Is carbon dioxide killing Minnesota moose?

A typical alarmist story from Minnesota Public Radio is here.

Key excerpt:

Moose cows appear to be giving birth at a normal rate, but a growing number of those spring calves don't survive their first year.

It sounds like researchers have no hard data on why the calves aren't reaching their first birthday. Blaming this on human carbon dioxide emissions sounds, at best, like a politically correct guess.

Why does this article fail to even mention wolf predation?

According to the Fish and Wildlife Service, the number of Minnesota wolves grew by a factor of three (or even six) from 1973 to 2004. Doesn't it seem intuitive that a wolf population over 3,000 could have a significant impact on calf survival on a moose population of under 8,000?

Do wolves eat moose calves?

From a study in Norway:

Of the main prey taken (moose, roe deer, and beaver), moose calves contributed 61% of the biomass ingested by wolves in summer.

From another Scandinavian study:

Moose (Alces alces) was the dominant prey species both by number (74.4%) and biomass (95.6%); 89.9% of all moose killed were juveniles, representing 76.0% of the biomass consumed by wolves. Kill rate in terms of the kilogram biomass/kilogram wolf per day averaged 0.20 (range: 0.07-0.32) among wolf territories and was above, or well above, the daily minimum food requirements in most territories. The average number of days between moose kills across wolf territories and study periods was 1.71 days, but increased with time and size of growing moose calves during summer. Over the entire summer (June-September, 122 days), a group (from two to nine) of wolves killed a total of 66 (confidence interval 95%; 56-81) moose.