spanish environmental variables map and krige

Hi All,

I' d like to do a map to represent biodiversity  in Spain and Portugal
using library "dismo" and represent also some other continous variables
like temperature and rain:

library(dismo)
lacerta<- gbif("Lacerta", geo=TRUE)

library(maps)
library(maptools)
library(mapdata)


m<- map('worldHires', regions=c('Spain', 'Portugal'), exact=T,
interior=FALSE, col="grey")
area.map(m)

points(lacerta$lon, lacerta$lat, cex=1.5, pch=19, col="blue")

Do you have any link to a guide or hints on how to  add environmental
variables: rain, temperature, climate, elevation, etc from Spain or/and
Europe?

   Another question is how to add environmental variables to this map and do
a krige?

Many many thanks for any help!

Toni Monle?n

Departament of Statistics
University of Barcelona