A California sea otter wakes up from a nap and unwraps itself
from the large frond of kelp that was keeping it from floating
away while sleeping. The playful sea otter dives to the ocean
floor, looking for tasty sea urchins that are feeding on the
kelp. After bringing a sea urchin to the surface, the sea otter
floats on its back in the sunshine, opens the urchin by
banging on it with a rock, and eats it. The ocean water, kelp,
sea urchins, sea otter, sunshine— indeed, all of the living and
nonliving things that interact in this coastal marine area—
make up an ecosystem. What types of ecosystems are found
where you live?
الرئيسية 
