La Conversation Canada invites you to take a virtual walk ... The nature of the forest-tundra depends on variability in the position of the Arctic front and on the fire history of the region ...

The nature of the forest-tundra depends on variability in the position ... As the ice sheet that covered nearly all of Canada melted away between 20,000-6,000 years ago, plants migrated north.

The nature of the forest-tundra depends on variability in the position of the ... As the ice sheet that covered nearly all of Canada melted away between 20,000-6,000 years ago, plants migrated north.

It is the interaction of fire, climate and time that determines the nature of the forest-tundra today and how it ... ice sheet that covered nearly all of Canada melted away between 20,000-6,000 ...