R: Vegetation and Environment in Dutch Dune Meadows.
dune
R Documentation
Vegetation and Environment in Dutch Dune Meadows.
Description
The dune meadow vegetation data, dune, has cover class values
of 30 species on 20 sites. The corresponding environmental data frame
dune.env has following entries:
Usage
data(dune)
data(dune.env)
Format
dune is a data frame of observations of 30 species at 20
sites. The species names are abbreviated to 4+4 letters (see
make.cepnames). The following names are changed from
the original source (Jongman et al. 1987): Leontodon
autumnalis to Scorzoneroides, and Potentilla
palustris to Comarum.
dune.env is a data frame of 20 observations on the following
5 variables:
A1:
a numeric vector of thickness of soil A1 horizon.
Moisture:
an ordered factor with levels: 1 < 2 <
4 < 5.
Management:
a factor with levels: BF (Biological
farming), HF (Hobby farming), NM (Nature
Conservation Management), and SF (Standard Farming).
Use:
an ordered factor of land-use with levels: Hayfield
< Haypastu < Pasture.
Manure:
an ordered factor with levels: 0 < 1 <
2 < 3 < 4.
Source
Jongman, R.H.G, ter Braak, C.J.F & van Tongeren,
O.F.R. (1987). Data Analysis in Community and Landscape
Ecology. Pudoc, Wageningen.