Figure legends
Figure 1. A) Known distribution range of Psammodromus
algirus (based on Bons and Geniez 1996 [north-west Africa] and
Pleguezuelos 1997 [Iberian Peninsula]). The gaps within the range
that correspond to artificial land uses according to Corine database
wereconsidered as presences when embedded within the range. A question
mark is placed where the species is known to inhabit but there is no
accurate information about its distribution (27 presences scattered all
over North Africa; grey squares in the figure). The discontinuous line
defines the assumed southern edge of the distribution range according to
IUCN. B) Bioclimatic gradient defined by the environmental PCA for all
the western Mediterranean region (potential distribution range ofP. algirus ). Black circles mark the location of the sampled
populations (L = Lerma, B = Brihuega, N = Navacerrada, P = El Pardo, and
A = Aranjuez). On the right, the location of these populations and range
edges (C/W = coldest/wettest, W/D = warmest/driest) within the
environmental gradient from a single PC axis that was defined by using
the scree plot criterion.
Figure 2. Distribution of adjusted R2 values
for regression models obtained with four different randomized datasets
(see text for details).
Figure 3. Inferred distribution range. In dark green, predicted
range #1 (grid cells with the same environmental scores than the
sampled populations); and in clear green, predicted range #2 (inferred
by extrapolating GEAM to any possible combination of alleles at the loci
included in the final model). All cells within predicted range #1 were
also included in range #2. Areas beyond 8 km of the continuum inferred
range were removed (see text).
Figure 4. Inferred distribution ranges #1 (cells with same
environmental values than sampling locations; A) and #2 (cells that
were inferred to be suitable for any possible combination of alleles at
the loci included in our GEAM; B) at the resolution scale that was
comparable with previously published ranges.
Figure 5. Distribution of the proportion of the actual species’
range that was inferred by completely randomized datasets incorporating
the outlier selection step (see text for details). The proportion of
range inferred by extrapolation of GEAM is marked with an arrow.
Figure 6. Heatmap representing the number of adapted genotypes
per grid cell according to our GEAM.