“Kingdom”

Protista

Domain Eukarya

Characteristics of Protista

-All eukaryotes

-Most unicellular

-Some autotroph, some heterotroph, some both!

-All reproduce asexually (exception: conjugation)

-Mostly found in water (pond, ocean, lake, puddle)

Three “types” of protist

Animal-like (zooplankton)

-heterotrophs�-move (cilia, flagella, streaming)�-respond to environment

-3 phyla of note:

1. Sarcodina (Amoebas)
2. Sporozoa (Plasmodium)
3. Ciliophora (Paramecium)

Plant-like (phytoplankton)

-autotrophs, mostly single-celled algae

-have cell walls, chloroplasts

-3 phyla of note:

1. Chrysophyta (diatoms)
2. Pyrrophyta (dinoflagellates)
3. Euglenophyta (euglena)

Fungi-like (slime mold)

-heterotrophs (saprotrophs)

-found in shady, cool, damp areas

-reproduce via spores

8 stations to explore different phyla:

1. Only 4 people per station at a time�
2. Use textbook, slides, and images to help answer the questions�
3. Must be complete by end of lesson

Protista �Up Close

Animal-like phyla

Ciliophora (paramecium)

Moving via cilia

Sarcodina (Amoebas)

Pseudopods used to move and consume via cytoplasmic streaming

Sporozoa (Plasmodium)

Complex life cycle, reproduce via spores

Plant-like phyla

Chrysophyta (diatoms)

Silica cell walls

Pyrrophyta (dinoflagellates)

Euglenophyta (euglena)

Ecological Roles of Protista

Negative Ecological Roles of Protista

1. Many animal-like protists such as plasmodium are pathogenic and cause disease (e.g.malaria)

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Negative Ecological Roles of Protista

2) Plant-like protists such as euglena and diatoms can cause algae blooms (stifles life, consumes nutrients)

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Negative Ecological Roles of Protista

3) Plant-like dinoflagellate blooms can cause toxic “red tides”

Positive Ecological Roles of Protista

1. Many protists (plant- and animal-like) are symbiotic with animals (e.g. dinoflagellates and corals)

Positive Ecological Roles

2) Protists are food �sources for aquatic �animals (and us: ice cream, �sushi)

Positive Ecological Roles of Protista

3) Plant-like protists are primary producers (photosynthesis), supplying 80% of Earth’s oxygen

LAB

-Observe protista in the microscope, identify species, and measure/draw their dimensions

-Use eye dropper to collect some protists, place in depression slide, look under microscope

-Use “proto-slow” to slow them down and get a good look at their organelles

-When complete, continue to work on protista notes from yesterday