Table 7. Variance partitioning resulting from the partial canonical analyses of ecological and socioeconomical variables on species richness; data are for San Miguel.

Fraction of variation
Proportion of variation
F ratio
df
P
Ecological (a + b)
0.325
10.4
1,45
0.001
Socioeconomical (b + c)
0.371
3.8
5,45
0.004
Total variation
0.502
4. 7
7,45
0.001
Fraction decomposed




Ecol. not explained by soc. (a)
0.131
4.85
2,37
0.05
Soc. explained by ecol. (b)
0.194



Soc. not explained by ecol. (c)
0.177
2.2
6,37
n.s.
Unexplained variation (d)
0.498





Note: Calculations are explained in Table 4.