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Ch. 6 Aquatic Biodiversity

Ch. 6 Aquatic Biodiversity. Where does the color of the coral come from? What are benefits of coral reefs?. 75% of Earth is covered with water. Salinity of the water determines the type of life that can survive. Benefits of a marine ecosystem. Levels of ocean feeders: . Plankton

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Ch. 6 Aquatic Biodiversity

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  1. Ch. 6 Aquatic Biodiversity

  2. Where does the color of the coral come from? • What are benefits of coral reefs?

  3. 75% of Earth is covered with water • Salinity of the water determines the type of life that can survive

  4. Benefits of a marine ecosystem.

  5. Levels of ocean feeders: • Plankton • Phytoplankton • Zooplankton • Ultraplankton • Nekton • Turtles • fish • Benthos- bottom dwellers • Oysters, lobsters, crabs, worms • Decomposers • Specialized bacteria

  6. Ocean Layers • Euphotic zone: brightly lit surface layer. • Nutrient levels low, dissolved O2 high, photosynthetic activity. • Bathyal zone: dimly lit middle layer. • No photosynthetic activity, zooplankton and fish live there and migrate to euphotic zone to feed at night. • Abyssal zone: dark bottom layer. • Very cold, little dissolved O2.

  7. Estuary and Coastal Wetlands • Estuaries are rivers that meet the sea where seawater mixes with freshwater. • Coastal wetlands are land areas covered with water some or all of the year. • river mouths, inlets, bays, sounds, salt marshes=temperate zones • Mangrove forests=tropical zones

  8. Mangrove Forests

  9. The coastal zone

  10. Types of Lakes • Oligotrophic- lacking nutrients, cold, clear, low NPP • trout • Eutropic- well nourished, shallow, murky, high NPP • Mesotrophic- between two extremes • Cultural eutrophication- when runoff from farmland and building sites increases nutrients in lakes quickly

  11. Benefits of Inland wetlands • Replenish streams during drought • Replenish aquifers • Maintain biodiversity • Supply products like fish, timber

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