ECOLOGY QUESTION: Following a volcanic eruption, an ecologist observes that spec

Question

ECOLOGY QUESTION:

Following a volcanic eruption, an ecologist observes that species composition is dominated by species A for 10 years, but after that point species B is more common. Concurrently, the ecologist carries out an experiment in which species A is removed from some plots. Which results and conclusion are logical?

Select ALL that are logical conclusions for the given results.

Explanation / Answer

If species B becomes common in the removal plots after 5 years, then facilitation succession is occurring at the site - Since the species A - the primary successor has already become uncommon, facilitation succession is occuring that is facilitating the succession of later-successional species B. The conditions created by the species A in the removal plots have helped species B to flourish. If species B becomes common in removal plots after 15 years, then inhibition succession is occurring - When the specis A is removed, species B becomes the primary successional species that is inhibiting the growth of later successional species and species A that was already present.

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