Nowhere to hide: Effects of linear features on predator-prey dynamics in a large mammal system

The Journal of Animal Ecology
Craig A DeMars, S Boutin

Abstract

Rapid landscape alteration associated with human activity is currently challenging the evolved dynamical stability of many predator-prey systems by forcing species to behaviourally respond to novel environmental stimuli. In many forested systems, linear features (LFs) such as roads, pipelines and resource exploration lines (i.e. seismic lines) are a ubiquitous form of landscape alteration that have been implicated in altering predator-prey dynamics. One hypothesized effect is that LFs facilitate predator movement into and within prey refugia, thereby increasing predator-prey spatial overlap. We evaluated this hypothesis in a large mammal system, focusing on the interactions between boreal woodland caribou (Rangifer tarandus caribou) and their two main predators, wolves (Canis lupus) and black bears (Ursus americanus), during the calving season of caribou. In this system, LFs extend into and occur within peatlands (i.e. bogs and nutrient-poor fens), a habitat type highly used by caribou due to its refugia effects. Using resource selection analyses, we found that LFs increased predator selection of peatlands. Female caribou appeared to respond by avoiding LFs and areas with high LF density. However, in our study area, most caribo...Continue Reading

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Citations

Oct 12, 2018·Conservation Biology : the Journal of the Society for Conservation Biology·Joanna M BurgarJason T Fisher
Mar 6, 2019·The Journal of Animal Ecology·Jonah L KeimNoemie S Jenni
Jun 4, 2019·Ecology·Justine A SmithArthur D Middleton
Apr 23, 2019·Wildlife Society Bulletin·Daniel R EackerDave Hervieux
Oct 19, 2019·Ecology and Evolution·Tyler B MuhlyMarco Musiani
Feb 23, 2020·Ecology and Evolution·Erin R TattersallA Cole Burton
May 27, 2020·Journal of Mammalogy·Kristin DenryterMichael P Gillingham
Feb 17, 2019·Journal of Environmental Management·Kyle A CuttingBok F Sowell
May 26, 2021·Proceedings of the National Academy of Sciences of the United States of America·Jennifer L RaynorDominic P Parker
May 18, 2021·Trends in Ecology & Evolution·Megan C SabalEric P Palkovacs

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