The distribution of bees can be estimated, in part, by enviromental variables associated with geography. Using bee occurrence records, we quantified the estimated species richness of the EPA level 3 defined ecoregions using coverage-based rarefaction. Our study reveals that bee species richness is highest in ecoregions with warm dry summers. Furthermore, increased species richness was found to be correlated with maximum mean temperature.

Presented at the iDigBio 6th Annual Digital Data in Biodiversity Research Conference on 05/24/2022 and the University of California Santa Barbara EEMB Undergraduate Research Symposium on 04/23/2022