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algae and its uses -highschool reference.ppt
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- 2. Three main divisionsof marine algae in Three main divisions of marine algae in Kingdom Protista: Kingdom Protista: • Chlorophyta – green algae • Rhodophyta – red algae • Phaeophyta – brown algae
- 3. Range in sizefrom tiny microscopic life to giant ocean kelps over a hundred feet long!
- 4. Psycho Phycos Psycho Phycos •“ “phykos” = Greek for “alga” phykos” = Greek for “alga” • Phycology = study of algae Phycology = study of algae • Phycologist = someone who studies Phycologist = someone who studies algae algae Every Phycologist’s Pet Peeve: Every Phycologist’s Pet Peeve: • “Alga” is singular • “Algae” is plural • “Algaes” do not exist!!!
- 5. Phylum Chlorophyta • Greenalgae Green algae • 7000 diverse species • Biologist reason that green algae give rise to land plants. • Both green algae and land plants have chlorophyll a and B as well as carotenoids and store food as starch • Both have walls made of cellulose
- 6. Phylum Phaeophyta • 1500species of Brown Brown algae algae • Mostly marine and include seaweed and kelp • All are multicellular and large (often reaching lengths of 147 feet) • Individual alga may grow to a length of 100m with a holdfast, stipe and blade • Used in cosmetics and most ice creams
- 7. Phylum Rhodophyta • 4000species of RED Algae RED Algae • Most are marine • Smaller than brown algae and are often found at a depth of 200 meters. • Contain chlorophyll a and C as well as phycobilins which are important in absorbing light that can penetrate deep into the water • Have cells coated in carageenan which is used in cosmetics, gelatin capsules and some cheeses
- 8. Phylum Euglenophyta • 1000species of Euglenoids • Have both plantlike and animal-like characteristics • Fresh water
- 9. Other Phylum Representatives Diatoms– used in detergents, Diatoms – used in detergents, paint removers, toothpaste paint removers, toothpaste Dinoflagellates – red tides Dinoflagellates – red tides Important in the formation of petroleum products Golden algae Golden algae
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- 12. Halimeda meadows formimportant habitat
- 13. Algae is usedfor many purposes • Fertilizer • Food for humans and animals • Hawaiiian cultural practices • Extracted products: – potash – algin – carrageenan – agar
- 14. Most common algaeused for food worldwide • Porphyra (nori) • Gracilaria (ogo) • Rhodymenia (dulse) • Chondrus crispus (Irish moss)
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- 16. Nori: better thanpotato chips! Also high in…. • Iodine • Vitamin B12 • Riboflavin • Calcium • Fiber
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- 20. Agar Agar • Extracted fromRhodophyta
- 21. Algin/Alginate & Potash Algin/Alginate& Potash • Extracted from Phaeophyta
- 22. Identify, then…IRON CHEF:Limu 1. Identify each alga by Genus species & Hawaiian name Use a recipe or create your own recipe using algae!
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- 25. Codium Codium (Limu wawae’iole) (Limu wawae’iole) “Rat’sfoot” “Rat’s foot”
- 26. Common Algae ( CommonAlgae (Limu Limu) Eaten in Hawaii ) Eaten in Hawaii Sargassum (Limu kala) Dictyopteris (Limu lipoa)
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- 30. Limu Limu NOT commonlyeaten in Hawaii NOT commonly eaten in Hawaii Caulerpa Caulerpa “Sea grapes” “Sea grapes”