1 Review Give three examples of photosynthetic protists

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• 1 Review Give three examples of photosynthetic
  protists
• Predict How would ocean food chains change in
  the absence of photosynthetic protists
• 2 Explain By what two methods do parasitic
  protists primarily spread disease
• Form an Opinion Why are protist caused disease
  more widespread in tropical areas of the world.

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Ch 21 Protists and Fungi

• 21.3 The Ecology of Protists

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Autotrophic Protists

• Phytoplankton
• Red and brown algae
• Euglena
• Dinoflagellates.

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• Base of many aquatic food chains
• Half of Earths photosynthesis is carried out by
  phytoplankton
• Phytoplankton feeds both shrimp and some whales.

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• Provide coral reefs with energy and also calcium
  carbonate
• Brown kelp can grow up to 60 meters
• Can create algae blooms
• Red tide.

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Heterotrophic Protists
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Amoebas

• Surround a cell or particle and take it inside
  themselves to form a food vacuole
• Food vacuole
• Small cavity in the cytoplasm that temporarily
  stores food
• Materials are digested and nutrients removed
• Wastes stay in and food vacuole brings to edge of
  cell.

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Ciliates

• Use cilia to sweep food particles into gullet
• Gullet
• Indentation in one side of the organism
• Particles are forced into food vacuoles that form
  at base.

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• Food vacuoles pinch off into cytoplasm and fuse
  with lysosomes
• Waste materials are emptied when the food vacuole
  fuses with the anal pore.

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Slime Molds

• Key roles in recycling nutrients in an ecosystem
• Uses decaying organic material.

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Slime Molds

• Amoeba like cells.

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• Forms together into a large structure known as a
  plasmodium.

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• Plasmodium develops sporangia
• Meiosis produces haploid spores to continue the
  cycle inside.

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Mutualistic Protists

• Trichonympha and termites.

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Parasites and Disease

• Debilitating intestinal diseases, African
  sleeping sickness, and malaria.

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Intestinal Diseases

• Giardia
• Diarrhea causing found in streams
• Amebic dysentery
• Cryptosporidium
• Chlorine resistant, found in city water
• African Sleeping Sickness
• Trypanosoma carried by Tsetse fly.

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Malaria

• Plasmodium carried by Anopheles mosquito.

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