Animals in nationalparks are affected by even just a few people
and moose—over two summers. By controlling where and when people could access certain areas of Glacier Bay and then measuring wildlife responses to the differing levels of human activity, the researchers identified two important thresholds.
"It was eye-opening to see the number of wildlife sightings we are 'missing' just by recreating in backcountry areas of Glacier Bay," said lead author Mira Sytsma, who completed this work as a UW graduate student."I was surprised that for all four species, wildlife detections were always highest when there wasn't any human activity. So many people visit national parks for the chance to view wildlife, and that desire alone may reduce the chance of it happening.
A brown bear seen on a motion-activated camera in Glacier Bay National Park, Alaska. Credit: Mira Sytsma
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