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Related Experiment Videos

Topographic effects on spatial data at a Japanese macaque study site.

D S Sprague1

  • 1Rural Ecosystem Dynamics, Division of Environmental Planning, National Institute of Agro-Environmental Sciences, Tsukuba, Ibaraki, Japan. sprague@niaes.affrc.go.jp

American Journal of Primatology
|November 15, 2000
PubMed
Summary

Topography significantly impacts wildlife spatial ecology. This study found that Japanese macaque travel distances and home ranges are larger in mountainous terrain than previously measured on flat maps, highlighting the importance of 3D terrain analysis.

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Area of Science:

  • Wildlife Ecology
  • Spatial Analysis
  • Geographic Information Systems (GIS)

Background:

  • Traditional spatial analyses often use 2D maps, underestimating distances and areas in complex terrains.
  • Accurate home range and travel distance estimations are crucial for understanding animal behavior and resource use.
  • Mountainous environments present unique challenges for spatial data interpretation.

Purpose of the Study:

  • To quantify the increase in spatial measures (travel distance, home range area) when accounting for topography.
  • To compare 2D flat map measurements with 3D computerized terrain model measurements.
  • To analyze variations in spatial measure increases across different Japanese macaque troops and individual routes.

Main Methods:

  • Collected spatial data for Japanese macaques at a mountainous study site.

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  • Utilized a computerized terrain model to incorporate topographical data.
  • Compared spatial measurements derived from the 3D terrain model against traditional 2D flat map measurements.

    • Main Results:

    • Both travel distances and home range areas were significantly larger when measured using the 3D terrain model compared to the 2D flat map.
    • The magnitude of increase in spatial measures varied between different macaque troops.
    • Individual travel routes exhibited variability in how much their measured distances changed with the inclusion of topography.

    Conclusions:

    • Accounting for mountainous topography is essential for accurate spatial ecology studies of wildlife.
    • Underestimation of travel distances and home range areas can occur if 3D terrain is not considered.
    • Future wildlife spatial analyses should incorporate 3D terrain models for improved ecological insights, especially in rugged landscapes.