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Ecological Roles of Protists

Ecological Roles of Protists. 21.3. http://www.bing.com/images/search?q=algae&qpvt=algae&FORM=IGRE#view=detail&id=1C5F87CADB61E1E2EBCD8CCEE5A76E44A11F45B3&selectedIndex=17.

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Ecological Roles of Protists

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  1. Ecological Roles of Protists 21.3 http://www.bing.com/images/search?q=algae&qpvt=algae&FORM=IGRE#view=detail&id=1C5F87CADB61E1E2EBCD8CCEE5A76E44A11F45B3&selectedIndex=17

  2. The position of photosynthetic protists at the base of the food chain makes much of the diversity of aquatic life possible

  3. Roles p. 611 • Feeding fish and whales • Supporting coral reefs • Providing shelter • Recycling wastes • POPCORN READ!

  4. Heterotrophic protists • Amoebas • Capture and digest their food, surrounding a cell or particle and form a FOOD VACUOLE • A small cavity in the cytoplasm that temporarily stores food

  5. Ciliates Paramecium • Use cilia to sweep food particles into the GULLET • Indentation in one side of the organism

  6. Slime Molds • Thrives on decaying matter • Damp and rich in organic matter (forest floor) • Great recyclers • What is a plasmodium (glossary)?

  7. Protists that absorb • Water molds (grow on dead/ decaying matter) • White fuzz on fish 

  8. Mutualists/ Symbiotic • Many protists are involved in mutualistic symbioses; host and they benefit • Use p. 614 and write an example like this in your notes

  9. Parasites and Disease • Parasitic protists are responsible for some of the world’s most deadly diseases, including several kinds of debilitating intestinal diseases, African sleeping sickness and malaria • Read (p. 615-616) about each of the above three diseases and write down their symptoms • Be able to interpret the Plasmodium life cycle on p. 616

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