Seed Predation
Mostrando 1-12 de 42 artigos, teses e dissertações.
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1. RELATIONSHIP BETWEEN INTERNAL MORPHOLOGY AND PHYSIOLOGICAL QUALITY OF Leucaena leucocephala SEEDS USING IMAGE ANALYSIS
RESUMO O uso de novas abordagens metodológicas e a inclusão de avaliações não destrutíveis na determinação de qualidade das sementes florestais tem se mostrado de grande importância para o desenvolvimento da produção florestal. O objetivo deste trabalho foi avaliar a eficácia do uso de ferramenta semi-automatizada de medição de imagens digitais
Rev. Árvore. Publicado em: 14/11/2019
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2. Crop size influences pre-dispersal seed predation in the Brazilian Cerrado
ABSTRACT Many pre-dispersal seed predators are specialized insects that rely on seeds for larval development. These insects may respond to the amount of seeds produced by a plant (i.e. crop size), increasing the proportion of seeds damaged with increases in seed numbers. Large seeds have more resources and spend more time in plants to complete their developm
Acta Bot. Bras.. Publicado em: 27/11/2017
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3. Disentangling plant establishment in sandy coastal systems: biotic and abiotic factors that determine Allagoptera arenaria (Arecaceae) germination
ABSTRACT Germination rate and establishment success of plants in harsh environments depend on the ability of seeds to withstand unfavorable environmental conditions and avoid predators. Brazilian coastal plains, known as restinga, are subject to environmental factors that seriously limit plant establishment and survival (e.g. salinity, desiccation, oligotrop
Acta Bot. Bras.. Publicado em: 19/10/2017
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4. Do fruit morphology and scarification affect germination and predation rates of Babassu seeds?
ABSTRACT Seed predation is a natural phenomenon that can occur either before or after dispersal and can significantly reduce the economic value and reproductive potential of plants. The babassu palm (Attalea vitrivir, Arecaceae) is important to rural communities that extract oil from its fruits for a wide variety of uses. We evaluated the predation and germi
Acta Bot. Bras.. Publicado em: 2016-12
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5. 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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6. Demographic structure of a threatened palm (Euterpe edulis Mart.) in a fragmented landscape of Atlantic Forest in northeastern Brazil
At the northern limits of the range of the palm species Euterpe edulis there is an endemic ecotype, known as the "Bahia" ecotype, which is distinguished by its reddish crownshaft and low seed production. Unfortunately, little is known about its demographic characteristics. Therefore, we contrasted the density of E. edulis populations in the Una region, in th
Acta Bot. Bras.. Publicado em: 2014-06
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7. Habitat use and movements of Glossophaga soricina and Lonchophylla dekeyseri (Chiroptera: Phyllostomidae) in a Neotropical savannah
The greatest current threat to terrestrial fauna is continuous and severe landscape modification that destroys and degrades animal habitats. This rapid and severe modification has threatened species, local biological communities, and the ecological services that they provide, such as seed dispersal, insect predation, and pollination. Bats are important polli
Zoologia (Curitiba). Publicado em: 2014-06
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8. Intra annual seed production and availability of two morphotypes of Brosimum rubescens taubert in forests of the Colombian Amazon
We assessed the reproductive phenology, production, and availability of seeds for two morphotypes of Brosimum rubescens Taub. (Moraceae), locally known as black palosangre (BP) and white palosangre (WP) during an annual cycle in a 20-ha mega plot located in a primary forest at the El Zafire Biological Station, in the Colombian Amazon. We found that 87% and 4
Biota Neotrop.. Publicado em: 2014
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9. Mamíferos e a regeneração da palmeira Attalea dubia em uma área de Mata Atlântica na região Sudoeste do Estado de São Paulo, Brasil
A sobrevivência, distribuição espacial e densidade das plantas podem ser mediadas pelas interações entre animais e plantas. Alguns modelos (como de Janzen-Connell) assumem que a probabilidade de sobrevivência de sementes e plântulas é menor ao redor da planta-mãe devido à intensa predação de sementes e herbivoria, sugerindo que a dispersão de se
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/05/2012
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10. Identification of Albizia lebbeck seed coat chitin-binding vicilins (7S globulins) with high toxicity to the larvae of the bruchid Callosobruchus maculatus
Seed coat is a specialized maternal tissue that interfaces the embryo and the external environment during embryogenesis, dormancy and germination. In addition, it is the first defensive barrier against penetration by pathogens and herbivores. Here we show that Albizia lebbeck seed coat dramatically compromises the oviposition, eclosion and development of the
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-02
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11. Ecologia reprodutiva de espécies de Callisthene e Qualea (Vochysiaceae): aborto, poliembrionia e predação de sementes / Reproductive ecology of species of Callisthene and Qualea (Vochysiaceae): seed abortion, polyembryony and predation
A capacidade das plantas de se reproduzirem e gerarem descendentes férteis aptos ao estabelecimento no meio ambiente sofre influência de diferentes fatores, sejam eles intrínsecos a sua morfo-fisiologia ou agentes externos, físicos e biológicos. Assim, o sucesso reprodutivo de uma espécie está diretamente relacionado com a progênie formada e os fator
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2011
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12. Papel de vertebrados dispersores/predadores de sementes e parasitóides na taxa de predação de sementes por besouros em fragmentos florestais do sudeste brasileiro / The role of vertebrate seed disperses /predators and parasitoids wasps on the rate of seed predation by beetles in forest fragments in southeastern Brazil
Plantas com sementes grandes, como palmeiras, são mais afetadas em áreas defaunadas. A redução de dispersores de sementes resulta em maior acumulo de sementes sob a planta-mãe, onde a predação e mais intensa. Roedores e besouros são os principais predadores de sementes de palmeiras e podem interagir entre si, competindo por sementes, ou com roedores
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/02/2011