Table 3
Summary (p-values) of ANOVAS comparing leaf decay and invertebrate parameters in mesh bag samples, as well as periphyton parameters, on nutrient diffusing substrates between nutrient and flow treatments; samples were taken 5 (round 1) and 4 (round 2) days after the cessation of the three days long flow event; significant effects (p < 0.05) are marked in bold, p-values < 0.1 are marked in italics.
| Dependent variable | Flow increase | Ranking | Nutrients | Ranking | Flow x nutrients | Type of interaction |
|---|---|---|---|---|---|---|
| Leaf litter decomposition rate | ||||||
| Coarse mesh bags (k) | 0.062 | Control < flood | 0.295 | 0.175 | ||
| Fine mesh bags (k) | 0.818 | 0.034 | Control < nutrients | 0.058 | ||
| Coarse-fine (k) | 0.221 | 0.580 | 0.052 | |||
| Drift | ||||||
| Number of drifting individuals | 0.311 | 0.006 | Control < nutrients | 0.507 | ||
| Invertebrates in coarse mesh bags | ||||||
| Total invertebrate density | 0.094 | Control < flood | 0.353 | 0.774 | ||
| Taxon richness | 0.274 | 0.778 | 0.981 | |||
| EPT richness | 0.422 | 0.880 | 0.880 | |||
| Shannon-Wiener diversity | 0.361 | 0.999 | 0.896 | |||
| % rheophile | 0.955 | 0.074 | Nutrients < control | 0.264 | ||
| Proportion of grazers/scrapers | 0.981 | 0.747 | 0.973 | |||
| Proportion of shredders | 0.883 | 0.027 | Nutrients < control | 0.704 | ||
| Proportion of gathering collectors | 0.317 | 0.264 | 0.703 | |||
| Proportion of predators | 0.535 | 0.044 | Control < nutrients | 0.480 | ||
| Periphyton | ||||||
| Total Chl a | 0.002 | Control < flood | <0.001 | Control < nutrients | 0.014 | Antagonistic |
| Cyanobacteria (Chl a) | 0.076 | Control < flood | 0.003 | Control < nutrients | <0.001 | Antagonistic |
| Diatoms (Chl a) | 0.001 | Control < flood | <0.001 | Control < nutrients | <0.001 | Antagonistic |
| Green algae (Chl a) | 0.093 | Control < flood | <0.001 | Control < nutrients | 0.523 | |
| Biovolume Cyanobacteria | 0.349 | 0.083 | Control < nutrients | 0.610 | ||
| Biovolume green algae | 0.562 | 0.145 | 0.540 | |||
| Biovolume diatoms | 0.658 | 0.054 | Control < nutrients | 0.116 | ||
| Total biovolume | 0.819 | 0.114 | 0.305 | |||
| Taxon richness | 0.384 | 0.793 | 0.740 | |||
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