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Keystone Predators Research Paper

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Keystone predators is defined as one of the organism in a community that defines the structure of the community by the abundance and diversity of species (Menge et al. 1994). Paine stated that a keystone predator will have two skills which are the predator will control the prey population by consumption and the prey species of the predator could competitively outcompete other prey species in the community ( Menge et al. 1994). Paine suggested that the local marine diversity is correlated to the predators in that ecosystem (Paine 1996).
The sea star Pisaster ochraceus is a keystone predator in the rocky intertidal. The P. ochraceus is commonly found the west coast of North America (Ricketts and Calvin 1962; Menge 1972). The sea star diet consist

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