Chapter 6 Biomes and Aquatic Ecosystems



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Chapter 6




























Aquatic Ecosystems



Aquatic Ecosystems

  • Differ from terrestrial ecosystems

  • Temperature variations usually less pronounced

  • Salinity a major factor (Fresh water vs. salt water)

  • Three major groups of aquatic organisms-

    • 1. Plankton (Microscopic, carried by current)
    • a. Zooplankton = Protozoans (animals)
    • b. Phytoplankton = Photosynthetic
    • 2. Nekton- Large, swimming organisms (fish, turtles, etc.)
    • 3. Benthos- Bottom dwelling organisms/Sessile and mobile


Plankton, nekton or benthic?



Freshwater Ecosystems

  • Flowing-water ecosystems change greatly between the source (start) and the mouth (end).



  • Source  headwater tributaries 

  •  flood plain  meanders 

  • Estuary (Salt marsh) mouth  delta

  • The Hudson River

  • ADK’s to NYC:

  • Lake Tear of the Clouds …Albany…Newburg… NYC mouth (delta) …Atlantic ocean





Mount Marcy- Elevation 5344 ft.











Estuaries

  • Where “rivers meet the sea”

  • Very productive ecosystems!





































Coral Reefs

















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