Ecological Roles of Protists21.3

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

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

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

Ciliates Paramecium Use cilia to sweep food particles into the

GULLET Indentation in one side of the organism

Slime Molds Thrives on decaying matter Damp and rich in organic matter (forest

floor) Great recyclers What is a plasmodium (glossary)?

Protists that absorb Water molds (grow on dead/ decaying

matter) White fuzz on fish

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

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