Modelling badger migration using Distance Spatial Analysis Tools

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# Modelling badger migration using Distance Spatial Analysis Tools - PowerPoint PPT Presentation

Modelling badger migration using Distance Spatial Analysis Tools. a.k.a. The story of 2 lonesome badgers. Bert Meeus. Once upon a time. a forest. A peaceful forest!. But suddenly. A hungry bear!. Charlie is so lonely!. snif. Elsewhere at the same time. another forest. a forest.

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Presentation Transcript

### Modelling badger migration using Distance Spatial Analysis Tools

a.k.a.

The story of 2 lonesome badgers

Bert Meeus

Elsewhere at the same time ...

another forest

a forest

Another peaceful forest!

I am so lonely!

I‘m outta here!

The question

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

Assumptions

The chance on successful migration will

depend on:

• Distance between forests
• Landscape in between forests

Modelling through Distance Tools (Spatial Analyst)

Full model

Model 1

Model 2

Model 3

Model 1

Assumption: chance on successful migration will depend only on distance between forests

It’s too far!!!

Model 1

Euclidian distance

between forests

=

69231.156476 m

Model 2

Assumptions: chance on successful migration will depend on:

• Distance between forests
• Landscape in between forests

Model 3

Assumptions: chance on successful migration will depend on:

• Distance between forests
• Landscape in between forests

Model 3: corridor

Dark green: most likely path for badgers to move between forests

Light green: alternative paths

Model 3

Volume = 456016578860858.19 m³

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?