Ecological Data : sites-variables, sites-species, where and when

Description

This data set contains information about sites, environmental variables and Ephemeroptera Species.

Usage

data(meau)

Format

meau is a list of 3 components.

env

is a data frame with 24 sites and 10 physicochemical variables.

fau

is a data frame with 24 sites and 13 Ephemeroptera Species.

design

is a data frame with 24 sites and 2 factors.

• season: is a factor with 4 levels = seasons.

• site: is a factor with 6 levels = sites.

Details

Data set equivalents to meaudret, except that one site (6) along the Bourne (a Meaudret affluent) and one physico chemical variable - the oxygen concentration were added.

Source

Pegaz-Maucet, D. (1980) Impact d'une perturbation d'origine organique sur la dérive des macro-invertébrés benthiques d'un cours d'eau. Comparaison avec le benthos. Thèse de troisième cycle, Université Lyon 1, 130 p.

Thioulouse, J., Simier, M. and Chessel, D. (2004) Simultaneous analysis of a sequence of paired ecological tables. Ecology, 85, 1, 272–283.

Examples

data(meau)
pca1 <- dudi.pca(meau$env, scan = FALSE, nf = 4)
pca2 <- bca(pca1, meau$design$season, scan = FALSE, nf = 2)

if(adegraphicsLoaded()) {
  g1 <- s.class(pca1$li, meau$design$season, psub.text = "Principal Component Analysis", plot = F)
  g2 <- s.class(pca2$ls, meau$design$season, 
    psub.text = "Between seasons Principal Component Analysis", plot = FALSE)
  g3 <- s.corcircle(pca1$co, plot = FALSE)
  g4 <- s.corcircle(pca2$as, plot = FALSE)
  G <- ADEgS(list(g1, g2, g3, g4), layout = c(2, 2))
  
} else {
  par(mfrow = c(2, 2))
  s.class(pca1$li, meau$design$season, 
      sub = "Principal Component Analysis")
  s.class(pca2$ls, meau$design$season, sub = "Between seasons Principal Component Analysis")
  s.corcircle(pca1$co)
  s.corcircle(pca2$as)
  par(mfrow = c(1, 1))
}