Extended Data Fig. 8: The dimensionality of avian trophic and foraging niches.
From: Macroevolutionary convergence connects morphological form to ecological function in birds
a-b, The identity of the trait dimensions best describing (a) trophic and (b) foraging niches for different levels of dimensionality. c-d, estimates of dimensionality (D) according to Levene’s index for (c) trophic niches and (d) foraging niches. Each niche is given separately, and with all niches combined (‘All’), along with the identity of the principal component (PC) dimensions (coloured squares) that best predict the niche.
