A Field-Based Time Geography for Wildlife Movement Analysis

20 minutes
Time geographyGPS trackingwildlifecaribouleast-cost pathMovement analysis
Field-based time geography is proposed as a new, specialized model for estimating wildlife utilization distributions (UDs) and home ranges. Field-based time geography represents the combining of classical time geography with least-cost path analysis. Here the derivation of field-based time geography is emphasized, paying particular attention to how it can be implemented in wildlife analysis. An example showing caribou movement in northern British Columbia is used to demonstrate field-based time geography and compare it with the Brownian bridge model, a popular method for delineating wildlife UDs. The results show how field-time geography is able to better represent the structure and barriers of the landscape, and provide alternative insights into wildlife space use. The entire process is implemented in R, making it attractive to movement ecologists.
University of St Andrews

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