Figure 4
From: Resilience of marine invertebrate communities during the early Cenozoic hyperthermals
Changes in the composition of molluscan assemblages during the Upper Cretaceous-Eocene interval along the Gulf Coastal Plain. Non-metric multidimensional scaling (nMDS) ordination of molluscan assemblages based on (a) species, (b), genera, and (c) functional compositions. Samples with <50 specimens and individual stress values > 0.3 were excluded. Colours of data points correspond to the different epochs (as in Fig. 1); sample numbering (and symbols) corresponds to the time bins of Fig. S2. T-statistic from the PERMANOVA test using the Bray-Curtis dissimilarity of centroids for relative abundances and Kulczynski dissimilarity of centroids for presence/absence based on (d) species, (e) genera, and (f) functional compositions of sequential time bins: each point represents the dissimilarity between the time bin and the previous time bin. Insignificant p-values for the PERMANOVA t-statistic are indicated by dashed circles.
