Climate change, not habitat loss, may be biggest threat to caribou herds: study

Research suggests climate change, not habitat loss, may be the biggest threat to the survival of threatened caribou herds. A caribou moves through the Algar region of northeastern Alberta in September 2017 in a handout photo.

For years, biologists have pointed to sustained industry-caused damage to the old-growth forests preferred by caribou as the reason the species is now threatened.Many argue that the cutlines and clearcuts left behind are pathways for deer, which lure along packs of wolves that end up preying on caribou as well.

“Climate is spreading the envelope of where deer can establish themselves,” said Dickie, senior caribou ecologist for the Alberta Biodiversity Monitoring Institute.In the late 1990s, whitetails were scarce in the northern boreal forest, Dickie said. By the turn of the century, they were abundant.In order to establish whether that envelope was spread by climate or by habitat, the authors looked to a region of northeastern Alberta and northwestern Saskatchewan.

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