START A PETITION 25,136,189 members: the world's largest community for good
START A PETITION
x

Climate Change Means Doom for Snowshoe Hares

Climate Change Means Doom for Snowshoe Hares

Animals whose fur changes color with the seasons, the better to camouflage them in warmer months vs. snowy ones, are in serious danger as the world warms up. Climate change is affecting not only how much snow falls, but also how long it sticks around — and animals such as snowshoe hares who change from brown to white in winter do so based on the calendar, not the climate and temperature.

Researchers at the University of Montana studied 148 hares over the course of three years and looked at how white they were in comparison to their environment. What they found was that, while the amount of snowfall affects when hares change their color in the spring, it does not in the fall.

In the fall, the researchers found that the brown to white color change took 40 days. The hares changing the color of their coats at such fixed times is a “not surprising” phenomenon, as their fall molting is linked to their daily exposure to light. That is, it’s not the appearance of snow that causes snowshoe hares to molt; their coat change is a response to shortening days.

In contrast, the rate at which the hares’s fur changes was found to vary in the spring. At the researchers’ western Montana study site, the winters of 2010 and 2011 were the least snowiest. 2011 had the longest snow season and, in that year, the hares took 16 days longer to go back from being white to brown than they had in 2010.

The researchers also found that female hares also changed their fur color at a faster rate than makes, doing so 11 days earlier — a sign of the females having some capacity for adapting to change a bit more quickly?

If snowshoe hares can change the rate at which they molt, it would be to their advantage. As the University of Montana researchers point out, because snowpack in the region is predicted to last for a month less by midcentury, and by two months by the end of the century, the snowshoe hare’s survival is in question. There will simply be more days (four to eight times as many) that white hares “will be mismatched on a snowless background” as a result of a “novel and visually compelling climate change-induced stressor,” the scientists write.

Currently, 85 to 100 percent of snowshoe hares’ deaths occur due to predators. Their camouflaging coats play a big role in hiding them from, to name one predator, the endangered Canadian lynx. While climate change could mean the lynxes (who also live in the U.S.) have plenty to eat for the short run, their long-term feeding habits could well be compromised, notes Mother Jones.

At least nine other animals undergo seasonal color changes: arctic foxes, collared lemmings, long-tailed weasels, stoats, mountain hares, arctic hares and white-tailed jackrabbits. They, too, could find their survival compromised as their centuries-old strategy of changing their fur from dark to white and back again fails in a climate changed world.

 

Related Care2 Coverage

Greenland Becomes A Greenhouse. Literally.

The North Pole Could Be Open to Shipping Very, Very Soon

Will We Have to Start Feeding, or Killing, Polar Bears?

Read more: , , , , , , , , ,

Photo from Thinkstock

have you shared this story yet?

some of the best people we know are doing it

102 comments

+ add your own
3:30AM PDT on Apr 6, 2014

Thank you

5:56AM PDT on Jun 11, 2013

thanks for sharing

12:34PM PDT on May 26, 2013

I saw my first live white furred snowshoe hare about 15 years ago. It was a Winter with no snow and the poor hare was running for its life!

11:50AM PDT on May 1, 2013

PAUL B and like thinkers: In my humble opinion, it is not just the "snowshoe hare (way down on Arctic the food chain by the way) but the "polar bears" (way, way up on the Arctic food chain) and penguins as well, to say nothing of the "human race" that we are losing to "climate change" (global warming) and evolution is not going to help us - or them for that matter - in any way, shape, form or manner. And, there is MUCH that we can do - if it isn't already too late - to impact global warming. Don :-((

8:14AM PDT on May 1, 2013

Evolution takes care of these problems. The faster changing hares are the ones who survive better and breed other faster changing hares. That is how it has worked for millenia of evolutionary life on this planet.

Global warming, global cooling, as it has occurred through the existence of our planet is a cylcle that all life has had to deal with. There is little if anything we can do to impact that.

Species have come and gone over the millions of years prior to human life, so to think that this is anything but natural is to think we are greater than we are.

Sure it is sad when species disappear, especially at the hands of humans, like whales, tigers, buffalo, as we have hunted them and profited from them over the centuries. But to say that we are potentially losing a species due to climate change is not one we can do anything about, and becomes a matter of acceptance of our existence.

It is nature, it is natural, and will always be a factor in our existence, as long as evolution of both animals and our planet continues.

6:36AM PDT on Apr 30, 2013

Very sad news. Poor innocent creatures.

1:58AM PDT on Apr 29, 2013

We are losing their loved ones on the planet. It is very sad.

5:07AM PDT on Apr 28, 2013

When can human impact on the environment stop?

8:44PM PDT on Apr 27, 2013

How could we do this to them? :(

11:53AM PDT on Apr 26, 2013

What species haven't we doomed????? Humans are dooming every single species on this planet.....including ourselves. We should all be scared $h!tle$$.......

add your comment



Disclaimer: The views expressed above are solely those of the author and may not reflect those of
Care2, Inc., its employees or advertisers.

ads keep care2 free

Recent Comments from Causes

Oil. Always that black gold - so important if you are guided by greed. Our highest calling is to protect…

Do loins take care of or adopt orphaned baby loins? From the little that I do know about loin beahvoir…

meet our writers

Kristina Chew Kristina Chew teaches and writes about ancient Greek and Latin and is Online Advocacy and Marketing... more
Story idea? Want to blog? Contact the editors!
ads keep care2 free



Select names from your address book   |   Help
   

We hate spam. We do not sell or share the email addresses you provide.