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Preventing Ecosystem Collapse: Alaska’s Kelp Forests

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Although these biological interactions control ecosystem shifts between kelp forests and urchin barrens, climate factors play a role, and in a most positive way. Otters are limited by ice. In places like Glacier Bay where ice has retreated, otter habitat is expanding. Likewise, kelp benefit from less sun-blocking ice while greater concentrations of carbon dioxide enhance photosynthesis and promote more growth. Life is good.

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