Why are there no spruces in the early seral stages of succession at Glacier Bay?
A) Spruce seeds are not likely to disperse to the pioneer and low-shrub stages.
B) Spruce seedlings are inhibited by the presence of low shrubs.
C) Spruce seedlings are not tolerant to the environmental fluctuations in the pioneer stage.
D) There are few alder trees in the early seral stages to facilitate spruce establishment.
Correct Answer:
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