sentences:  This is a fairly recent development, as the deciduous trees that sprouted after the fires only started dying off in numbers in the 1980s.Before this time, the lake shore forest was dominated by deciduous trees.Therefore, for much of the 20th century, Spruce Island (which had escaped the fires) had a conspicuous evergreen forest in contrast to the younger deciduous forest of the surrounding shore, and thus the island received its name.