vegan (version 2.6-8)

dune: 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.

%\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), and SF (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}}

Examples

data(dune)
data(dune.env)