The results of a recent paper on the modeling of a honey bee colony have been supplemented and strengthened by showing that the domain of biological validity of a mathematical model with unstable singularity removed is contained in the domain of attraction of positive stable equilibrium.

We evaluated shifts in plant–pollinator communities between two years with different precipitation patterns on a mountain gradient in Arizona. We found that plant richness decreased, pollinator generalization increased at the highest life zone, and plant and pollinator activity was less consistent in the dry year. As drought is expected to increase worldwide, understanding local-scale plant–pollinator interactions may highlight which species will be critical in times of lower precipitation.