Interaction between habitat quality and an Allee-like effect in metapopulations

McVinish, Ross; Pollett, P. K.

doi:10.1016/j.ecolmodel.2012.07.001

Cited by 5 publications

(6 citation statements)

References 23 publications

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“…This second kind of tipping point has been identified in other metapopulation models, and is linked to an Allee effect, i.e. negative population growth below some density threshold [1,18]. In our model, the tipping point can be avoided in stable populations provided perturbations remain inside the basin of attraction for E + (region above the boundary surface in Figure 5).…”

Section: Positive Equilibriasupporting

confidence: 64%

“…Metapopulation models describe how a balance between occupied and unoccupied habitat patches is, or is not, maintained by colonization and extinction events. Most of these models assume that would-be colonists do not alter the state of the patch they leave upon departure (see [1,8,9,15,18,29]). When habitat patches are occupied by small numbers of individuals, however, dispersal by would-be colonists could leave a patch more susceptible to extinction associated with random events.…”

Section: Discussionmentioning

confidence: 99%

“…One assumption common to metapopulation models, like those proposed by Levins and Hanski, is that dispersal from a given source population, during the course of a colonization event, does not diminish the quality of the source itself (see [1,18,29]). In particular, dispersal of colonists from a source population does not render the source, itself, any more vulnerable to extinction.…”

Section: Introductionmentioning

confidence: 99%

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Dispersal altering local states has a limited effect on persistence of a metapopulation

Wild

2018

Journal of Biological Dynamics

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Metapopulations are collections of local populations connected by dispersal. Metapopulation models often assume would-be colonists affect the states of local populations they disperse from and those they disperse to. Here, we build a new framework to include that effect and to assess the impact of dispersal. Our model predicts that a metapopulation will, in general, be found either in the state of global extinction or in the state of persistence. Our key finding is that dispersal, and the state changes associated with dispersal, have significant qualitative and quantitative effects on long-term dynamics only in a narrow range of parameter space. We conclude that life history features other than dispersal (e.g. mortality rate) have a greater influence over metapopulation persistence. We discuss the implications of our results for conservation biology, the future application of our model to the study of cooperative breeding, as well as our model's limitations.

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Section: Positive Equilibriasupporting

confidence: 64%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dispersal altering local states has a limited effect on persistence of a metapopulation

Wild

2018

Journal of Biological Dynamics

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“…The organism-environment positive feedback, reflected by parameter λ > 0 in Eq 1, can generate Allee effect (i.e. AE-by-OEF, [8, 27, 34]).…”

Section: Modelsmentioning

confidence: 99%

Interaction between Allee effects caused by organism-environment feedback and by other ecological mechanisms

et al. 2017

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Understanding Allee effect has crucial importance for ecological conservation and management because it is strongly related to population extinction. Due to various ecological mechanisms accounting for Allee effect, it is necessary to study the influence of multiple Allee effects on the dynamics and persistence of population. We here focus on organism-environment feedback which can incur strong, weak, and fatal Allee effect (AE-by-OEF), and further examine their interaction with the Allee effects caused by other ecological mechanisms (AE-by-OM). The results show that multiple Allee effects largely increase the extinction risk of population either due to the enlargement of Allee threshold or the change of inherent characteristic of Allee effect, and such an increase will be enhanced dramatically with increasing the strength of individual Allee effects. Our simulations explicitly considering spatial structure also demonstrate that local interaction among habitat patches can greatly mitigate such superimposed Allee effects as well as individual Allee effect. This implies that spatially structurized habitat could play an important role in ecological conservation and management.

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“…As a product of these multidimensional flows, landscape may be considered to be a representative indicator for environmental analysis, given its connotation of perceptual synthesis, on a human scale, of the system of ecological relationships in the territory [2]. Various study focuses, principally from geographical and ecological sciences, have developed its analysis, leading to integrating concepts oriented towards understanding of this organization and its evolutionary process, characterising spatial patterns, and determining factors and impacts on natural systems [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Territorial Planning for Coastal Zones in Chile: The Need for Geographical-Environmental and Natural Risk Indicators for Spatial Decision Support Systems

Peña‒Cortés¹,

Rozas-Vásquez²,

Rebolledo³

et al. 2013

IJG

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Coastal zones are very dynamic and fragile environments, constituting a landscape ever more heterogeneous, fragmented and with increasing levels of complexity due to the changing relationship between man and nature. Integrated coastal zone management therefore requires detailed knowledge of the system and its components, based-to a large extent-on technical and scientific information. However, the information generated must be in line with the political requirements necessary for decision-making and planning. Thus the use of indicators to give a simplified view of the many components of the territory, and at the same time to provide important information about patterns or trends, becomes a tool of the utmost importance. These indicators can be understood as measurable characteristics of the environment, which facilitate comprehension of the processes occurring at different scales and serve as a reference to inform the population and support decision-making. The aim of the present note is to demonstrate briefly the need to develop geographical-environmental and natural risk indicators to facilitate comprehension of the dynamic of spatial and temporal landscape patterns, particularly in coastal environments. This approach offers an historical summary of the natural, socio-economic and political processes which currently make up the territory, and which without doubt will continue to influence it in the future. At the same time, it is proposed that information should be integrated on the basis of this framework with a view to generating spatial decision support systems in a context of planning and integrated management of the coastal zones of Chile.

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Interaction between habitat quality and an Allee-like effect in metapopulations

Cited by 5 publications

References 23 publications

Dispersal altering local states has a limited effect on persistence of a metapopulation

Dispersal altering local states has a limited effect on persistence of a metapopulation

Interaction between Allee effects caused by organism-environment feedback and by other ecological mechanisms

Territorial Planning for Coastal Zones in Chile: The Need for Geographical-Environmental and Natural Risk Indicators for Spatial Decision Support Systems

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