Aquatic food webs
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Aquatic Food Webs. Connected to and affected by terrestrial food webs Examples? Humans, birds.

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Aquatic food webs
Aquatic Food Webs

  • Connected to and affected by terrestrial food webs

  • Examples?

  • Humans, birds


  • A Million to OneMarine food webs are usually longer than terrestrial food webs. Scientists estimate that if there are a million producers (algae, phytoplankton, and sea grass) in a food web, there may only be 10,000 herbivores. Such a food web may support 100 secondary consumers, such as tuna. All these organisms support only one apex predator, such as a person.


Aquatic food webs1
Aquatic Food Webs

  • Begin with…?

  • Microbes – phyto and zoo –plankton

  • These are the most abundant life form in the ocean

  • Produce over half the earth’s O2


Aquatic food webs2
Aquatic Food Webs

  • Productivity is greatest in euphotic zone – why?

  • Primary Consumers – copepods, shrimp, Larval fish and jellyfish


Marine resources
Marine Resources

  • They are finite and limited

  • Human use of resources has increased


Marine resources1
Marine Resources

  • What does the ocean provide us…?

  • Transportation, food, minerals (manganese, salt, sand),recreation, oil


Marine resources2
Marine Resources

  • The air we breathe

  • The food on your plate - algae and kelp are used in making peanut butter soymilk and frozen foods.

  • The items in your medicine cabinet shampoos, cosmetics, medicines

  • Jobs and the economy. One in six jobs in the United States is marine related


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