The Keystone Predator Hypothesis

Under the keystone predator hypothesis, a predator severely limits the abundance of a competitively dominant prey species, allowing competitively subordinate species coexist in part of the habitat, maintaining the species richness, and the spatial patterns comprising the community. Now widely applied to both aquatic and terrestrial habitats, the hypothesis was based on the experimental findings of the Mytilus—Pisaster system. The removal of predacious sea star Pisaster precipitated the downward expansion of the mussel bed, which overgrew, shaded, and crushed the algae and sedentary invertebrates occupying the lower level. This result was the first operational definition of a keystone predator.

10 Ways To Fight Off Cancer

10 Ways To Fight Off Cancer

Learning About 10 Ways Fight Off Cancer Can Have Amazing Benefits For Your Life The Best Tips On How To Keep This Killer At Bay Discovering that you or a loved one has cancer can be utterly terrifying. All the same, once you comprehend the causes of cancer and learn how to reverse those causes, you or your loved one may have more than a fighting chance of beating out cancer.

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