Table 1
Main characteristics of the three mesohabitats investigated in this study. Microhabitat composition: sand = <0.2 cm, gravel = 0.2–2 cm, microlithal = 2–6 cm, mesolithal = 6–20 cm, macrolithal = 20–40 cm, megalithal = >40 cm (Buffagni and Erba, 2007); the average depth was measured at a flow rate of 1.2 m3/s by sampling at least 15 points.
| Characteristics | Pool | Riffle | Step-pool |
|---|---|---|---|
| Length (m) | 17 | 18 | 13 |
| Upstream width (m) | 9.5 | 13 | 7 |
| Downstream width (m) | 9.5 | 18 | 8 |
| Average depth (cm) | 46 | 21 | 31 |
| Elevation (m aslm) | 677 | 670 | 647 |
| Microhabitat composition | 40% sand-gravel 20% gravel 20% microlithal 20% macrolithal |
40% microlithal 40% mesolithal 20% macrolithal |
40% gravel/microlithal 40% macrolithal 20% megalithal |
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