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http://queticosuperior.org/blog/scientists-northern-minnesotas-rising-deer-population-blame-dwindling-moose-numbers

Scientists: Northern Minnesota’s rising deer population to blame for dwindling moose numbers
Posted on November 9, 2017 by Greg Seitz

As moose have slowly disappeared from northeastern Minnesota in the past decade, researchers have been undertaking exhausting studies to understand why.

Now, they have a pretty good idea. One quarter to a third of the dead moose they were able to examine died due to brain parasites carried by whitetail deer.

In a report in the Star Tribune, Department of Natural Resources managers explained that deer can carry the parasites without suffering any ill effects. But they can kill or seriously weaken moose.

MORE AT LINK, including link to an article explaining how the deer are also destroying populations of native trees.