In an intertidal area,when all starfish were | vedclass

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(C) This experiment was conducted by Robert Paine in the rocky intertidal communities of the American Pacific Coast.He removed all starfish $(Pisaster

Vedclass · Accepted Answer

Predation,$20$

Vedclass · Answer

(C) This experiment was conducted by Robert Paine in the rocky intertidal communities of the American Pacific Coast.He removed all starfish $(Pisaster)$ from an enclosed intertidal area.As a result,more than $20$ species of invertebrates became extinct within a year due to interspecific competition.This occurred because the starfish acted as a keystone predator,keeping the population of prey species in check.Therefore,$P$ is Predation and $Q$ is $20$.

In an intertidal area,when all starfish were removed,more than $Q$ species of invertebrates became extinct within a year due to $P$.

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