Wolves reintroduced to Isle Royale temporarily affect other carnivores, humans have influence as well
From Phys.org:
In a rare opportunity to study carnivores before and after wolves were reintroduced to their ranges, researchers from the University of Wisconsin–Madison found that the effects of wolves on Isle Royale have been only temporary. And even in the least-visited national park, humans had a more significant impact on carnivores’ lives.
The paper, published recently in Frontiers in Ecology and the Environment, uses DNA from foxes and martens’ scat and hair to understand where these animals were and what they ate before wolves were reintroduced, following the first year of their reintroduction, and as they formed packs across the island.
