Metapopulation Model
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Status conservacionista da mastofauna em fragmentos de Mata AtlÃntica Nordestina / Conservationist status of mammalls on atlantic forest fragments of brazilian northeastern
The aim of this study was to sample the medium and large sized mammalian fauna of the RPPN Frei Caneca and the surrounding area, comparing its abundance and diversity amongst four fragments of different sizes. The sample followed the Line Transect Method, when trails measuring between 1,3 and 2 km were established (depending on the size and shape of the frag
Publicado em: 2007
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2. Análise da fragmentação de áreas de vegetação natural e semi-natural do município de Santa Cruz da Conceição, São Paulo, Brasil.
Habitat fragmentation has three major components, namely loss of the original area and reduction in size and increasing of patches. This process was helped with the development of biogeography theory, metapopulation dynamic and sink and source model. This study analyzed the landscape dynamic of the municipality of Santa Cruz, São Palo State, Brazil to base
Publicado em: 2006
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3. Spatial parasite transmission, drug resistance, and the spread of rare genes
The transmission of many parasitic worms involves aggregated movement between hosts of “packets” of infectious larvae. We use a generic metapopulation model to show that this aggregation naturally promotes the preferential spread of rare recessive genes, compared with the expectations of traditional nonspatial models. A more biologically realistic mo
National Academy of Sciences.
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4. Multiscale, resurgent epidemics in a hierarchical metapopulation model
Although population structure has long been recognized as relevant to the spread of infectious disease, traditional mathematical models have understated the role of nonhomogenous mixing in populations with geographical and social structure. Recently, a wide variety of spatial and network models have been proposed that incorporate various aspects of interacti
National Academy of Sciences.
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5. Genetic drift and within-host metapopulation dynamics of HIV-1 infection
Most HIV replication occurs in solid lymphoid tissue, which has prominent architecture at the histological level, which separates groups of productively infected CD4+ cells. Nevertheless, current population models of HIV assume panmixis within lymphoid tissue. We present a simple “metapopulation” model of HIV replication, where the population of inf
The National Academy of Sciences.
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6. The Effective Size of a Subdivided Population
This paper derives the long-term effective size, N(e), for a general model of population subdivision, allowing for differential deme fitness, variable emigration and immigration rates, extinction, colonization, and correlations across generations in these processes. We show that various long-term measures of N(e) are equivalent. The effective size of a metap
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7. Metapopulation dynamics and spatial heterogeneity in cancer
With the advent of drugs targeting specific molecular defects in cancerous cells [Gorre, M. E., et al. (2001) Science 293, 876–880], it is important to understand the degree of genetic heterogeneity present in tumor cell populations and the rules that govern microdiversity in human cancer. Here, we first show that populations with different genotypes in ge
The National Academy of Sciences.
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8. Group selection on a quantitative character
We derive a model of group and individual selection on a quantitative character that is similar to the single-locus “metapopulation” models of group selection. Two alternative methods for the colonization of new or vacant habitats are examined and their effects are contrasted. In one model, all populations contribute migrants to a common pool, the “mig