DIGITALNA ARHIVA ŠUMARSKOG LISTA
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analysed using the Monmonier’s maximum difference algorithm, implemented in Barrier 2.2 software (Manni et al. 2004). A canonical discriminant analysis was performed to calculate the discriminatory power of characters among biogeographical regions. The proportion of correctly classified individuals into biogeographical regions was determined using classificatory discriminant analyses (Oksanen et al. 2017). To examine the level of environmental and phenotypic divergence between the studied biogeographical regions, principal component analysis (PCA) was used. The input data in multivariate statistical methods were previously standardized, i.e. standardization of characters to zero mean and unit standard deviation was performed prior to each multivariate analysis.
The above statistical analyses were conducted using the STATISTICA 8.0 statistical program (StatSoft, Inc. 2001), and “MorphoTools” R scripts in R v.3.2.2 (R Core Team, 2016) following the manual of Koutecký (2015).
Results
Rezultati
The results of the conducted descriptive statistical analysis are shown by biogeographical region (Figure 3). The highest mean values for all analysed characteristics were observed in the populations from the continental region. Coefficients of variation among populations for particular morphological traits were generally similar (data not shown). However,