The Arctic tundra shifted ... can interfere with caribou feeding, and warmer summer temperatures mean bigger plants grow that crowd out the lichen that caribou eat. Thoman said surface air ...

Reindeer are a species of deer also known as caribou ... eat up to twenty pounds of food each day! For many reindeer to survive in the wild, this lichen is necessary. Reindeer live in the Arctic ...

For caribou herds to persist, they must maintain access to productive calving grounds (areas that herds visit annually to give birth to their young). With respect to the Porcupine Caribou Herd (PCH) ...