GEOSTATS: correlations with spatially autocorrelated data
- Hi everybody,
As a part of an historical ecological research concerning colonization
processes of forest plants, I encountered the following problem :
In a +/- 25ha forest, I've mapped the forest ground flora on the basis of a
20m x 20m grid (a total of > 700 grid cells). Quite logically, the
distribution of the mapped plant species is not random, but exibits a high
degree of spatial autocorrelation (tested with a Moran coefficient). In
order to explain the spatial distributions of these plant species, I' m trying
to correlate them with reforestation age of the different forest parcels, pH,
My question : Since my data are not independent, is it necesarry to adjust the
classical correlation coefficients and what's the best - and most practical -
method to do so (random permutations??)??
Thanks in advance,
Laboratory for forest, nature and landscape research
Vital Decosterstraat 102, B-3000 Leuven
tel. : +32-16 329737 fax. : +32-16 329760
e-mail : kris.verheyen@...
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