Unformatted text preview: lankton • Each has two flagella • Algal bloom is population explosion of dinoflagellates Called “The Red Tide” • Can produce a neurotoxin poisonous to fish, shellfish and humans Brown Algae (Phaeophyta):Autotrophs Brown Algae (Phaeophyta):
• 1,500 species • Most abundant in temperate Macrocystis seas • Contain chlorophylls a and c, and fucoxanthin • Range in size from tiny filaments to giant kelps • Harvested for ALGIN and KELP Fig. 22-13, p. 361 Red Algae (Rhodophyta):Autotrophs Red Algae (Rhodophyta):
• 4,100 species • Most abundant in tropical • • •
seas Can grow at great depths Complex life cycles may include very different forms Used for AGAR (to thicken growth media and gel capsules for drugs, CARRAGEENAN thickens sauces,and PORPHYRA...
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