Wolves and moose on Isle Royale, before and after global warming

Before (1996):

"The Isle Royale moose population, meantime, has plunged to an estimated 1,200 animals, half the previous year's count. It was a matter of time until something broke, and it broke in a big way, Dr. Peterson said. Everything turned against the moose at once. It was the severest winter I've seen on the island. The temperature fell to 43 degrees below zero, the coldest on record. Three feet of snow aggravated a extreme shortage of winter browse, and the moose also suffered from a heavy winter tick infestation that caused substantial hair loss and left them in a weakened state."

After (2007):

"In 2002, the island was home to more than a thousand moose. Since then, unusually warm summers have dealt a double whammy to the big herbivores: They lose their appetites and seek shelter from the heat, putting them in a worse position to survive winter. And the climate change also seems to favor ticks, causing a massive infestation that has yet to abate. Fortunately for human visitors to the island, the ticks have no interest in people."