Fig. 5: Predicted assemblage dispersion field (ADF) symmetry diagrams based on predictive models.
From: Dispersion fields reveal the compositional structure of South American vertebrate assemblages
The arrows reveal the pattern of biotic similarity. a The predicted ADF diagram from a model where species originate in grid cells according to local energy availability and then spread spatially randomly from there; b the predicted ADF diagram from a model where species richness is constrained to be identical to the empirical and ranges are constrained to be spatially cohesive; c the predicted ADF diagram from a model where each species originate in its original vegetation ecoregion and spreads spatially randomly with the constraint that ecoregion boundaries are crossed with low probability. Vegetation ecoregions are defined by the map shown in Fig. 3d.
