Possible methods of Norway spruce (Picea abies[L.] Karst.) stem shape description
M. Křepela, D. Zahradník, J. Sequenshttps://doi.org/10.17221/4560-JFSCitation:Křepela M., Zahradník D., Sequens J. (2005): Possible methods of Norway spruce (Picea abies[L.] Karst.) stem shape description. J. For. Sci., 51: 244-255.
The paper shows a possibility of using Bookstein coordinates for stem shape studies. Bookstein coordinates are simplified to stem shape diameters, for which tests of multidimensional normality, variance-covariance matrix homogeneity, equality of mean shape vectors and principal component calculation are carried out in sample plots Doubravčice 1 and Štíhlice. Principal components are also calculated for Procrustes tangent coordinates, presented in graphs, and the plots are compared. Doubravčice 1 and Štíhlice plots differ especially in age (70 and 30 years) while they do not differ in tree class representation.Keywords:
Norway spruce (Picea abies [L.] Karst.); stem shape; Bookstein coordinates; stem shape diameters; Procrustes tangent coordinates; principal components analysis