Table 1. General linear modelling (given are partial η2 values) indicated cave length to be positively (indicated by the + sign) associated with local cave-dwelling springtail species richness (α-diversity).
The dominant eigenvector of the cave Euclidean distance matrix (EV1) served as covariate to account for possible spatial non-independence of richness and phylogenetic relatedness. The net relatedness index increased with richness and decreased with geographical distance of caves. N = 189.
| Variable | a-diversity | NRI |
|---|---|---|
| Altitude | <0.01 | <0.01 |
| Cave length | (+) 0.07*** | <0.01 |
| Cave depth | <0.01 | <0.01 |
| Species richness | - | (+) 0.04** |
| EV1 | <0.01 | (-) 0.03** |
**: P(F) < 0.01
*** P(F) < 0.001