spatstat.data (version 3.1-2)

sporophores: Sporophores Data

Description

Spatial pattern of sporophores of three species of fungi around a tree.

Usage

data(sporophores)

Format

A multitype spatial point pattern (an object of class "ppp" with factor-valued marks indicating the species). Spatial coordinates are given in centimetres. Levels of the species variable are "L laccata", "L pubescens" and "Hebloma spp".

Details

Ford, Mason and Pelham (1980) studied the spatial locations of sporophores of three species of mycorrhizal fungi distributed around a young birch tree in agricultural soil. The dataset given here is the spatial pattern in the fifth year after the tree was planted. The species are Laccaria laccata, Lactarius pubescens and Hebloma spp.

References

Ford, E.D., Mason, P.A. and Pelham, J. (1980) Spatial patterns of sporophore distribution around a young birch tree in three successive years. Transactions of the British Mycological Society 75, 287--296.

Examples

  if(require(spatstat.geom)) {
## reproduce Fig 1 in Ford et al (1980)
plot(sporophores, chars=c(16,1,2), cex=0.6, leg.args=list(cex=1.1))
points(0,0,pch=16, cex=2)
text(15,8,"Tree", cex=0.75)
  }