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Protists Kingdom. Habitat -Most protists are aquatic (but some in soil). - Plankton are organisms that drift or swim near the surface of the water. Phytoplankton are responsible for half of the world’s photosynthesis and O 2 production. Characteristics. Eukaryote - PowerPoint PPT Presentation
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Protists Kingdom
Habitat-Most protists are aquatic (but some in soil).
-Plankton are organisms that drift or swim near the surface of the water. Phytoplankton are responsible for half of the world’s photosynthesis and O2 production.
Characteristics
• Eukaryote• Unicellular, colonial, multicellular• Autotrophic to heterotrophic, some are both• Three main groups:– Plant-like: Algae (producers, photosynthic) &
seaweed– Animal-like: Protozoa (consumers)– Fungal-like: slime-molds (consumers)
Algae
• Plant-like - phytoplankton/ photosynthesis• Classified by type of pigment– Diatoms: shelled algae– Chlorophyta: green algae– Euglenophyta: euglena– Dinoflagellata: red tide– Chrysophyta: golden algae– Phaeophyta: brown algae– Rhodophyta: red algae
ChlorophytaGreen algae
• Unicellular to multicellular• Some seaweed
Euglenophyta
Euglenophyta
• Unicellular• Both photosynthetic & heterotrophic• Moves by a flagella• Has an eyespot (moves toward light)
ChlorphytaGreen Algae
• 8000 species• 9o% freshwater• 10% seaweeds (tropical)• Ancestor of land plants (spirogyra)
Diatoms
• Unicellular• Covered with a silica shell
Water filters
Diatoms
• Diatomite is used as an insulating material against both heat and sound,
• in making dynamite and other explosives, • for filters, • abrasives, • Diatoms have deposited most of the earth’s limestone• petroleum is of diatom origin.
Dinoflagellates
• dinoflagellates are important constituents of plankton, and as such are primary food sources in warmer oceans. Many forms are phosphorescent
Red Tide (Fire Algae)
bioluminiscence
RhodaphytaRed algae
• role in building reefs
Multicellular
Deep water Seaweed
Human foodsource
PhaeophytaBrown algae
• Multicellular
Sargassum & Kelp
Protozoaanimal-like
• Unicellular• Classified by movement• Heterotrophs• 30,000 species
flagella
Ciliates
Amoeboid
Brain-Eating Amoeba Thrives in Warm, Fresh WaterThe dangerous amoeba has killed three people this summer.