Skip to Main Content
Simulating dispersal of reintroduced species within heterogeneous landscapesAuthor(s): Robert H. Gardner; Eric J. Gustafson
Source: Ecological Modelling 171 (2004) 339?358
Publication Series: Scientific Journal (JRNL)
Station: North Central Research Station
PDF: View PDF (319.86 KB)
DescriptionThis paper describes the development and application of a spatially explicit, individual based model of animal dispersal (J-walk) to determine the relative effects of landscape heterogeneity, prey availability, predation risk, and the energy requirements and behavior of dispersing organisms on dispersal success. Significant unknowns exist for the simulation of complex movement behavior within heterogeneous landscapes. Therefore, initial simulations with J-walk examined the relative effect of landscape patterns and species-specific characteristics on dispersal success. Differences in landscape pattern were simulated by random generation of fractal maps with average available energy (i.e. prey) and predation risk expressed as a function of habitat type. Variation in species-specific patterns were then simulated by a series of scenarios that varied the response of dispersing individuals to habitat heterogeneity, including: habitat selection to maximize energy intake, habitat selection to minimize predation risk, or habitat selection contingent on energy reserves. Results showed that significant shifts in dispersal could be related to (1) the unique spatial arrangement of habitat within each map, (2) changes in relative prey abundance, and (3) variation in the relationship between energy availability and predation risk. Hypothetical management scenarios were used to identify critical data needed to assure the persistence of reintroduced populations of American martens (Martes americana).
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGardner, Robert H.; Gustafson, Eric J. 2004. Simulating dispersal of reintroduced species within heterogeneous landscapes. Ecological Modelling 171 (2004) 339?358
KeywordsDispersal model, landscape heterogeneity, prey availability, predation risk, movement behavior, prediction uncertainty, American marten
- Behavioral tradeoffs when dispersing across a patchy landscape.
- Influence of forest management alternatives and land type on susceptibility to fire in northern Wisconsin, USA
- Factors associated with grassland bird species richness: The relative roles of grassland area, landscape structure, and prey
XML: View XML