RT Journal Article SR Electronic T1 Mammals adjust diel activity across gradients of urbanization JF bioRxiv FD Cold Spring Harbor Laboratory SP 2021.09.24.461702 DO 10.1101/2021.09.24.461702 A1 Travis Gallo A1 Mason Fidino A1 Brian Gerber A1 Adam A. Ahlers A1 Julia L. Angstmann A1 Max Amaya A1 Amy L. Concilio A1 David Drake A1 Danielle Gray A1 Elizabeth W. Lehrer A1 Maureen H. Murray A1 Travis J. Ryan A1 Colleen Cassady St. Clair A1 Carmen M. Salsbury A1 Heather A. Sander A1 Theodore Stankowich A1 Jacque Williamson A1 J. Amy Belaire A1 Kelly Simon A1 Seth B. Magle YR 2021 UL http://biorxiv.org/content/early/2021/09/24/2021.09.24.461702.abstract AB Time is a fundamental component of ecological processes. How animal behavior changes over time has been explored through well-known ecological theories like niche partitioning and predator-prey dynamics. Yet, changes in animal behavior within the shorter 24-hour light-dark cycle have largely gone unstudied. Understanding if an animal can adjust their temporal activity to mitigate or adapt to environmental change has become a recent topic of discussion and is important for effective wildlife management and conservation. While spatial habitat is a fundamental consideration in wildlife management and conservation, temporal habitat is often ignored. We formulated a temporal resource selection model to quantify the diel behavior of eight mammal species across ten U.S. cities. We found high variability in diel activity patterns within and among species and species-specific correlations between diel activity and human population density, impervious land cover, available greenspace, vegetation cover, and mean daily temperature. We also found that some species may modulate temporal behaviors to manage both natural and anthropogenic risks. Our results highlight the complexity with which temporal activity patterns interact with local environmental characteristics, and suggest that urban mammals may use time along the 24-hour cycle to reduce risk, adapt, and therefore persist in human-dominated ecosystems.Competing Interest StatementThe authors have declared no competing interest.