meau {ade4}R Documentation

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.

mil
is a data frame with 24 sites and 10 physicochemical variables.
fau
is a data frame with 24 sites and 13 Ephemeroptera Species.
plan
is a data frame with 24 sites and 2 factors.
    dat
    is a factor with 4 levels-seasons.
    sta
    is a factor with 6 levels-sites.

Details

Data set equivalents to meaudret: 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)
par(mfrow = c(2,2))
pca1 <- dudi.pca(meau$mil, scan = FALSE, nf = 4)
s.class(pca1$li, meau$plan$dat, 
    sub = "Principal Component Analysis")
pca2 <- between(pca1, meau$plan$dat, scan = FALSE, nf = 2)
s.class(pca2$ls, meau$plan$dat, sub = "Between dates Principal Component Analysis")
s.corcircle(pca1$co)
s.corcircle(pca2$as)

[Package ade4 version 1.4-14 Index]