Which one of the following statements about the trophic cascade in the sea otter and sea urchin-kelp communities along the West Coast of North America are true? Check all that apply.
_____ Increased sea otter populations are linked to more profuse growth of the kelp forests.
_____ Increased orca (killer whale) predation on sea otters is linked to more profuse growth of the kelp forests.
_____ Increased sea otter populations are linked to increased sea urchin populations.
_____ Increased orca (killer whale) predation on sea otters is linked to increased sea urchin populations.
_____ Increased sea urchin populations are linked to less profuse growth of the kelp forests.
__X__ Increased sea otter populations are linked to more profuse growth of the kelp forests.
_____ Increased orca (killer whale) predation on sea otters is linked to more profuse growth of the kelp forests.
_____ Increased sea otter populations are linked to increased sea urchin populations.
__X__ Increased orca (killer whale) predation on sea otters is linked to increased sea urchin populations.
__X__ Increased sea urchin populations are linked to less profuse growth of the kelp forests.
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