Density-dependent habitat selection alters drivers of population distribution in northern Yellowstone elk.

ABSTRACT: Although it is well established that density dependence drives changes in organismal abundance over time, relatively little is known about how density dependence affects variation in abundance over space. We tested the hypothesis that spatial trade-offs between food and safety can change the drivers of population distribution, caused by opposing patterns of density-dependent habitat selection (DDHS) that are predicted by the multidimensional ideal free distribution. We addressed this using winter aerial survey data of northern Yellowstone elk (Cervus canadensis) spanning four decades. Supporting our hypothesis, we found positive DDHS for food (herbaceous biomass) and negative DDHS for safety (openness and roughness), such that the primary driver of habitat selection switched from food to s

SUBMITTER: Smith BJ 

PROVIDER: S-EPMC10107875 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature