• Aquatic biomes are determined mainly by sunlight and concentrations of dissolved oxygen and nutrients in the water.
  • The availability of that sunlight has a direct impact on the productivity and biodiversity of aquatic ecosystems.
  • Two ocean zones are particularly challenging to marine organisms: the intertidal zone and the deep ocean.
  • Marine Protected Areas are no-fishing zones that have recently been established up and down the California coast, allowing fish to breed, grow large, and replenish waters.
  • Scientists monitor these areas to determine if they are working.
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