(Figure 19.11) Given the results in the figure, what might prevent a tree with large seeds, like a chestnut, from establishing in a forest with high densities of sweet birch seeds, an early-succession species?

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The results in the figure show that sweet birch seeds germinate and grow faster than other tree species in the same area. This means that if a forest has high densities of sweet birch seeds, these seedlings will establish and grow faster than other tree species, including chestnut, which has large seeds. As a result, sweet birch seedlings will often crowd out other tree species, including chestnut saplings, making it difficult for the chestnut to establish in the area.