Table 3.
Results of multi-response permutation procedures (MRPP) of pairwise comparisons to test for differences in riparian plant community composition among plots before and after treatment, among control plots for 2011 and 2012, and among anchor-ice-rich and anchor-ice-free reaches. A highly negative T represents a strong separation between the groups: A < 0 with more heterogeneity within groups than expected by chance; A = 0 when heterogeneity within groups equals expectation by chance; A = 1 when all items are identical within groups. Significant values are indicated in bold (P < 0.05).
| Experiment | Treatment | T | A | P |
|---|---|---|---|---|
| Multiple flooding | Before vs. after | 1.634 | −0.033 | 0.99 |
| Control 2011 vs. 2012 | −0.253 | 0.0005 | 0.331 | |
| Anchor-ice free vs. rich | −2.312 | 0.048 | 0.023 | |
| Extended flooding | Before vs. after | 2.104 | 0.0077 | 1.0 |
| Control 2011 vs. 2012 | 1.183 | 0.005 | 0.935 | |
| Anchor-ice free vs. rich | −14.941 | 0.054 | <0.0001 |