Hi folk,

I am working on tropical forest dynamic trying to find out "patches" of young, adult or suppressed trees. Each tree has XY coordinates and I consider my data as a multitype point pattern (ppt), handling data with spatstat. Actually I consider each mark separately and delineate areas of aggregation (contour(density(ppt)). Then, I superimpose these high-density areas on the same map and look at non-overlapping regions. This is not very satisfying and I would like to go a step further in interpreting areas of e.g. low density of adult trees and high density of suppressed trees. I could not find any reference in the literature dealing with more than 2 types...

Did anyone already deal with similar problem?? Any suggestion will be greatly helpful.

Thanks. Best,
Ervan
___________________________________________________________

Ervan Rutishauser
PhD student
CIRAD - UMR AMAP
BP 701
97387 Kourou Cedex
tel. 00594.594.32.92.96



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