Table 6. Variance partitioning resulting from the partial canonical analyses of ecological and socioeconomical variables on species richness; data are for San Fernando.

Fraction of variation
Propor. of variation
F ratio
df
P
Ecological (a + b)
0.696
8.6
3,19
0.002
Socioeconomical (b + c)
0.745
4.0
7,19
0.05
Total variation
0.860
3.6
11,19
0.04
Fraction decomposed




Ecol. not explained by soc. (a)
0.115
1.4
4,7
n.s.
Soc. explained by ecol. (b)
0.581



Soc. not explained by ecol. (c)
0.164
1.0
8,7
n.s.
Unexplained variation (d)
0.140




Note: Calculations are explained in Table 4.