Influence of DEM Uncertainty on the Individual-Based Modeling of Dispersal Behavior: A Simple Experiment

摘要: It is generally accepted that the perceptual range of an animal towards different landscape elements can influence its movement through heterogeneous landscapes. Dispersal a determining factor in spread species as well metapopulation dynamics. An individual-based, spatially explicit model with isotropic was used to simulate dispersal grey squirrels (Sciurus carolinensis). The effects anisotropic are modeled by incorporating digital elevation (DEM) data representation so line-of-sight analysis be arrive at range. This simple experiment uses Monte Carlo simulation study effect DEM uncertainty may have on simulated movements individuals. Mean displacement distance and straightness index measure walks taken habitat patch terminus for each individual determine if individuals would end same simulation. Two ranges differing extent were used. For both measures behavior they vary more when larger Results showed nature could affect individual’s behavior. often resulted greater deviation from baseline results. suggests individual-based models.