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Aquatic Ecosystems

Aquatic Ecosystems. 4.5. Water depth – - Photic Zone – sunlight gets through; photosynthesis can occur here - Aphotic Zone – dark (no light); no photosynthesis. Freshwater Ecosystems. 3% of Earth’s surface water 3 categories: - Rivers and Streams - Lakes and Ponds

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Aquatic Ecosystems

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  1. Aquatic Ecosystems 4.5

  2. Water depth – - Photic Zone – sunlight gets through; photosynthesis can occur here - Aphotic Zone – dark (no light); no photosynthesis

  3. Freshwater Ecosystems • 3% of Earth’s surface water • 3 categories: - Rivers and Streams - Lakes and Ponds - Freshwater Wetlands (3 types) - freshwater bogs, marshes, and swamps

  4. Estuaries • = wetland where river meets the sea (fresh and salt water) • Support a large amount of biomass • Important area for spawning and nursery of many fish and shellfish

  5. Marine Ecosystems • = ocean • Divided into zones based on depth and distance from shore

  6. 3 zones - intertidal zone (in water at high tide, in air at low tide) - coastal ocean (low tide mark to outer edge of continental shelf) - open ocean (edge of continental shelf out) (90% of world’s ocean area)

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