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Types of EcosystemsWater takes up more than 70% of the Earth’s
surface. That means that if you divided the Earth into ten equal parts, seven of those equal parts would be made of water.
The water on earth is categorized into two groups: freshwater ecosystems and saltwater ecosystems.
Saltwater is water that has a lot of salt in it.Freshwater is water that contains very little
salt.
Saltwater Ecosystems
Oceans, seas, and some lakes are examples of saltwater ecosystems.
The amount of salt in each one is not the same.
Plants and animals live in the shallow (not deep) parts because the suns shines more in these areas.
Ocean ZonesOceans are the world’s largest ecosystem. Water is deeper is some places than in
others and the water temperature also changes.
The ocean is divided into three zones. The zones are defined by how much sunlight they get.
The deeper the water, the colder and darker it becomes.
Plants and animals can be found in the areas closer to the surface.
Freshwater EcosystemsThese include rivers, streams, lakes, and
ponds.Rivers and streams have moving water. The
water may be moving fast or slow. Lake are usually larger and deeper than
ponds. Just like in the oceans, plants and animals
live in the shallow (less deep) parts. The sun shines more in the shallow parts.