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BPoirier: Tree spatial pattern in Beau Poirier plot, Haye forest, France

Description

Spatial pattern of 162 beeches, 72 oaks and 3 hornbeams in a 1-ha 140 yr-old temperate forest plot in Haye, France.

Usage

data(BPoirier)

Format

A list with 8 components:
$rect is a vector of coordinates \((xmin,ymin,xmax,ymax)\) of the origin and the opposite corner of a 110 by 90 m rectangular plot.
$tri1 is a list of vertex coordinates \((ax,ay,bx,by,cx,cy)\) of contiguous triangles covering the denser part of the plot.
$tri2 is a list of vertex coordinates \((ax,ay,bx,by,cx,cy)\) of contiguous triangles covering the sparser part of the plot.
$poly1 is a list of vertex coordinates \((x,y)\) of the polygon enclosing BPoirier$tri1.
$poly2 is a list of two polygons vertex coordinates \((x,y)\) enclosing BPoirier$tri2.
$trees is a list of tree coordinates \((x,y)\).
$species is a factor with 3 levels \(("beech","oak","hornbeam")\) corresponding to species names of the trees.
$dbh is a vector of tree size (diameter at breast height in cm).

References

Goreaud, F. 2000. Apports de l'analyse de la structure spatiale en foret temperee a l'etude et la modelisation des peuplements complexes. These de doctorat, ENGREF, Nancy, France.

Pelissier, R. & Goreaud, F. 2001. A practical approach to the study of spatial structure in simple cases of heterogeneous vegetation. Journal of Vegetation Science, 12: 99-108.

Examples

data(BPoirier)
BP.spp <- spp(BPoirier$trees, mark=BPoirier$species, window=BPoirier$rect)
plot(BP.spp)