Linking trait dimensions to processes
We consider our four trait dimensions to be indicative of different ecological processes: movement and interactions are indicative of the processes of the same name, whereas tolerance is analogous to the process of environmental filtering, and life history to demographic processes. Here, we seek to identify which dimensions most strongly influence each of the three rarity dimensions. Although in reality the three dimensions of rarity are, to some extent, likely influenced by all four processes for at least some species, our objective is to identify which of the processes are the key drivers of each rarity dimension (Figure 3).