Figure 4
From: The fast-acting “pulse” of Heinrich Stadial 3 in a mid-latitude boreal ecosystem
(a) PCA ordination of terrestrial pollen taxa (> 2%) and sites showing changes in the pollen image for terrestrial ecosystems structure. Axis 1 represents a forest cover gradient. (b) PCA ordination of sites. Pie-charts show the relative abundances of different vegetation types at GS and GI intervals. Data standardization and ordination were carried out with the Vegan package79 in R environment80.
