2009
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34. Orchidaceae nativas da região central de São Paulo, Brasil : florística, interação com forófitos, proposta de novas espécies e propagação in vitro de uma espécie ameaçada de extinção / Native Orchidaceae of the central region of São Paulo, Brazil: floristic, interaction nested with host tree, new species proposed and in vitro propagation of threatened of extinction species
Aiming to know the sorts of Orchidaceae of the central region of the State of São Paulo, from 1996 and more intensively from 2005, visits were carried out in 125 forest fragments of 23 local municípios, with weekly periodicity and also, fortnightly. The collect were assistematics, being each fragment visited in the biggest number of points. The species not
Publicado em: 2009
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35. Dispersão de sementes por Atta robusta Borgmeier, 1939 (Hymenoptera: Formicidae) na restinga da Ilha de Guriri- ES / Seeds dispersal by Atta robusta Borgmeier, 1939 (Hymenoptera: Formicidae) in restinga forest Guriri Island, Brazil
This thesis characterized the use of fruits and seeds by Atta robusta Borgmeier, 1939, and the effects on the germination, seeds predation and seedlings survival. Fieldwork was carried out in the Guriri Island (1843S, 3945W), São Mateus, Espírito Santo State, Southeast Brazil, from March 2005 to March 2006. A. robusta was foraging 35 species of fruits and
Publicado em: 2007
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36. Interactions etween ants, fruits and seeds in the cerrado : the role of ants in the biology of seeds and seedlings / Interações entre formigas, frutos e sementes em solo de cerrado : o papel de formigas na biologia de sementes e plantulas
Our knowledge about seed dispersal systems has been improved considerably in the last few years. An increasing number of studies has shown that the process of plant regeneration is often much more complex than we realize, including several different agents across subsequent steps of seed dispersal. For instance, ants may reshape the seed shadow after seeds f
Publicado em: 2007