Figure 4: The Sable Island horse faecal microbiome β-diversity
(Euclidean distance centred log-transformed counts) visualized in (A) a
PCA coloured by sandwort availability in 150-m radius buffers
surrounding the point of sample collection (absent, dark green: ●,
present, gold: ●) and (B) a scatterplot of Euclidean distance and the
longitudinal distance separating horses, points coloured depending on
whether 150-m spatial buffer contained sandwort for neither horse (dark
green: ●), only one horse (green: ●), or both horses (gold: ●). For ease
of plot visualization, a single point was omitted from panel ‘(B)’
corresponding to two horses of the same social band sampled at the same
location (longitudinal separation = 0, Euclidean distance = 69).