[R-sig-Geo] Producing ENFA derived suitability maps with adehabitat

[Alexandre VILLERS]

Dear list(s) 'members,

I have a dataset representing the position of a species over a large 
region for 3 different years (2000, 2004 and 2008) and seven 
ecogeographical variables. Given that the study takes place on an 
agricultural region, the landscape changes every year at fine scale and 
there is a long term trend in crops sowed, leading me to account for 
between years variability.
I would like to use the niche determined by the landscape and location 
of birds in 2000 and then, appply this niche over the landscape in 2004 
and 2008 (this would, I believe, give me a first answer on whether 
changes in birds' location are due to a decrease in habitat suitability 
or birds).
I have already computed ENFA with adehabitat (using the doc provided 
with the package "adehabitat" and the www.spatial-analyst.net of T. 
Hengl) but I don't see how exactly using the result of an ENFA on a 
"new" landscape...

Any link or help would be welcome.

Alex

-- 
Alexandre Villers
PhD Student
Team "Biodiversity"
Centre d'Etudes Biologiques de Chizé-CNRS UPR1934
79360 Beauvoir sur Niort

Phone +33 (0)5 49 09 96 13
Fax   +33 (0)5 49 09 65 26




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