Identification of soil faecal fingerprints from the archaeological site of I͡Arte VI by multivariate analyses on eleven 5β-stanol distributions.

(A) PCA score plot of 5β-stanol distributions from the reference library of faeces of dogs, lemmings, humans and reindeer, together with the 5β-stanol distributions in the soil samples. PC1 and PC2 represent respectively principal components 1 and 2. The numbers in brackets show the variance explained by each PC. (B) PCA correlation circle. (C) HCPC dendrogram of dog (D), lemming (L), human (Hu), reindeer (R) and soil sample (Iamal) fingerprints. The main variables/compounds responsible for the distinction between the main clusters are hierarchized (from the more important + to the less import -) according to S6 Table. More details of the PCA/HCPC models can be found in S6 Table and sample information is in S2 Table.