BPoirier {ads} | R Documentation |
Spatial pattern of 162 beeches, 72 oaks and 3 hornbeams in a 1-ha 140 yr-old temperate forest plot in Haye, France.
data(BPoirier)
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 vertice coordinates (ax,ay,bx,by,cx,cy) of contiguous triangles covering the denser part of the plot.
$tri2
is a list of vertice coordinates (ax,ay,bx,by,cx,cy) of contiguous triangles covering the sparser part of the plot.
$poly1
is a list of vertice coordinates (x,y) of the polygon enclosing BPoirier$tri1
.
$poly2
is a list of two polygons vertice coordinates (x,y) enclosing BPoirier$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.
$dbh
is a vector of tree size (diameter at breast height in cm).
Pardé, J. 1981. De 1882 à 1976/80 : les places d'expèrience de sylviculture du hetre en foret domainiale de Haye. Revue Forestière Française, 33: 41-64.
Goreaud, F. 2000. Apports de l'analyse de la structure spatiale en foret tempérée à l'étude et la modélisation des peuplements complexes. Thèse de doctorat, ENGREF, Nancy, France.
Pélissier, R. & Goreaud, F. 2001. A practical approach to the study of spatial structure in simple cases of heterogeneous vegetation. Journal of Vegetation Science, 12: 99-108.
data(BPoirier) BP.spp<-spp(BPoirier$trees,mark=BPoirier$species,window=BPoirier$rect) plot(BP.spp)