224 Aquatic Ecosystems

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22-4 Aquatic Ecosystems
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Ocean Zones

• Photic Zone receives sunlight
• Aphotic Zone does not receive sunlight
• Intertidal Zone shorelines
• Neritic Zone over continental shelf
• Oceanic Zone deep area beyond continental shelf
• pelagic zone open ocean
• benthic zone bottom of the ocean
• Estuary where freshwater rivers flow into the
  sea

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Freshwater Zones

• Lentic do not flow into a larger body (ponds,
  lakes)
• Eutrophic rich in organic matter murky water
• Oligotrophic little organic matter clear water
• Lotic do flow into a larger body (streams,
  rivers)

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