Spruce trees are medium to late successional species.
Spruce trees are medium successional species that occur after the event of glacial retreat. Spruce is a species that would appear between 0 and 40 years according to this graph. The Spruce specie appears after 20 years which can be seen on the graph.
Spruce specie is considered a medium to late successional species, but it occurs in all stages of boreal forest succession. White spruce is present in those areas that burn infrequently so we can conclude that Spruce trees are medium to late successional species.
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