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Ch. 6 - Biomes Section 6.1: Defining Biomes Biome: a group of ...

Ch. 6 - Biomes Section 6.1: Defining Biomes Biome: a group of ...

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Depth- photosynthesis by aquatic plants and phytoplankton is mostly limited<br />

by available light<br />

Aquatic Layers<br />

-Photic Zone- uppermost layer <strong>of</strong> an aquatic ecosystyem, where there<br />

is enough light for photosynthesis<br />

-Aphotic Zone- no sunlight penetrates and photosynthesis cannot occur<br />

-Benthic Zone- very bottom <strong>of</strong> a body <strong>of</strong> water, depending on the depth<br />

and clarity <strong>of</strong> the water, benthic zones can be sunlit or pitch dark<br />

9

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