Sea otters are a keystone species in their environment. If they were to disappear, the ripple effect on the plants and animals in the ecosystem would be profound. Kelp forests absorb carbon dioxide. Sea urchins feed on kelp and can deplete these forests if they are not kept in check. Sea otters prey on sea urchins, helping to maintain healthy kelp forests and thus, a healthy ecosystem.

What would the world be like without elephants? In recent years, the dwindling population of this endangered species has made it necessary to confront this question. Habitat destruction and poaching have jeopardized the survival of this keystone species, leading to widespread consequences. In this informative text, readers learn about the important role that elephants play in their ecosystem, the dangers they face, and what can be done to protect...

"Many young readers may not even realize corals are animals. However, these amazing ocean dwellers are some of the most important animals in the sea! With this engaging volume, readers will learn all about these essential organisms and some of the reasons our planet needs them. Colorful photographs showcase the natural beauty of these colorful creatures, while accessible text helps to reinforce key lessons from the elementary science curriculum. Informative...