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# Recreation noise can displace mammals for weeks after the sound stops
- URL: https://intelligence.wildlandseco.com/2026-10-01-recreation-noise-mammal-recovery/
- Published: 2026-10-01T13:53:42.000Z
- Updated: 2026-10-01T13:53:42.000Z
- Description: A field playback experiment in Wyoming found recovery time depended on recreation type, exposure rate and species; high-rate motorized noise suppressed detections of most species beyond a 15-week season.
- Author: Benjamin Worlund
- Tags: recreation ecology, mammals, disturbance recovery, Wildlife, Land, Recreation, Management, #ecological-intelligence, #brief-2026-10-01, #land-manager-watch, #peer-reviewed, #geo-north-america

Evidence

Peer-reviewed

Geography

Bridger-Teton National Forest, Wyoming, USA

System

Public-land mammal habitat and recreation

## WHAT THE EVIDENCE SAYS

At 12 sites over two field seasons, researchers broadcast motorized and non-motorized recreation sounds at high- and low-use rates and compared weekly mammal detections with nature-sound controls. Under high-rate motorized playback, every analyzed species except mule deer remained below baseline through the 15-week season; mule deer returned by week six. High-rate non-motorized effects persisted to about seven weeks for other species, while low-rate non-motorized treatments produced seven- to nine-week recovery times.

## WHY IT MATTERS / OUR READ

For managers, temporal pattern is part of recreation intensity. A trail can be quiet today and still sit inside a wildlife-response window created by repeated prior use. Where sensitive species and high-use routes overlap, spatial refugia, seasonal limits or use-rate management may matter more than a simple open/closed designation.

## CAVEATS / UNCERTAINTY

The experiment isolated acoustic disturbance rather than the full package of people, vehicles, scent and physical trail use. Camera detections measure use or avoidance, not demographic harm, and the 12-site Wyoming experiment should not be converted into universal recovery periods for other species or landscapes.

## SOURCE

Biological Conservation / USFS — primary study  
[View original evidence ↗](https://doi.org/10.1016/j.biocon.2026.112084?ref=intelligence.wildlandseco.com)

From the Morning Brief · 2026-10-01

[Read the full Morning Brief →](https://intelligence.wildlandseco.com/morning-brief-2026-10-01/)