Table 5. Principal component analysis.
| PC | ||
| Parameter | 1 | 2 |
| Total Phytoplankton biomass (µg chl-a L−1) | .983 | −.156 |
| Cyanobacterial biomass (µg chl-a L−1) | .982 | −.159 |
| Cyanobacterial fraction (%) | .729 | −.671 |
| H’Phyto | −.889 | .442 |
| Microcystin concentration (µg L−1) | .988 | −.113 |
| Adult Daphnia (mg DM L−1) | −.168 | .971 |
| Juvenile Daphnia (mg DM L−1) | −.129 | −.464 |
| Ceriodaphnia (mg DM L−1) | −.403 | .543 |
| Calanoid copepoda (mg DM L−1) | −.061 | .213 |
| Cyclopoid copepoda (mg DM L−1) | .990 | −.072 |
| Bosmina (mg DM L−1) | −.157 | .692 |
| Ostracoda (mg DM L−1) | −.148 | −.246 |
| Total zooplankton (mg DM L−1) | −.195 | .129 |
| H’Zoo | −.295 | .922 |
| Ratio Daphnia : calanoid copepoda | −.234 | .506 |
| % variance | 37.6 | 25.8 |
Principal component analysis (PCA) of 15 main parameters that describe the sampling sites. Eigenvectors of the first two principal components (PC), that explain a total of 63.3% of the variation, are given. Bold numbers depict major contrasts. DM = dry mass. The bottom line shows the percentage of variation explained by the respective PC.