Vegetation and Environment in Dutch Dune Meadows.
dune.RdThe 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:
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.
%\item{Moisture}{\code{1} < \code{2} < \code{4} < \code{5}}
- Management:
a factor with levels:
BF(Biological farming),HF(Hobby farming),NM(Nature Conservation Management), andSF(Standard Farming).
%\item{Management}{\code{BF}: Biological Farming }
%\item{Management}{\code{HF}: Hobby Farming }
%\item{Management}{\code{NM}: Nature Conservation Management }
%\item{Management}{\code{SF}: Standard Farming }
- Use:
an ordered factor of land-use with levels:
Hayfield<Haypastu<Pasture.
%\item{Use}{\code{Hayfield} < \code{Haypastu} < \code{Pasture}}
- Manure:
an ordered factor with levels:
0<1<2<3<4.
%\item{Manure}{\code{0} < \code{1} < \code{2} < \code{3} < \code{4}}