Figure 3.

Assessing the roles of resource availability versus resource heterogeneity on parasite diversity at the (A) host, (B) population and (C) community scales. Depicted are the coefficient estimates ± 95% of host availability and host richness when included together in regression models. Host availability was defined as host body size (snout–vent length) at the individual scale, as the log₁₀-transformed abundance of hosts of a given species at the population level, and the log₁₀-transformed total abundance of all host species at the community level. While host richness was a positive predictor of parasite richness across all three scales, host availability was a co-contributor only at the community scale.