Seedling Recruitment
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. Remoção de sementes por formigas, aves e roedores em área de Cerrado e seu efeito sobre o recrutamento de plântulas / Seed removal by ants, birds and rodents in a cerrado area and its effects on seedling recruitment
Many plant populations are affected by seed consumers since these can affect the rates and patterns of seedling recruitment. Ants, birds and rodents are main agents of seed removal. Therefore, the aim of this study was to determine the relative importance of ants, birds and rodents on seed removal in different types of Cerrado vegetations and to determine th
Publicado em: 2008
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14. A distribuiÃÃo das formigas cortadeiras (Atta chephalotes) e seu papel na regeneraÃÃo de um trecho de Floresta AtlÃntica Nordestina
The leaf-cutting ants are considered important herbivores in Neotropical primary forests because they promote spatial and temporal heterogeneity of resources such as light, nutrients and soil. Despite their known importance, their distribution in early secondary forests and their role on forest regeneration are still poorly studied. This work was developed i
Publicado em: 2008
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15. 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
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16. Ecologia populacional da palmeira Geonoma Schottiana Mart. em mata de Galeria no Brasil central
The objective of this study was to describe aspects of the population ecology of Geonoma schottiana, an understory clonal palm, in gallery forest of Central Brazil. Specifically, three questions were raised: (i) how do climatic variations during the year and the stages in the life cycle affect growth and reproduction? (ii) how does regeneration occur and whi
Publicado em: 2006
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17. Interações entre Pachycondyla striata e Odontomachus chelifer (Formicidae, Ponerinae) e diasporos em tres fisionomias florestais da Mata Atlantica / Interactions between Pachycondyla striata and Odontomachus chelifer (Formicidae, Ponerinae), and diaspores in three landscapes at Mata Atlantica
The present study investigated the spatial variation in interactions involving the ponerine ants Pachycondyla striata and Odontomachus chelifer and nonmyrmecochorous diaspores. The study was carried out at the three continuous forests formations in the Brazilian Atlantic forest: Restinga forest (2-3 m above sea level), Lowland forest (05-30 m above sea level
Publicado em: 2006
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18. Efeito de borda e reduÃÃo de diversidade vegetal: o papel da Attalea oleifera Barb. Rodr. (Arecaceae)
Due to dispersion lack, germination failure and increased mortality rates, the seedling bank in forest edges is impoverished and scarce. To understand how habitat fragmentation and edge creation affects recruitment is crucial to identify threats to tree population maintenance in a fragmented landscape. The present work aims to evaluate if Attalea oleifera, a
Publicado em: 2005
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19. DispersÃo e predaÃÃo de grandes sementes por Sciurus aestuans L. em fragmentos de floresta AtlÃntica montana no Estado do EspÃrito Santo, Brasil
The plantâdispersor interactions influence the adaptive values of plants and animals, acting directly on the reproductive characters of plant species and life histories of animal species. The fruvigory pattern influences the seed shadow patterns of plants, the predation rates by invertebrates and consequently the germination, seedling survival and adult rec
Publicado em: 2004
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20. O destino pos-dispersão das sementes do caquizinho-do-mato (Diospyros inconstans) ingeridas pelo bugio-ruivo (Alouatta guariba clamitans) em uma floresta subtropical no sul do Brasil
The main benefit frugivorous vertebrates provide to plants is the distribution of their seeds in sites favorable for survival. The dispersal efficiency may be determined by the quality of the dispersal site, which directly influences post-dispersal seed and seedling survival. However, very few studies have investigated the relations between disperser activit
Publicado em: 2003
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21. Dinamica da dispersão de sementes e regeneração de plantas da planicie litoranea da Ilha do Mel, PR
(Seed dispersal and plant regeneration dynamics in a Sandy Coastal Plain on Ilha do Mel, southern Brazil): The island Ilha do Mel is located in the municipality of Paranaguá (25°29 /25°34 32"S e 48°17 15"/48°23 16"W) in the central coastal region of Paraná State, Brazil and comprises 2760ha. The higher areas above the Sandy Coastal Plain contains very
Publicado em: 2002
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22. Estrategias adptativas de especies arboreas tipicas de ambiente do solo hidricamente saturado : uma abordagem morfologica, bioquimica e ecofisiologica
The hydric saturation of soil leads to a rapid 02 depletion, that limits processes as germination, establishment and plant growth. The goals of the present thesis were to characterize demographic aspects, to identify the adaptative responses of seeds and plants of five tree species that enable their development on the swampy forest, and to correlate these re
Publicado em: 1998
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23. Tolerancia a inundação e aspectos demograficos de Inga affinis Dc
Although protected by legislation since 1934 the forests along river margins, i.e. Gallery Forests, are still being cut and/or burnt in the interior of the State of São Paulo. The destriction of these forests result in irreversible environmentaI damages, such as soil erosion and silting UP the rivers and water reservoirs. The preservation and management of
Publicado em: 1990
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24. Directed seed dispersal by bellbirds in a tropical cloud forest
A fundamental goal of plant population ecology is to understand the consequences for plant fitness of seed dispersal by animals. Theories of seed dispersal and tropical forest regeneration suggest that the advantages of seed dispersal for most plants are escape from seed predation near the parent tree and colonization of vacant sites, the locations of which
The National Academy of Sciences.