Scale-dependent habitat selection is shaped by landscape context in dispersing white-tailed deer

Abstract

ContextIdentifying how animals select habitat while navigating landscapes is important for understanding behavioral ecology and guiding management and conservation decisions. However, habitat selection may be spatially and temporally plastic, making it challenging to quantify how species use resources across space and time.ObjectivesWe investigated how landscape context and dispersal shape habitat selection at multiple spatial scales in white-tailed deer (Odocoileus virginianus).MethodsUsing step-selection functions, we quantified habitat selection of landcover and topographic covariates at three spatial scales for juvenile males during three movement periods (before, during, after dispersal) in two regions of Missouri, USA—a fragmented, low forest cover region with rolling hills, and a forested, topographically variable region.ResultsAlthough selection for forest cover increased after dispersal in both regions, deer selected forest cover at smaller spatial scales in the fragmented, low forest cover region. This result indicates scale of selection was dependent on forest availability and configuration with deer likely perceiving landscapes differently across their distribution. Functional responses to topography differed in magnitude and direction between regions with deer avoiding roads and selecting valleys in the rolling hills region (especially during dispersal) while showing no response to roads and selecting for ridgelines (during dispersal) in the topographically variable region. This result suggests movement behavior is strongly dependent on topography.ConclusionsAlthough deer may select similar habitats among regions, landscape context and movement period shape the scale, strength, and direction of selection. This result has important implications for how animals use landscapes across different regional contexts.