Correlation among observations within the same site was
0.53. Inter-annual trends of the EVI_mean were significantly related to the inter-annual rises in annual accumulated precipitation
(MAP_trends) through its interaction with lithology (Table 3).
Only the EVI_mean increases on marls and limestones were significantly
lower with MAP rises, but not on the remaining substrates.
EVI_mean increased significantly more with declines in MAT on
particular substrates. The greatest EVI_mean increases related to
MAT declines occurred on clays and silts, followed by limestones,
and conglomerates (marls almost significantly showed the same
effect). MAT declines were not significantly related to EVI_mean
increases on sandstones and phyllites (Table 3). The EVI_mean trends
also differed among vegetation types. Grasslands significantly tended
to show higher EVI_mean trends than scrublands, particularly
on clays and silts. Lithology played an important role in determining
the EVI_mean inter-annual trends. In addition to the interactions
between lithological substrates and vegetation and climatic factors
trends, the EVI_mean inter-annual positive trends were significantly
greater on marls (and almost significantly on sandstones and phyllites
and schists) than in the remaining substrates (Table 3). Vegetation
type and lithology showed the highest partial R2 (0.23 in both
cases, Table 3).