5th+Period+Unit+4+Jacques+and+Grace

Freshwater:

 * Freshwater communities include lakes,ponds,rivers,and streams.
 * Ponds and lakes are similar. Both move extremley slow, and have algae on the top. These algae serve as producers.
 * Most rivers begin streams in moutains or hills.
 * Plants and animals must be able to live with the currents.
 * 3% of the world is freshwater.
 * Where the water slows down beavers and otters can be found.

Estuaries:

 * Part of a river where fresh water mixes with salt water from the ocean.
 * Estuaries usaully have a great diversity of plants and animals.
 * Many marine organisms hatch and spend their early lives in estuaries.

Marine:
 * A marine ecosystem can be described in terms of four general zones: intertidal zone,neritic zone, oceanic zone, and benthic zone.
 * Intertidal zone- a region between the highest tide line and the lowest tide line.
 * Neritic zone-is located above the centinental shelf andis the most productive zone in the ocean.
 * Oceanic zone-open ocean.
 * Benthic zone-The ocean floor.


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