Body size trends in response to climate and urbanization in the widespread North American deer mouse, Peromyscus maniculatus.

ABSTRACT: Body size decline is hypothesized to be a key response to climate warming, including warming driven by urban heat islands. However, urbanization may also generate selective gradients for body size increases in smaller endotherms via habitat fragmentation. Here we utilize a densely sampled, multi-source dataset to examine how climate and urbanization affect body size of Peromyscus maniculatus (PEMA), an abundant rodent found across North America. We predicted PEMA would conform to Bergmann's Rule, e.g. larger individuals in colder climates, spatially and temporally. Hypotheses regarding body size in relation to urbanization are less clear; however, with increased food resources due to greater anthropogenic activity, we expected an increase in PEMA size. Spatial mixed-models showed that PEMA

SUBMITTER: Guralnick R 

PROVIDER: S-EPMC7264193 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature