Journal ArticleDOI
Local movement in herbivorous insects: applying a passive diffusion model to mark-recapture field experiments.
TLDR
A simple passive diffusion model is used to analyze the local within-habitat dispersal of twelve species of herbivorous insects, finding variation both within and between species in diffusion coefficients is striking-certainly sufficient to generate significant consequences for population dynamics and interactions.Abstract:
A simple passive diffusion model is used to analyze the local within-habitat dispersal of twelve species of herbivorous insects. The data comprise field mark-recapture studies in relatively homogeneous habitats. For eight of the species, the cumulative frequency distributions of dispersal distances are consistent with a model of movement by passive diffusion. The observed departures from passive diffusion indicate the directions in which we need to modify our mathematical descriptions of movement if we are to develop realistic models of population dynamics and dispersal. The analyses also synthesize in a standard way the relative dispersal rates of several ecologically similar species. The variation both within and between species in diffusion coefficients is striking-certainly sufficient to generate significant consequences for population dynamics and interactions.read more
Citations
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Journal ArticleDOI
The Problem of Pattern and Scale in Ecology: The Robert H. MacArthur Award Lecture
TL;DR: The second volume in a series on terrestrial and marine comparisons focusing on the temporal complement of the earlier spatial analysis of patchiness and pattern was published by Levin et al..
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Models of dispersal in biological systems
TL;DR: Two stochastic processes that model the major modes of dispersal that are observed in nature are introduced, and explicit expressions for the mean squared displacement and other experimentally observable quantities are derived.
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Population ecology of insect invasions and their management
TL;DR: During the establishment phase of a biological invasion, population dynamics are strongly influenced by Allee effects and stochastic dynamics, both of which may lead to extinction of low-density populations.
Journal ArticleDOI
Spread of invading organisms
TL;DR: Kareiva et al. as mentioned in this paper, P.M. Andow, P.A. Levin, Simon A. Levin and Akira Okubo presented a method for the identification of species in the wild.
References
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Journal ArticleDOI
Random dispersal in theoretical populations.
TL;DR: In this paper, the authors used the random walk problem as a starting point for the analytical study of dispersal in living organisms and applied the law of diffusion to the understanding of the spatial distribution of population density in both linear and two-dimensional habitats.
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Dispersion and Population Interactions
TL;DR: The spatial component of environment, often neglected in modeling of ecological interactions, in general operates to increase species diversity due to the heterogeneity of the environment, but such heterogeneity can arise in an initially homogeneous environment due to what may be random initial events (e.g., colonization patterns).
Journal ArticleDOI
Random dispersal in theoretical populations
TL;DR: The random-walk problem is adopted as a starting point for the analytical study of dispersal in living organisms and the law of diffusion is deduced and applied to the understanding of the spatial distribution of population density in both linear and two-dimensional habitats.
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Spatial Segregation of Interacting Species
TL;DR: It is suggested that the heterogeneity of the environment and the non-linear dispersive movements raise a spatial segregation of the populations of two similar and competing species and there is a possibility that this spatial segregation acts to stabilize the coexistence of twoSimilar species, relaxing the interspecific competition.