Page 32 - Science Course 3 (Book 1)

Mo1-L3b: What are the Types of Aquatic Ecosystems?

Animals in estuaries include many species that Overfishing threatens many ocean fish.
people use for food, like oysters and clams.
Trash discarded from ocean vessels or washed
Many species of birds depend on estuaries for into oceans from land is a source of pollution.
breeding, nesting, and feeding.

Destruction of estuaries reduces habitat for estuary
species and exposes coastline to flooding and storm
damage.

Microscopic algae and other producers in the sunlit
zone form the base of most ocean food chains.

Ocean : Open Oceans

The open sea, one type of ocean ecosystem, extends
from the steep edges of continental shelves to the
deepest parts of the ocean.

Photosynthesis can only take place in the
uppermost, sunlit zones(200 m).

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