Where are the Animals?

You notice that the few animals that are on the island stay close to shore. And toward the center of the island there is no life. You also realize that the island has no bird colonies.

Dr. Polis explains that the ocean is the food source for these island webs of life. Once you walk inland there is not enough food to sustain life. Also, the birds, which are so important to the food web, tend to nest on small islands where their major predators, such as snakes, are absent. These are truly ocean-powered islands.

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