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Spatial pattern of oaks suffering from frost shake in Allogny, France.
Description
Spatial pattern of sound and split oaks (Quercus petraea) suffering from frost shake in a 2.35-ha plot in Allogny, France.
Usage
data(Allogny)Format
A list with 4 components:
$rect is a vector of coordinates (xmin,ymin,xmax,ymax) of the origin and the opposite corner of a 125 by 188 m square plot.
$trees is a list of tree coordinates (x,y).
$status is a factor with 2 levels ("splited","sound").
Source
Grandjean, G., Jabiol, B., Bruchiamacchie, M. and Roustan, F. 1990. Recherche de correlations entre les parametres edaphiques, et plus specialement texture, hydromorphie et drainage interne, et la reponse individuelle des chenes sessiles et pedoncules ? la gelivure. Rapport de recherche ENITEF, Nogent sur Vernisson, France.
References
Goreaud, F. & Pelissier, R. 2003. Avoiding misinterpretation of biotic interactions with the intertype K12-function: population independence vs. random labelling hypotheses. Journal of Vegetation Science, 14: 681-692.
Examples
data(Allogny)
allo.spp <- spp(Allogny$trees, mark=Allogny$status, window=Allogny$rect)
plot(allo.spp)