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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