Figure 4. 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 indicates
the strength of this correlation.