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The Migration of Two Badgers: A Spatial Analysis Tale

Dive into the story of two lonesome badgers, Bert and Winnie, and discover the challenges they face in reuniting to repopulate a forest. Explore the use of Distance Spatial Analysis Tools to model their migration chances based on forest distances, landscape features, and random movements. Witness the three models developed to predict successful migration and learn about the implications of each model’s findings. Uncover the potential and limitations of using Spatial Analyst tools for animal migration studies and ponder the complexities of converting spatial values to migration probabilities.

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The Migration of Two Badgers: A Spatial Analysis Tale

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  1. Modelling badger migration using Distance Spatial Analysis Tools a.k.a. The story of 2 lonesome badgers Bert Meeus

  2. Once upon a time... a forest

  3. A peaceful forest!

  4. But suddenly...

  5. A hungry bear!

  6. Charlie is so lonely! snif

  7. Elsewhere at the same time ... another forest a forest

  8. Another peaceful forest! I am so lonely! I‘m outta here!

  9. The question What is the chance that Winnie will find Charlie so they can have little baby badgers to repopulate Charlie's forest?

  10. Assumptions The chance on successful migration will depend on: • Distance between forests • Landscape in between forests • Random movements of badger Modelling through Distance Tools (Spatial Analyst)

  11. Full model Model 1 Model 2 Model 3

  12. Input: land cover map

  13. Model 1 Assumption: chance on successful migration will depend only on distance between forests It’s too far!!!

  14. Model 1 Euclidian distance between forests = 69231.156476 m

  15. Model 2 Assumptions: chance on successful migration will depend on: • Distance between forests • Landscape in between forests

  16. Model 2

  17. Model 2: Cost Distance

  18. Model 2: Cost Distance

  19. Model 2: Cost Path

  20. Model 2: Cost Path

  21. Model 3 Assumptions: chance on successful migration will depend on: • Distance between forests • Landscape in between forests • Random movements of badger

  22. Model 3

  23. Model 3: Corridor

  24. Model 3: Corridor + =

  25. Model 3: corridor Dark green: most likely path for badgers to move between forests Light green: alternative paths

  26. Model 3 Volume = 456016578860858.19 m³

  27. Conclusions Distance Tools of Spatial Analyst can be used to model animal migration! Problems: * Very slow for large images * How convert values for Euclidean Distance, Path Cost and Corridor Volume to migration chances?

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