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      • 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
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      • Chapter 8: Aquatic Biodiversity
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      • Chapter 9: Sustaining Biodiversity: Saving Species and Ecosystem Services
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      • Chapter 24: Politics, Environment, and Sustainability
      • Chapter 25: Environmental Worldviews, Ethics, and Sustainability
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Chapter 8:  Aquatic Biodiversity


Section 1:  What is the General Nature of Aquatic Ecosystems?

​Concept 8-1A:  Saltwater and freshwater aquatic life zones cover almost three-fourths of the earth's surface, with oceans dominating the planet.

Concept 8-1B:  The key factors determining biodiversity in aquatic systems are temperature, dissolved oxygen content, availability of food, and access to light and nutrients necessary for photosynthesis.


Section 2:  Why Are Marine Ecosystems Important?

​Concept 8-2:  Saltwater ecosystems provide major ecosystem and economic services and are irreplaceable reservoirs of biodiversity.

Section 3:  How Have Human Activities Affected Marine Ecosystems?

Concept 8-3:  Human activities threaten aquatic biodiversity and disrupt ecosystem and economic services provided by saltwater systems.

Section 4:  Why Are Freshwater Ecosystems Important?

Concept 8-4:  Freshwater ecosystems provide major ecosystem and economic services, and they are irreplaceable reservoirs of biodiversity.

Section 5:  How Have Human Activities Affected Freshwater Ecosystems?

Concept 8-5:  Human activities threaten biodiversity and disrupt ecosystem and economic services provided by freshwater lakes, rivers, and streams.

​

Files:
APES Ch. 8 Presentation
File Size: 7697 kb
File Type: pptx
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APES Ch. 8 Glossary
File Size: 14 kb
File Type: docx
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APES Ch. Student Notes
File Size: 26 kb
File Type: docx
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Key Terms:
  • aquatic life zone
  • benthos
  • coastal wetland
  • coastal zone
  • coral reef
  • decomposer
  • estuary
  • euphoric zone
  • eutrophic lake
  • freshwater life zones
  • inland wetland
  • intertidal zone
  • lake
  • mangrove swamps
  • marine life zone
  • mesotrophic lake
  • nekton
  • oligotrophic lake
  • open sea
  • plankton
  • runoff
  • saltwater life zones
  • subsidence
  • surface water
  • watershed
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