Fig. B.1.
Principal component analysis using the seven parameters used for the clustering and MP analyses (Sect. 5.1). Top left: scree plot for the full sample showing the variance (eigenvalues) of the seven principal components (PCs). The curve represents the cumulative percentage of the total variance. The scree plots for the cluster and field sample are very similar. Top right: projection of the data on the plane of the first two PCs with arrows showing the loadings and direction of the parameters. The same diagram is plotted for the cluster (bottom left) and field (bottom right) samples.
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