What if There Were No Sea Otters?: A Book About the Ocean Ecosystem by Suzanne Slade

Slade, Suzanne. What if There Were No Sea Otters?: A Book About the Ocean Ecosystem. North Mankato: Picture Window Books, 2011. 24p.  

This book, perfect for science units, introduces sea otters as a keystone species and explains their role within the ocean ecosystem. Tips on the final page help students discover ways in which they can help protect our oceans. For information on additional ecosystems, read the rest of the series!