Coexistence or conflict: Black bear habitat use along an urban-wildland gradient

PLoS One. 2022 Nov 29;17(11):e0276448. doi: 10.1371/journal.pone.0276448. eCollection 2022.

Abstract

The urban-wildland interface is expanding and increasing the risk of human-wildlife conflict. Some wildlife species adapt to or avoid living near people, while others select for anthropogenic resources and are thus more prone to conflict. To promote human-wildlife coexistence, wildlife and land managers need to understand how conflict relates to habitat and resource use in the urban-wildland interface. We investigated black bear (Ursus americanus) habitat use across a gradient of human disturbance in a North American hotspot of human-black bear conflict. We used camera traps to monitor bear activity from July 2018 to July 2019, and compared bear habitat use to environmental and anthropogenic variables and spatiotemporal probabilities of conflict. Bears predominantly used areas of high vegetation productivity and increased their nocturnality near people. Still, bears used more high-conflict areas in summer and autumn, specifically rural lands with ripe crops. Our results suggest that bears are generally modifying their behaviours in the urban-wildland interface through spatial and temporal avoidance of humans, which may facilitate coexistence. However, conflict still occurs, especially in autumn when hyperphagia and peak crop availability attract bears to abundant rural food resources. To improve conflict mitigation practices, we recommend targeting seasonal rural attractants with pre-emptive fruit picking, bear-proof compost containment, and other forms of behavioural deterrence. By combining camera-trap monitoring of a large carnivore along an anthropogenic gradient with conflict mapping, we provide a framework for evidence-based improvements in human-wildlife coexistence.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Animals, Wild
  • Anthropogenic Effects
  • Crops, Agricultural
  • Ecosystem*
  • Humans
  • Seasons
  • Ursidae*

Associated data

  • Dryad/10.5061/dryad.nvx0k6dvf

Grants and funding

Funding was received from a National Geographic Early Career Grant (EC-336R-18; https://www.nationalgeographic.org/society/grants-and-investments/) awarded to JKvB, the University of British Columbia’s Faculty of Forestry (no grant number; https://forestry.ubc.ca/), and the Natural Sciences and Engineering Research Council of Canada (NSERC; https://www.nserc-crsng.gc.ca/index_eng.asp), through a Canada Graduate Scholarship to JKvB (no grant number) and NSERC Discovery Grant (DGECR-2018-00413) to ACB. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.