The long dark maple sapling2/17/2023 ![]() ![]() We could identify no plausible species-specific canopy influences or consistent responses of understory individuals that couldd be the basis for autogenic succession or autogenic coexistence. In the forest as a whole, from 1933 to 1980, sugar maple remained dominant in small understory size classes, and beech remained dominant in larger understorey size classes and in the canopy. ![]() We could discern neither successional change toward increasing dominance by sugar maple or beec nor beech self-replacement by root sprouts. Our goal was to distinguish among four hypotheses: autogenic succession, allogenic succession, autogenic coexistence, and allogenic coexistence. Factors responsible for patterns of canopy tree replacement were studied for 22 yr in Warren Woods, Michigan, USA, and old-growth forest codominated by American beech (Fagus grandifolia) and sugar maple (Acer saccharum). ![]()
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