Characteristics of river reference sites
Data on river sites was matched with data on fish caught at
nearby fishing sites. Fishing sites were classified according
to type of fish (
Group = fish river type).
A data frame with 128 observations on the following 23 variables.
Fish river types; a factor with levels
mgm/l of CaCO3
mean annual rainfall, mm
% cover on river edge attached to substratum
numeric, % cover of stones > 200mm diameter
numeric, % cover of stones between 60 \& 200mm
electrical conductivity (mu S/cm)
maximum distance from source (m)
numeric, dissolved O2, % saturation
nearest contour line (m) below site
numeric, % cover of particles < 0.02mm
numeric, % cover of particles between 2 \& 20mm
total oxidised Nitrogen (mgl/l)
numeric, % cover of stones between 20 \& 60mm
a numeric vector
numeric, % cover of particles between 0.02 \& 2mm
numeric, elevatioon difference (m) between site \& a point 1km upstream
total Kjeldahl Nitrogen (mgl/l)
total Phosphorus (mgl/l)
modal river width (m), assessed visually
To what extent can the fish river type be predicted, based on: (i) all
explanatory variables; (ii) the variables
Slope. The second set
comprises the variables that would be used in practice to predict
the fish river type at other sites.
Data relate to Turak and Koop (2007).
Turak, E and Koop, K. Multi-attribute ecological river typology for assessing ecological condition and conservation planning. Hydrobiologica 603:83-104, 2007.
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