Ecological Specialization
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Microbial interactions: ecology in a molecular perspective
ABSTRACT The microorganism-microorganism or microorganism-host interactions are the key strategy to colonize and establish in a variety of different environments. These interactions involve all ecological aspects, including physiochemical changes, metabolite exchange, metabolite conversion, signaling, chemotaxis and genetic exchange resulting in genotype sel
Braz. J. Microbiol.. Publicado em: 2016-12
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2. Organização trófica da comunidade de peixes de poças de maré da Praia dos Castelhanos (ES), Atlântico sudoeste tropical / Trophic organization of the tidepool fish community of Praia dos Castelhanos (ES), southwestern tropical Atlantic
The identification of the trophic groups is fundamental to understanding the factors responsible for organizing and structuring the communities. Accordingly, the present study was conducted in the tidepools of Praia dos Castelhanos, located in the Espírito Santo State, southeastern Brazil, in order to describe the trophic organization of the fish community,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2012
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3. Ecologia alimentar da toninha Pontoporia blainvillei (Cetacea) / Feeding ecology of franciscana dolphin Pontoporia blainvillei (Cetacea)
Ecological niche theory is originally based on the assumption that individuals of a species use similar resources and therefore are ecologically equivalents. Under this framework, the niche of the species can be defined in terms of average resource use. However, factors such as quality and quantity of prey resources in the environment, consumer gender, age o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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4. Determinantes ecológicos do risco de extinção: abundância local, amplitude de nicho, capacidade de dispersão e a resposta das espécies de pequenos mamíferos à fragmentação florestal no Planalto Atlântico Paulista / Ecological determinants of extinction risk: local abundance, niche breadth, dispersal ability and response of small mammals to forest fragmentation at the Atlantic Plateau of São Paulo
Anthropogenic disturbances, particularly habitat loss and fragmentation, are considered the main causes of the increased extinction rates observed in the last decades. Since the risk of extinction is extremely variable among species, the ecological determinants of the chance of extinction have been in the center of the debates in the ecological literature. E
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/11/2011
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5. Ecologia trófica e ecomorfologia da ictiofauna de igarapés maranhenses
The trophic ecology is one of the most important aspects to understand the role of a species in the community and in the ecosystem functioning. Studies regarding the feeding of fishes coupled to the ecomorphology of a species become important tools in understanding their ecological role and position in the environment. The present study aimed to analyze the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/06/2011
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6. Ecologia trÃfica de Rhinella hoogmoedi Caramaschi e Pombal, 2006 (Anura, Bufonidae) em uma floresta Ãmida do estado do CearÃ, Brasil / Trophic ecology of Rhinella hoogmoedi Caramaschi e Pombal, 2006 (Anura, Bufonidae) in a humid forest in the State of CearÃ, Brazil.
The understanding of trophic relations among species is essential for the comprehension of their ecological evolutionary history, as well as in the understanding of how communities are structured. The consumption of the same food resource by two or more species may result in the evolution of mechanisms capable of reducing this inter- specific competition, wi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/05/2011
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7. Estudo de interações de parasitoides de insetos endófagos em frutos do cerrado
Interactions between endofagous insects in fruits play an important role in ecological communities, since the seed survivorship and hence the successes in recruitment of plant populations are directed related to damage caused by the herbivory from these insects. Because of the specialization of the herbivorous insects, the insect-plant interactions tend to b
Publicado em: 2010
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8. História natural e interação flores-besouros em espécies de Cerrado / Natural history and flower-beetle interactions in Cerrado species
Plant-animal interactions, such as pollination, are a key element in many terrestrial communities. The study of who interacts with whom is an important approach for understanding ecological and evolutionary processes. In some tropical communities, up to one quarter of all plant species may be pollinated by beetles. They are an ancient and much diversified in
Publicado em: 2009
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9. Trophic niche of Tropidurus hispidus (Sauria: Tropiduridae) in restinga environment / Nicho trofico de Tropidurus hispidus (Sauria: Tropiduridae) em ambiente de restinga
The diet is one of the main atributes of the ecological niche of animal species. Generally, the individuals of a population are considered ecologically equivalent in ecological studies that focus on resource use. Nevertheless, this approach has been inadequate to correctly describe resource use by various species, as demonstrated by empirical data. Intrapopu
Publicado em: 2008
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10. Currículo em educação especial : o texto, as imagens e o acesso ao ensino
This work is an investigation on teaching concepts through analysis of documents that register the curricular culture from where we see the possibility of teaching the individual within their different conditions maintaining the practice of teaching specialization. This research was carried out by using official and non official publications with information
Publicado em: 2006
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11. The evolution of a pleiotropic fitness tradeoff in Pseudomonas fluorescens
The evolution of ecological specialization is expected to carry a cost, due to either antagonistic pleiotropy or mutation accumulation. In general, it has been difficult to distinguish between these two possibilities. Here, we demonstrate that the experimental evolution of niche-specialist genotypes of the bacterium Pseudomonas fluorescens that colonize the
National Academy of Sciences.
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12. Ecological specialization and population size in a biodiversity hotspot: How rare species avoid extinction
Species with narrow environmental niches typically have small geographic ranges. Small range size is, in turn, often associated with low local abundance. Together, these factors should mean that ecological specialists have very small total populations, putting them at high risk of extinction. But some specialized and geographically restricted species are anc
National Academy of Sciences.