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  • AP Environmental Science
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    • Unit I: Humans and Sustainability: An Overview >
      • Chapter 1: Environmental Problems, Their Causes, and Sustainability
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      • Chapter 2: Science, Matter, Energy, and Systems
      • Chapter 3: Ecosystems: What are They and How Do They Work?
      • Chapter 4: Biodiversity and Evolution
      • Chapter 5: Biodiversity, Species Interactions, and Population Control
      • Chapter 6: The Human Population and Its Impact
      • Chapter 7: Climate and Biodiversity
      • Chapter 8: Aquatic Biodiversity
    • Unit III: Sustaining Biodiversity >
      • Chapter 9: Sustaining Biodiversity: Saving Species and Ecosystem Services
      • Chapter 10: Sustaining Terrestrial Biodiversity: Saving Ecosystems and Ecosystem Services
      • Chapter 11: Sustaining Aquatic Biodiversity and Ecosystem Services
    • Unit IV: Sustaining Natural Resources >
      • Chapter 12: Food Production and the Environment
      • Chapter 13: Water Resources
      • Chapter 14: Nonrenewable Mineral Resources
      • Chapter 15: Nonrenewable Energy
      • Chapter 16: Energy Efficiency and Renewable Energy
    • Unit V: Sustaining Environmental Quality >
      • Chapter 17: Environmental Hazards and Human Health
      • Chapter 18: Air Pollution
      • Chapter 19: Climate Disruption
      • Chapter 20: Water Pollution
      • Chapter 21: Solid and Hazardous Waste
      • Chapter 22: Urbanization and Sustainability
    • Unit VI: Sustaining Human Societies >
      • Chapter 23: Economics, Environment, and Sustainability
      • Chapter 24: Politics, Environment, and Sustainability
      • Chapter 25: Environmental Worldviews, Ethics, and Sustainability
  • Chemistry
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    • Matter

Section 1:  Freshwater Ecosystems

Chapter 7 Section 1 Presentation
File Size: 780 kb
File Type: ppt
Download File

Key Terms:
  • wetland
  • plankton
  • nekton
  • benthos
  • littoral zone
  • benthic zone
  • eutrophication
Main Ideas:
  • Aquatic ecosystems can be classified as freshwater ecosystems or marine ecosystems.  The plants and animals in aquatic ecosystems are adapted to specific environmental conditions.
  • Freshwater ecosystems include lakes, ponds, freshwater wetlands, rivers, and streams.  The types of freshwater ecosystems are classified by the depth of the water, the speed of the water flow, and the availability of minerals, sunlight, and oxygen.
  • Freshwater wetlands serve many functions within ecosystems.  They trap and filter sediments and pollutants; reduce the likelihood of a flood; and buffer shorelines against erosion.
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