Table 2.
Weighted correlation matrix showing the relationships between OTU axes and environmental variables.
| Heavy metals (ppm) | LC |
HB |
SLR |
|||
|---|---|---|---|---|---|---|
| Axis 1 | Axis 2 | Axis 1 | Axis 2 | Axis 1 | Axis 2 | |
| V | −0.1218 | −0.174 | 0.5192 | −0.464 | −0.6598 | 0.1421 |
| Cr | −0.0291 | −0.4455 | 0.3533 | −0.547 | −0.4957 | 0.2810 |
| Co | −0.0598 | 0.5549 | 0.6356 | −0.4342 | −0.3300 | 0.3183 |
| Ni | 0.1005 | −0.4973 | 0.4367 | −0.4536 | −0.2117 | 0.3611 |
| Cu | 0.0773 | −0.2347 | 0.4933 | −0.3405 | 0.0845 | 0.4293 |
| Zn | 0.0762 | 0.9036 | 0.2873 | −0.2502 | 0.2989 | 0.8420 |
| Hg | 0.7057 | −0.4008 | 0.1366 | −0.1411 | 0.7263 | −0.1899 |
| As | 0.5242 | 0.0560 | 0.1992 | −0.6720 | 0.8680 | 0.0094 |
| Se | 0.2599 | 0.1956 | 0.2976 | −0.0247 | 0.5057 | 0.8242 |
| Mo | −0.1019 | −0.2265 | 0.2932 | −0.4624 | 0.8483 | 0.3074 |
| Cd | −0.0784 | 0.4242 | 0.1914 | −0.4372 | 0.0050 | 0.5001 |
| Sb | −0.0635 | 0.3020 | 0.0283 | 0.6048 | −0.0301 | 0.2426 |
| Pb | 0.2412 | −0.0013 | 0.4615 | −0.4401 | 0.1233 | 0.5349 |
| U | 0.0022 | 0.0913 | 0.6078 | −0.2582 | −0.4108 | 0.6724 |
| Eigenvalues | 0.672 | 0.632 | 0.557 | 0.459 | 0.530 | 0.275 |
| Cumulative percentage variance of OUT-environment relation | 26.2 | 50.7 | 31.7 | 57.8 | 47.2 | 71.6 |
Heavily and medium contaminated stations: LC, Licunhe estuary; HB, Haibohe estuary; Low-grade contaminated control station: SLR, Shilaoren Beach. Bold type indicates the three strongest factors correlated with the first two CCA ordination axes.