نتایج جستجو برای: metapopulation

تعداد نتایج: 1826  

2006
Séverine Vuilleumier Nicolas Perrin

Connectivity among demes in a metapopulation depends on both the landscape’s and the focal organism’s properties (including its mobility and cognitive abilities). Using individual-based simulations, we contrast the consequences of three different cognitive strategies on several measures of metapopulation connectivity. Model animals search suitable habitat patches while dispersing through a mode...

Journal: :Journal of Differential Equations 2022

In this article, we introduce an infinite-dimensional deterministic metapopulation SIS model which takes into account the heterogeneity of infections and social network among a large population. We study long-time behavior dynamic. identify basic reproduction number R0 determines whether there exists stable endemic steady state (super-critical case: R0>1) or if only equilibrium is disease-free ...

2009
Manuela Winkler Karl Hülber Peter Hietz

BACKGROUND AND AIMS Populations of many epiphytes show a patchy distribution where clusters of plants growing on individual trees are spatially separated and may thus function as metapopulations. Seed dispersal is necessary to (re)colonize unoccupied habitats, and to transfer seeds from high- to low-competition patches. Increasing dispersal distances, however, reduces local fecundity and the pr...

Journal: :Theoretical population biology 2013
A Eriksson F Elías-Wolff B Mehlig

We analyse metapopulation dynamics in terms of an individual-based, stochastic model of a finite metapopulation. We suggest a new approach, using the number of patches in the population as a large parameter. This approach does not require that the number of individuals per patch is large, neither is it necessary to assume a time-scale separation between local population dynamics and migration. ...

Journal: :The American naturalist 2004
Eloy Revilla Thorsten Wiegand Francisco Palomares Pablo Ferreras Miguel Delibes

Mounting theoretical and empirical evidence shows that matrix heterogeneity may have contrasting effects on metapopulation dynamics by contributing to patch isolation in nontrivial ways. We analyze the movement properties during interpatch dispersal in a metapopulation of Iberian lynx (Lynx pardinus). On a daily temporal scale, lynx habitat selection defines two types of matrix habitats where i...

2014
TOBY FOUNTAIN LUDOVIC DUVAUX GAVIN HORSBURGH KLAUS REINHARDT ROGER K BUTLIN

The number and demographic history of colonists can have dramatic consequences for the way in which genetic diversity is distributed and maintained in a metapopulation. The bed bug (Cimex lectularius) is a re-emerging pest species whose close association with humans has led to frequent local extinction and colonization, that is, to metapopulation dynamics. Pest control limits the lifespan of su...

Journal: :Evolution; international journal of organic evolution 2001
M B Cruzan

Abstract.-The level and distribution of genetic variation is thought to be affected primarily by the size of individual populations and by gene flow among populations. Although the effects of population size have frequently been examined, the contributions of regional gene flow to levels of genetic variation are less well known. Here I examine the effects of population size and the number of ne...

Journal: :Ecology 2009
Jenny A Hodgson Atte Moilanen Chris D Thomas

Many species have to track changes in the spatial distribution of suitable habitat from generation to generation. Understanding the dynamics of such species will likely require spatially explicit models, and patch-based metapopulation models are potentially appropriate. However, relatively little attention has been paid to developing metapopulation models that include habitat dynamics, and very...

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