Landskapsekologisk analys i Stockholms stad - Insyn Sverige

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De lokala populationerna är så små att de av L Adamsson — Keywords: Geography, Physical Geography, Landscape Ecology, Landscape Index, GIS, broad-leaved Spatially realistic theory of metapopulation ecology. Metapopulation biology is concerned with the dynamic consequences of migration among local populations and the conditions of regional persistence of species with unstable local populations. Classical metapopulation dynamics In this section we seek to \scale up" from the two-patch model de-veloped in the preceding section to consider the dynamics of a pop-ulation on an arbitrary number of patches. Unfortunately, it is not feasible to simply add more equations to the existing system of two equations. Some simple calculations show why.

Metapopulation dynamics

The model is constructed as a generalized incidence function, which describes how the fraction of occupied habitat patches depends on patch areas and isolations. The model may be fitted to presence/absence data from a metapopulation at a dynamic equilibrium between extinctions and colonizations. Metapopulation Dynamics -Levins Model.. Theory . Procedure . Self Evaluation .

doi: 10.1016/s0040-5809(03)00106-0. Authors Dynamics of Metapopulation- Conditions for definition.- Types of metapopulation- Habi Ecology: Graduate Level; Meta-Population: - Concept of Metapopulation.- Ter Braak CJF, Hanski I, Verboom J (1998) The incidence function approach to modeling of metapopulation dynamics.

Metapopulation dynamics and reserve network design

Metapopulation theory provides a framework for understanding population persistence in fragmented landscapes and as such has been widely used in conservation biology to inform management of fragmented populations. However, classical metapopulation theory [Levins, R. (1970) Lect. Notes Math.

Generalizing Levins metapopulation model in explicit space

San Project title (eng):, Metapopulation dynamics and functional diversity of saproxylic fungi in fragmented landscapes with contrasting land-use histories. Adm. org. av D GUSTAFSON · 2002 · Citerat av 12 — En metapopulation består av ett större antal befintliga och potentiella habitat med ett antal livskraftiga Metapopulation dynamics and amphibian conservation. av SÅKE BERGLIND · 2005 · Citerat av 13 — Keywords: demography, extinction, habitat, Lacerta agilis, management, metapopulation, peripheral populations, population dynamics, av K Fedrowitz · 2011 · Citerat av 5 — Species habitat-tracking metapopulation dynamics could partly be explained by habitat quality and size, spatial connectivity, and possibly Molecular Ecology 21, 267 - 280. Metapopulation dynamics.

Levins Model: The concept of metapopulation was introduced by Richard Levins (an American ecologist) in 1969. Classical metapopulation dynamics In this section we seek to \scale up" from the two-patch model de-veloped in the preceding section to consider the dynamics of a pop-ulation on an arbitrary number of patches. Unfortunately, it is not feasible to simply add more equations to the existing system of two equations. Some simple calculations show why. Metapopulation Dynamics Metapopulation theory and concepts are the central paradigm for understanding the spatial and temporal dynamics of species interactions. Our research explores these sorts of ecological dynamics using mathematical tools, species record databases and experimental approaches. Metapopulation studies have important conceptual links with the equilibrium theory of island biogeography and with studies on the dynamics of species living in patchy environments.
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Metapopulation Dynamics -Levins Model.. Theory .

Specifically, you will explore the dynamics of a source-sink metapopulation and how these dynamics influence management decisions. Measles Metapopulation Dynamics: A Gravity Model for Epidemiological Coupling and Dynamics Yingcun Xia,1,* Ottar N. Bjørnstad,2,† and Bryan T. Grenfell3,‡ 1. Department of Statistics and Applied Probability, National University of Singapore, Singapore; 2. Departments of Entomology and Biology, Pennsylvania State A toxicant‐dosed metapopulation model was used to explore the range of possible dynamics of populations in contaminated field sites.
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META-XR-Software for Metapopulation Viability Analysis

To explore metapopulation dynamics in the absence of dispersal, click on the "No dispersal" box underneath the four circles, and choose "Less" for "Distance" (the distance between subpopulations of the metapopulation). In addition, within a metapopulation, the creation or restoration of additional, discrete sites may buffer the whole population against the effects of localised events or demographic stochasticity (Hanski & Gyllenberg, 1993).

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Ecology 93: 235-241. Ranius, T., Johansson, V. & Fahrig, Sammanfattning: A recent study [Harding and McNamara, 2002. A unifying framework for metapopulation dynamics. Am. Nat. 160, 173-185] presented a unifying The crested newt has generally been considered as performing metapopulation dynamics. (Miaud et al. 1993, Griffiths & Williams 2000, Malmgren 2002b), and The role of between-patch dynamics in a metapopulation: a discrete-time modelling approach. NG Marculis, J Arroyo-Esquivel, A Hastings.

The relative importance of local and regional processes to

Ranius, T., Johansson, V. & Fahrig, Sammanfattning: A recent study [Harding and McNamara, 2002. A unifying framework for metapopulation dynamics. Am. Nat. 160, 173-185] presented a unifying The crested newt has generally been considered as performing metapopulation dynamics. (Miaud et al. 1993, Griffiths & Williams 2000, Malmgren 2002b), and The role of between-patch dynamics in a metapopulation: a discrete-time modelling approach.

Unfortunately, it is not feasible to simply add more equations to the existing system of two equations. Some simple calculations show why. Such a collection of populations and its dynamics is called metapopulation dynamics. Each local habitat in a metapopulation is referred as subpopulations. A metapopulation consists of a group of spatially separated populations of the same species which interact at some level. The term metapopulation was coined by Richard Levins in 1969 to describe a model of population dynamics of insect pests in agricultural fields, but the idea has been most broadly applied to species in naturally or artificially fragmented habitats. Metapopulation biology is concerned with the dynamic consequences of migration among local populations and the conditions of regional persistence of species with unstable local populations.