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Table 5
Results of multiple regression between Oligochaeta species composition and abiotic variables in the Iguaçu River, Brazil. Water temperature (WT), dissolved oxygen (DO), electrical conductivity (EC), organic matter (OM), Aluminum (Al) and Lead (Pb). Significant values in bold.
| Variables | Estimate | Standard error | T | p | |
|---|---|---|---|---|---|
| PCoA 1 | DO | –0.05 | 0.04 | –1.37 | 0.194 |
| EC | –0.01 | <0.01 | –2.40 | 0.033 | |
| pH | –0.16 | 0.08 | –2.12 | 0.055 | |
| OM | <0.01 | <0.01 | 1.30 | 0.215 | |
| Al | –0.10 | 0.04 | –2.49 | 0.028 | |
| Pb | 2.12 | 1.21 | 1.74 | 0.107 | |
| PCoA 2 | DO | –0.04 | 0.03 | –1.27 | 0.226 |
| EC | 0.01 | <0.01 | 3.28 | 0.006 | |
| pH | 0.13 | 0.07 | 1.80 | 0.096 | |
| OM | <–0.01 | <0.01 | –2.28 | 0.041 | |
| Al | –0.04 | 0.04 | –0.99 | 0.341 | |
| Pb | 1.87 | 1.17 | 1.58 | 0.137 | |
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