Table 3.
Variables that contribute to the discrimination of single taxon dominated Daphnia communities. (Variables were identified using a stepwise DFA with forward selection. The lower the Wilks' λ the higher is the discriminatory power of the entire model. The lower the partial λ the higher is the contribution of the variable to the overall discrimination. Discrimination for D. galeata and D. hyalina dominance was based on all 43 lakes and for F1hg dominance, it was based on 28 lakes with information about the trophic lake history (historic dataset; table 1). Pgal, D. galeata; Phyl, D. hyalina; F1hg, D. galeata×D. hyalina; LA, latitude; LO, longitude; VO, lake volume; SU, lake surface; TE, temperature; PT, total phosphorus load; PM, maximal phosphorus load.)
| dominant Daphnia taxon | variable | Wilks' λ | partial λ | d.f. | F | p |
|---|---|---|---|---|---|---|
| Pgal | full model | 0.623 | — | 3,39 | 7.88 | <0.001 |
| TE | — | 0.722 | — | 15.03 | <0.001 | |
| LO | — | 0.866 | — | 6.03 | 0.019 | |
| PT | — | 0.975 | — | 1.00 | 0.322 | |
| Phyl | full model | 0.769 | — | 3,39 | 3.91 | 0.016 |
| PT | — | 0.831 | — | 7.93 | 0.008 | |
| LA | — | 0.943 | — | 2.37 | 0.132 | |
| SU | — | 0.966 | — | 1.37 | 0.248 | |
| F1hg | full model | 0.652 | — | 2,25 | 6.68 | <0.005 |
| PM | — | 0.737 | — | 8.92 | 0.006 | |
| LO | — | 0.874 | — | 3.62 | 0.069 |