Appendix C. Results from nested subset, fourth-corner, and functional composition analyses.
Table C1. Results from nested subset analysis and fourth corner statistics using the random (1) permutation model. The d statistic measures within-group homogeneity while the r statistic expresses the correlation between traits and environmental variation. Note that d and r statistics for fourth corner statistics were evaluated only if global F statistics were significant.
Trophic level Dispersal Global F statistic F = 0.01
P = 0.914
F = 2.19
P = 0.385
Trait class Predators Non-predators Active Passive Statistic d = 0.47
P = 0.120
r = 0.01
P = 0.481
d = 0.53
P = 0.893
r = - 0.01
P = 0.481
d = 0.68
P = 0.022
r = 0.10
P = 0.046
d = 0.31
P = 0.970
r = - 0.10
P = 0.046
Table C2. Functional composition of pond taxa in relation to the composition of the local species pool and permanence.
Functional groups
Proportion in local species pool
Pond mean ± SD
Departure from local species pool
Relationship to permanence
Percent predators
0.50
0.54 ± 0.17
NS
NS
Percent non-predators
0.50
0.46 ± 0.17
NS
NS
Percent active dispersers
0.77
0.72 ± 0.21
NS
NS
Percent passive dispersers
0.23
0.28 ± 0.21
NS
NS
Predator : prey taxa
1.02
1.10 ± 0.49
NS
NS
Loge-density predators: density non-predators
0.51
0.51 ± 0.26
NS
NS