Space Temporal Heterogeneity
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Dinâmica funcional da comunidade microbiana heterotrófica em lagoa rasa subtropical
Aquatic ecosystems float around trends in which abrupt transitions can occur between persistents regimes, alterning the viability of the resources or the physical and chemical parameters. Following this trend, communities vary in time and space as a result of their interactions with the environment and other organisms. Microbial communities are important com
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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2. 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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3. Dinâmica de uso das terras nos municípios de Bonito, Jardim e Bodoquena (MS) e o estado e conservação dos recursos biológicos do Parque Nacional da Serra da Bodoquena e de sua zona de amortecimento / Spatial and temporal dynamics of land use in Bonito, Jardim and Bodoquena (MS) Municipalities, and the conservation state of the biological resources in the Serra da Bodoquena National Park buffer zone
The research approached the process of use and occupation of lands in the cities of Bonito, Bodoquena and Jardim, situated in the edge east of the National Park of the Serra da Bodoquena (NPSB), southwestern region of Mato Grosso do Sul, Brazil. Moreover, the conservation state was studied, in terms of structure and configuration of the landscape, of the con
Publicado em: 2008
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4. Padrões espaciais da raiva bovina e seus determinantes no estado de são paulo entre 1992 e 2003
- Cattle rabies is a zoonosis that has been studied since the beginning of last century due to its importance in the public health, ecology and economy fields. The understanding of its epidemiology through an ecology approach is the starting point of this Thesis. This study understands that either territory or cattle raise of Sao Paulo State, Brazil, influen
Publicado em: 2008
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5. Contribution to limnological knowledge of brazilian semi-arid reservoir that supply Fortalezas metropolitan region: Pacajus and Gavião dams (Ceará, Brazil) / Contribuição ao conhecimento limnológico de reservatórios do semi-árido brasileiro que abastecem a região metropolitana de Fortaleza: Açudes Pacajus e Gavião (Ceará, Brasil)
The main aim of this research was to investigate the influence of climatic and hydrodynamicsalterations about physical stability, resources availability, zooplankton community structure and spatial heterogeneity standard of Pacajus and Gavião dams, collected at two-month period between Nov. 1988 and Dec. 1998. In the reservoirs, the sample stations were dis
Publicado em: 2007
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6. Padrões de distribuição genotipica em litorinideos (Mollusca : Gastropoda) da costa brasileira / Genotypic distribution patterns in littorinids (Mollusca : Gastropoda) from Brazilian coast
One of the main questions in biology is the link between a species ecology and its evolution. Evaluating the relationship between the geographical scale over which populations differ genetically and the species dispersal ability is a way to understand how this link is established. Spatial variation in allellic frequencies of natural populations may be explai
Publicado em: 2005
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7. VariaÃÃo espacial e temporal da comunidade microfitoplÃnctÃnica em ecossistemas costeiros localizados no litoral sul de Pernambuco, Nordeste do Brasil
The coastal marine environment shows a strong ocean- continent-atmosphere interaction and for that reason is considered extremely complex from the biological point of view due to the influence of many systems, so it can be characterized as one of the most fertile and dynamic of the hydrosphere. The estuarine complex (Ilhetas and Mamucaba rivers) and the Tama
Publicado em: 2005
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8. Disturbance, Patch Formation, and Community Structure
A model is developed to relate community structure to level of environmental disturbance in systems in which the effects of disturbance are localized in space and time. In general these disturbances create a pattern of spatio-temporal heterogeneity by renewing a limiting resource, thereby permitting utilization by species that are not dominant competitors. T
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9. Horizontal Heterogeneity of Denitrifying Bacterial Communities in Marine Sediments by Terminal Restriction Fragment Length Polymorphism Analysis
Although it is widely believed that horizontal patchiness exists in microbial sediment communities, determining the extent of variability or the particular members of the bacterial community which account for the observed differences among sites at various scales has not been routinely demonstrated. In this study, horizontal heterogeneity was examined in tim
American Society for Microbiology.
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10. Temporal and Microgeographic Variation in Allozyme Frequencies in a Natural Population of DROSOPHILA BUZZATII
Temporal variation in allozyme frequencies at six loci was studied by making monthly collections over 4 yr in one population of the cactophilic species Drosophila buzzatii. Ten sites were defined within the study locality, and for all temporal samples, separate collections were made at each of these sites. Population structure over microgeographic space and
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11. The Risk of a Mosquito-Borne Infectionin a Heterogeneous Environment
A common assumption about malaria, dengue, and other mosquito-borne infections is that the two main components of the risk of human infection—the rate at which people are bitten (human biting rate) and the proportion of mosquitoes that are infectious—are positively correlated. In fact, these two risk factors are generated by different processes and may b
Public Library of Science.
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12. Bringing the Hutchinsonian niche into the 21st century: Ecological and evolutionary perspectives
G. Evelyn Hutchinson more than a half century ago proposed that one could characterize the ecological niche of a species as an abstract mapping of population dynamics onto an environmental space, the axes of which are abiotic and biotic factors that influence birth and death rates. If a habitat has conditions within a species' niche, a population should pers
National Academy of Sciences.