Table 1.
Candidate physical habitat structure and water quality variables (from Ferreira et al., 2014)
| Variables group and name | Variable code |
|---|---|
|
| |
| Channel morphology | |
| Mean depth of cross-section (cm) | xdepth_s |
| Mean wetted width (m) | xwidth |
| Mean bankfull width (m) | xbkf_w |
| Mean residual depth (cm) | rp100 |
| Channel water surface slope - reach mean (%) | xslope |
| Channel sinuosity (m.m−1) | Sinu |
| Bed substrate | |
| Mean embeddedness of channel and margin (%) | xembed |
| Standard deviation of embeddedness in channel + margin (%) | vembed |
| Log10 (Relative bed stability) | lrbs* |
| Substrate - log10(geometric mean diameter mm) | lsub_dmm* |
| Substrate % cobbles (diameter 64 – 250 mm) | pct_cb |
| Riparian | |
| Mean mid-channel canopy density (%) | xcdenmid |
| Standard deviation - mid-channel canopy density (%) | vcdenmid |
| Riparian vegetation canopy+mid+ground cover (%) | xcmg |
| Flow type | |
| Glide (% of reach) | pct_gl |
| Pools - all types (% of reach) | pct_pool |
| Slow water habitat (% glide + pool) | pct_slow |
| Shelter | |
| Coarse litter (%) | pct_bf |
| Large wood debris in bankfull channel (number/m2 - all size classes) | c1w_msq |
| Brush and small debris (areal proportion) | xfc_brs |
| Undercut banks (areal proportion) | xfc_ucb |
| Anthropogenic fish cover (areal proportion) | xfc_ant |
| Water quality | |
| Dissolved oxygen (mg.L−1) | DO |
| Negative log hydrogen ion concentration | pH |
| Turbidity (NTU) | Turbidity |
| Total nitrogen (mg.L−1) | N-total |
| Electrical conductivity (μS.cm−1) | Cond. |
| Total dissolved solids (mg.L−1) | TDS |
| Temperature of water | T 0C |
*
lrbs and lsub_dmm (Kaufmann et al., 2008).