Aquatic Ecosystems - Biomes













FUNDAMENTAL DIFFERENCES
Terrestrial vs. Aquatic Biomes

    • Boundaries:
    • Buoyancy: "cheaper" place to live (whales!)
    • Water less limiting (more?)
    • Oxygen less abundant
    • Nutrients less abundant (often limiting)
    • Temperature fluctuations less

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AQUATIC BIOMES -or-
COMMUNITY TYPES


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      Buoyancy - life forms

    • Plankton: most abundant aquatic organisms
      • Phytoplankton - free-floating, photosynthetic
      • Zooplankton - primary or secondary consumers
    • Nekton - strongly swimming
    • Benthos - bottom-dwelling

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      Nutrients
      • Nutrients [vs. climate] primary determinant of distributions
      • Upwelling

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      Benefit to Humans
      • Our primary food source,
          feeds ~ ½ world popn.
        80% world popn. less than 60 mi from sea
      • Water (rain!)
      • Recreation

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