ALGAE Plantlike Protists

ALGAE Plantlike Photosynthetic Some are capable of moving Unicellular and multicellular phyla

Unicellular Algae 4 phyla of unicellular algae: 1)Euglenophyta 2)Chrysophyta 3)Bacillariophyta 4)Pyrrophyta

Euglenophytes Phylum Euglenophyta Have 2 flagella No cell wall Example: Euglena

Chrysophytes Phylum Chrysophyta Golden algae Have golden colored chloroplasts Store food in the form of oil

Diatoms Phylum Bacilliariophyta Thin delicate cell walls rich in Si (silicon) Cell walls are 2 sided like a petri dish Diatomaceous earth: used in toothpaste, reflective, and cleansers All live in salt water

Dinoflagellates Belong to phylum Pyrrophyta Use 2 flagella most are photosynthetic Covered by cellulose plates Many are bioluminescent Cause “red tide”

Ecology of Unicellular Algae Important part of water ecosystems Make up much of the phytoplankton that serve as the basis of food chains in water environments Produce O2 Algal blooms may deplete water of nutrients and oxygen (red tide)