Bi-plot of a Canonical Correspondence Analysis (CCA)
of ant species composition. The analysis deals with 48 ant
species related to 3 factors (temperature, humidity and
precipitation). A positive mark indicates the optima of
individual species in the two-dimensional environmental
space described by ordination axes 1 and 2, in which the
relationships show no significant differences. Vectors
show the correlations between an environmental factor
and the two ordination axes, where the vector length indi-
cates the strength of this correlation.