نتایج جستجو برای: metapopulation

تعداد نتایج: 1826  

Journal: :Evolution letters 2021

Abstract Despite the far-reaching evolutionary implications of sexual conflict, effects metapopulation structure, when populations are subdivided into several demes connected to some degree by migration, on conflict dynamics unknown. Here, we used experimental evolution in an insect model system, seed beetle Callosobruchus maculatus, assess independent and interacting selection histories associ...

Journal: :Bulletin of Mathematical Biology 2000

2002
Rampal S. Etienne

The Levins metapopulation model describes the dynamics of several populations in patches of suitable habitat. These populations may go extinct, leaving empty patches of suitable habitat, but these empty patches may be recolonized by other populations via dispersal. The metapopulation can therefore persist if recolonizations balance local extinctions. This simple model has been criticized for it...

Journal: :Journal of theoretical biology 2016
Eric Tromeur Lars Rudolf Thilo Gross

Dispersal is a key ecological process that enables local populations to form spatially extended systems called metapopulations. In the present study, we investigate how dispersal affects the linear stability of a general single-species metapopulation model. We discuss both the influence of local within-patch dynamics and the effects of various dispersal behaviours on stability. We find that pos...

2015
LI XU ZHONGXIANG CHANG

In this paper, local bifurcation of a discrete two patch logistic metapopulation is discussed. By the central manifold method, flip bifurcation can be analyzed at the positive fixed point from the viewpoint of the dynamical system, and the system can not undergo a fold bifurcation. Simulations on this model show the discrete model can have rich dynamical behaviors. The state feedback control is...

Journal: :Animal Conservation 2011

Journal: :The Journal of animal ecology 2013
Dieter Ebert Jürgen W Hottinger V Ilmari Pajunen

Migration and re-colonization enable organisms to persist in metapopulations. Re-colonization success may be limited by the number of arriving migrants or by patch quality. In a well-studied rock pool Daphnia metapopulation, it is frequently assumed that re-colonization is limited by the number of arriving migrants, and that all patches are equally suitable for colonization. This assumption str...

Journal: :Theoretical population biology 2016
R McVinish P K Pollett Y S Chan

We study a variant of Hanski's incidence function model that allows habitat patch characteristics to vary over time following a Markov process. The widely studied case where patches are classified as either suitable or unsuitable is included as a special case. For large metapopulations, we determine a recursion for the probability that a given habitat patch is occupied. This recursion enables u...

Journal: :J. Applied Probability 2014
Ross McVinish Philip K. Pollett

Hanski’s incidence function model is one of the most widely used metapopulation models in ecology. It models the presence/absence of a species at spatially distinct habitat patches as a discrete-time Markov chain whose transition probabilities are determined by the physical landscape. In this analysis, the limiting behaviour of the model is studied as the number of patches increases and the siz...

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