Fish community composition of the Doubs River, France.
data(Doubs)Contains three matrices:
The abundance of 27 fish species.
Nine environmental variables (all quantitative).
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).
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).
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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