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' —Equilibrium (S)

Number of species

Macarthur Wilson
Number of species

Number of species

56.15 MacArthur and Wilson's Model of Species Richness on Islands (a) The rate of arrival of new species and the rate of extinction of species already present determine the equilibrium number of species on an island. (b) These rates are affected by the size of the island and its distance from the mainland.

as they did during the 1920s, but colonizations and extinctions continue, as predicted by the model.

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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