Journal ArticleDOI
Sources, Sinks, and Population Regulation
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If the surplus population of the source is large and the per capita deficit in the sink is small, only a small fraction of the total population will occur in areas where local reproduction is sufficient to compensate for local mortality, and the realized niche may be larger than the fundamental niche.Abstract:
Animal and plant populations often occupy a variety of local areas and may experience different local birth and death rates in different areas. When this occurs, reproductive surpluses from productive source habitats may maintain populations in sink habitats, where local reproductive success fails to keep pace with local mortality. For animals with active habitat selection, an equilibrium with both source and sink habitats occupied can be both ecologically and evolutionarily stable. If the surplus population of the source is large and the per capita deficit in the sink is small, only a small fraction of the total population will occur in areas where local reproduction is sufficient to compensate for local mortality. In this sense, the realized niche may be larger than the fundamental niche. Consequently, the particular species assemblage occupying any local study site may consist of a mixture of source and sink populations and may be as much or more influenced by the type and proximity of other habitats a...read more
Citations
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The metacommunity concept: a framework for multi-scale community ecology
Mathew A. Leibold,Marcel Holyoak,Nicolas Mouquet,Nicolas Mouquet,Priyanga Amarasekare,Jonathan M. Chase,Martha F. Hoopes,Robert D. Holt,Jonathan B. Shurin,Richard Law,David Tilman,Michel Loreau,Andrew Gonzalez +12 more
TL;DR: This framework is used to discuss why the metacommunity concept is useful in modifying existing ecological thinking and illustrate this with a number of both theoretical and empirical examples.
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AUC: a misleading measure of the performance of predictive distribution models
TL;DR: The area under the receiver operating characteristic (ROC) curve, known as the AUC, is currently considered to be the standard method to assess the accuracy of predictive distribution models as discussed by the authors.
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Ecological Processes That Affect Populations in Complex Landscapes
TL;DR: A general framework for understanding the ecological processes that operate at landscape scales is described and the composition of habitat types in a landscape and the physiognomic or spatial arrangement of those habitats are the two essential features that are required to describe any landscape.
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Spatial prediction of species distribution: an interface between ecological theory and statistical modelling
TL;DR: In this article, an ecological model concerning the ecological theory to be used or tested, a data model concerning collection and measurement of the data, and a statistical model concerning statistical theory and methods used.
Journal ArticleDOI
Metapopulation dynamics: brief history and conceptual domain
Ilkka Hanski,Michael E. Gilpin +1 more
TL;DR: 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 as mentioned in this paper, and they play an increasingly important role in landscape ecology and conservation biology.
References
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Journal ArticleDOI
Density as a misleading indicator of habitat quality
TL;DR: The objectives of this paper are to make predictions regarding species and envi- ronmental types for which the density- habitat quality relationship is likely to be decoupled, and to make examples of situations in which this correlation does not hold.
Journal ArticleDOI
Population dynamics in two-patch environments: some anomalous consequences of an optimal habitat distribution
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Journal ArticleDOI
Population Dynamic Models in Heterogeneous Environments
TL;DR: Population Dynamics and Heterogeneous Environments as discussed by the authors is a review of the literature on population dynamics in heterogeneous environments, with a focus on models of the dynamics of the genetics of populations in these environments.
Book
Mathematical Ideas in Biology
TL;DR: In this article, the authors discuss the consequences of scale on the genetics of a population and its consequences in the context of regulation and control, and the role of families in these consequences.