Fig. 1: Landscape forest gradient classes of the North American boreal.
From: A shift in transitional forests of the North American boreal will persist through 2100

Forest gradient classes shown for landscapes derived from level 8 hydrobasins intersecting the study domain (n = 16,559). These landscapes combine those associated with the taiga-tundra transition zone (TTE)22, with those of the boreal forest and a small set associated with adjacent tundra.