Predictor Variables Description

ALKALINITY

Total carbonates. (mg/l)

ALTITUDEPOW0.4

Altitude. (m to the power 0.4)

ALTITUDEPOW0.5

Altitude. (m to the power 0.5)

BICARBONATES

Bicarbonates. (mg/l)

BICARBPOW0.4

Bicarbonates. (mg/l to the power 0.4)

CATCHAREAPOW-0.1

Catchment area upstream of site. (square km to the power -0.1)

CATCHAREAPOW-0.2

Catchment area upstream of site. (square km to the power -0.2)

DFSPOW-0.3

Distance from source. (km to the power -0.3)

DFSPOW-0.4

Distance from source. (km to the power -0.4)

EDGEAREA

Percent area of edge habitat in reach. (%)

LATITUDE

Latitude of site. ACT, SA - (degrees & minutes as: ddmm (omit negative sign)); NT, Vic, WA, Qld State - (decimal degrees to 4dp (omit negative sign)); NSW, Qld Regional, South Coast Livepick - (decimal degrees to 4dp); Tas - (degrees, minutes and seconds as: ddmmss0 (omit negative sign, add trailing 0)); Thredbo - (degrees, minutes and seconds as: ddmmss (omit negative sign)); Alps, South Coast Labsort - (degrees and decimal minutes as: ddmm.mmmm).

LOG10BOULDER

Log 10 [x+1] percent Boulder in habitat. (log 10 [% + 1])

LOG10COBBLE

Log 10 [x+1] percent Cobble in habitat. (log 10 [% + 1])

LOG10COND

Log 10 [x+1] Conductivity. (log 10 [uS/cm + 1])

LOG10DEPTHCMCAT

Log 10 [x+1] Mean depth category of habitat: 1 = less than 25cm; 2 = 25-50cm; 3 = 50-100cm; 4 = 100-200cm; 5 = greater than 200cm. (log 10 [category + 1])

LOG10DFS

Log 10 [x+1] percent Gravel in habitat. (log 10 [% + 1])

LOG10GRAVEL

Log 10 (x+1) % gravel in habitat

LOG10SLOPE1KUS

Log 10 (x+1) Slope: The difference in elevation in metres between the site and a point 1km upstream

LOG10STORDER

Log 10 [x+1] Stream Order: category based on the degree of branching [1, 2, 3, ....]. (log 10 [Category + 1])

LOGBEDROCK

Log 10 [x+1] percent Bedrock in HABITAT (SA) or REACH (Vic). ( log 10 [% + 1] )

LONGITUDE

Longitude of site. ACT, SA - (degrees & minutes as: dddmm); NSW, NT, Qld State & Regional, Vic, WA - (decimal degrees to 4dp); South Coast Labsort, Alps - (degrees and decimal minutes as: dddmm.mmmm); Tas - (degrees, minutes and seconds as: ddmmss (omit negative sign, omit leading 1)); Thredbo - (degrees, minutes and seconds as: dddmmss); South Coast Livepick - (N/A).

MEDSEDPOW0.7

Percent medium sediment [percent pebble + percent gravel] to the power 0.7. (% to the power 0.7)

PEBBLEPOW0.5

Percent pebble [16-64mm] in habitat to the power 0.5. (% to the power 0.5)

RIFFAREAPOW0.5

Percent area of riffle habitat at the site to the power 0.5. (% to the power 0.5)

RIFFAREAPOW0.8

Percent area of riffle habitat at the site to the power 0.8. (% to the power 0.8)

SHADINGPERCENT

% shading (estimated % stream shaded during daylight hours)

SHADPERCENTPOW0.5

Shading to the power 0.5: percent of stream shaded during daylight hours. (% to the power 0.5)

SHADPERCENTPOW0.8

Shading to the power 0.8: percent of stream shaded during daylight hours. (% to the power 0.8)

SLOPE1KUSPOW0.2

Slope to the power 0.2: Elevation difference in metres between the site and a point 1km upstream. (m to the power 0.2)

STWIDTHPOW-0.3

Mean width of water to the power -0.3. (m to the power -0.3)