Testing time-geographic density estimation for home range analysis using an agent-based model of animal movement
Time-geographic density estimation (TGDE) is a method of movement pattern analysis that generates a continuous intensity surface from a set of tracking data. TGDE has recently been proposed as a method of animal home range estimation, where the goal is to delineate the spatial extents
that an animal occupies. This paper tests TGDE’s effectiveness as a home range estimator using simulated movement data. First, an agent-based model is used to simulate tracking data under 16 movement scenarios representing a variety of animal life history traits (habitat preferences,
homing behaviour, mobility) and habitat configurations (levels of habitat fragmentation). Second, the accuracy of TGDE is evaluated for four temporal sampling frequencies using three adaptive velocity parameters for 30 sample data sets from each scenario. Third, TGDE accuracy is compared to
two other common home range estimation methods, kernel density estimation (KDE) and characteristic hull polygons (CHP). The results demonstrate that TGDE is the most effective at estimating core areas, home ranges and total areas at high sampling frequencies, while CHP performs better at low
sampling frequencies. KDE was ineffective across all scenarios explored.
Keywords: Time geography; computational movement analysis; home range; movement pattern analysis; simulation
Document Type: Research Article
Affiliations: 1: School of Geosciences, University of South Florida, Tampa, USA 2: Department of Geography, The Florida State University, Tallahassee, USA 3: Geography and Environmental Sustainability, University of Oklahoma, Norman, USA 4: Department of Geography, Florida State University, Tallahassee, USA
Publication date: 03 July 2018
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