Part of the theory is that herd animals pack down snow, freezing the soil much deeper. Other herd effects may also reduce greenhouse gas production.
"bison"
Ax-wielding musher from Whitehorse chases bison off Iditarod trail
Marcelle Fressineau said she and her dog team were caught off guard by three bison in the middle of the trail. She grabbed the only tool she had.
State schedules prescribed burns in Delta bison range to improve forage, habitat
Alaska Division of Forestry personnel will burn off dry vegetation in two areas around the Delta Junction State Bison Range over the next few weeks. The prescribed burns are intended to improve habitat for bison and other species that live on the range.
Wandering bison that ‘captured the hearts’ of Western Alaska poached near Quinhagak
She was a wanderer. Instead of sticking with her herd, Wood Bison 124 headed out on her own, traveling hundreds of solitary miles from the Alaska Yukon, down the Kuskokwim, to the sea. A bullet ended her journey Friday near Quinhagak. She was shot illegally.
The Bison Is Poised To Become The U.S. National Mammal
Legislation adopting the bison as the U.S. national mammal passed the House and Senate this week. Now it’s waiting for President Obama’s signature.