Killer whale predation on sea otters: how predation can cause major changes in an ecosystem

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Killer whale predation on sea otters how
predation can cause major changes in an ecosystem

• Special thanks to Dr. James Estes for the images
  and figures

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Location of the ecosystem Aleutian Islands,
Alaska
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Change in sea otter populations around the
Aleutian Islands
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WHY?
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Killer whale prey in the Aleutians
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Images from Estes et al. 1998
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Images from Estes et al. 1998
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Your turn!Make a hypothesis about what is going
to happen if the sea otters continue to decline
or even disappear.