Protist Diversity BIOL 1407

Protists Eukaryotes that are not plants, animals or fungi Area of intense research Taxonomy in flux

Protists ≠ Clade Informal Groups: –Algae –Protozoans –Fungal-like protists Photo Credit of Kelp: Stef Maruch, 2007, Wikimedia Commons

Body Organization Unicellular Colonial Multicellular Dinobryon, a colonial golden brown alga Bonnemaisonia hamifera (a red alga)

Membrane Transport Gas exchange Waste disposal Water balance Ion balance Ciliates (Stentor and Paramaceium)

Water Balance Watch videos of Contractile Vacuoles transport.htm#Paramecium_- _Contractile_Vacuoleshttp:// transport.htm#Paramecium_- _Contractile_Vacuoles du/allen/ch09/video/vid-1/ du/allen/ch09/video/vid-1/

Nutrition Autotrophs Heterotrophs –Ingestive –Absorptive Mixotrophs

Algae Autotrophic protists Some mixotrophs Important in food chains in aquatic habitats Includes –Phytoplankton –Seaweeds Euglena

Diatoms

Dinoflagellates

Green Algae: Volvox

Seaweed: Red Algae

Seaweed: Brown Algae

Protozoans Ingestive heterotrophs Mostly unicellular Planktonic or sessile Free-living or parasites

Ciliates

Foraminiferans

Radiolarians

Giardia

Plasmodium

Trypanosoma

Fungal-like Protists Resemble fungi during life cycle Make spores More closely related to amoeboids than fungi Photo Credit: Dr. Tom Volk, 3.html 3.html

Plasmodial Slime Molds

Cellular Slime Molds

The End Unless otherwise specified, all images in this presentation came from: Campbell, et al Biology, 8 th ed. Pearson Benjamin Cummings.