A 13,000-year history of vegetation and fire in a rare inland pine barrens: The Albany Pine Bush (Albany County, New York, USA)
Fig 5
Principal components analysis results for core STU.
Left: Plots of first and second PCA axes versus time. Right: The biplot for the first two principal components shows taxa (arrows) and samples assigned to four pollen zones with CONISS (shapes). Arrow: Zone 4 samples (circled) were positioned off the scale to the lower left (PC1 values -1.1 to -1.4; PC2 values ca. -1.6).