The presence of grizzlies affects how long wolves will stay at the scene of their kills, new research has shown.
The research illuminated how top predators like wolves and bears don't ignore the presence of other apex hunters when around their kills but in fact are directly influenced by each other.
For example Yellowstone wolves tended to stay longer at the scene of carcasses when bears were around according to the study. In other words, the wolves seemed to defend their hard-won food by guarding it against the threat of poaching bears. The time wolves spent in between kills—the kill interval—also increased in Yellowstone during the summer months, the study said.
"Relatively little had been known about how bears affected the foraging dynamics of wolves," study author Matthew Metz from the University of Montana told the university's news website."Our work starts to fill in the gap by demonstrating that the dynamics do differ and provides another reminder of how changes in ecosystem complexity—in this case the presence of bears—affects the behavior of other species," he said.
The animals caused"trophic cascades" or domino effects in the ecosystems of the park since they were returned,. Their presence also helps bears directly by providing an easy meal at the scene of their kills.
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