Fish community composition of the Doubs River, France.
DoubsContains three matrices:
Doubs.fish the abundance of 27 fish species.
Doubs.env 9 environmental variables (all quantitative).
Doubs.geo geographic information of the samples.
Values in Doubs.fish are counts of individuals of each of 27
species observed in a set of 30 sites located along the 453 km long
Doubs River, France (see Verneaux 1973 for further details about
fishing methods and effort).
Doubs.env contains 11 quantitative variables, namely the slope
(slo 1/1000) and mean minimum discharge (flo m³/s) of
the river, the pH of the water, its harness (Calcium concentration;
har; mg/L), phosphate (pho; mg/L), nitrate (nit;
mg/L), and ammonium (amm; mg/L), concentration as well as its
dissolved oxygen (oxy; mg/L) and biological oxygen demand
(bdo; mg/L).
Doubs.geo contains geographical information. Lon, the
longitude and Lat, the latitude of the sample (degree) as well
as DFS, its distance from the source of the river (km) and
Alt, altitude (m above see level).
Verneaux J. 1973. - Cours d'eau de Franche-Comté (Massif du Jura). Recherches écologiques sur le réseau hydrographique du Doubs. Essai de biotypologie. Thèse d'état, Besançon. 257 p.)
Verneaux, J.; Schmitt, V.; Verneaux, V. & Prouteau, C. 2003. Benthic insects and fish of the Doubs River system: typological traits and the development of a species continuum in a theoretically extrapolated watercourse. Hydrobiologia 490: 60-74
Borcard, D.; Gillet, F. & Legendre, P. 2011. Numerical Ecology with R. Springer, New-York, NY, USA.
data(Doubs)
summary(Doubs.fish)
summary(Doubs.env)
summary(Doubs.geo)
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