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7-1 Freshwater Ecosystems

7-1 Freshwater Ecosystems. Page 173. A. Characteristics of Aquatic Ecosystems. 1. Freshwater Ecosystems include lakes, ponds, rivers, streams, and wetlands (land that is periodically under water ). A. Characteristics of Aquatic Ecosystems.

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7-1 Freshwater Ecosystems

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  1. 7-1 Freshwater Ecosystems Page 173

  2. A. Characteristics of Aquatic Ecosystems • 1. Freshwater Ecosystems include lakes, ponds, rivers, streams, and wetlands (land that is periodically under water).

  3. A. Characteristics of Aquatic Ecosystems • 2. Plankton are drifters, they can not swim against the currents.

  4. A. Characteristics of Aquatic Ecosystems • 3. Nekton are free-swimming organisms such as fish and whales.

  5. A. Characteristics of Aquatic Ecosystems • 4. Benthos are bottom-dwellers such as mussels, worms, and barnacles.

  6. B. Lakes and Ponds • 1. Littoral zone is near the shore and aquatic life is diverse and abundant.

  7. B. Lakes and Ponds • 2. Benthic zone is the bottom of a pond or lake; inhabited by decomposers, insect larvae, and clams.

  8. B. Lakes and Ponds • 3. Eutrophication is an increase in the amount of nutrients.

  9. C. Freshwater Wetlands • 1. Wetlands provide a home for migratory wildlife and trap carbon so it is not released in the atmosphere.

  10. C. Freshwater Wetlands • 2. Wetlands act as filters because they remove pollutants from the water that flows through them.

  11. C. Freshwater Wetlands • 3. Two main types are marshes and swamps.

  12. C. Freshwater Wetlands • 4. Wetlands were previously considered to be breeding grounds for disease-carrying insects.

  13. C. Freshwater Wetlands • 5. Now that the importance of wetlands has been recognized, many wetland are federally protected.

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