1. Algae and Seaweed Algae Video Do Now

2. Algae Algae are classified as Protists
They have plant-like characteristics
They photosynthesize
It can be categorized as green, brown, and red algae

3. Microalgae VS Macroalgae
Microalgae is unicellular, examples are diatoms and dinoflagellates
They are part of the green group

4. Macroalgae is also known as seaweed and is multi-cellular

5. 3 Types of Algae
1. Brown Algae
2. Red Algae
3. Green Algae

6. Brown Algae Has pigment fucoxanthin - gives brown/olive green color
Can live deeper than green algae
Includes all kelps
Important in structuring the kelp bed and kelp forest ecosystems

7. Brown Algae Holdfast (roots) Stipe (stem) Blade (leaf) Pneumatocyst
Parts of a Kelp Plant
Holdfast (roots)
Stipe (stem)
Blade (leaf)
Pneumatocyst

8. Why is Kelp Important? The sunlight is captured by the kelp plants
It uses the light energy to grow
Organisms eat the kelp and use it for shelter (i.e. sponges, otters, lobsters, hermit crabs, sea stars etc...)

9. Fucus (Rockweeds)
Nereocystis
(Bullwhip Kelp)
Postelsia
(Sea Palm)
Egregia (Feather Boa)

10. 2 Types of Kelp 1) Laminaria Form kelp beds (no surface canopy)
2) Macrocystis (Giant Kelp)
May reach 100 m and grow up to 50 cm/day

11. Macrocystis with pneumatocysts

12. Red Algae
Contain accessory pigments called phycobilins that mask chlorophyll
Some have coralline forms (incorporate calcium carbonate into tissues)

13. Green Algae An example is sea lettuce
It’s often found in shallow water and growing near rocks

14. Economic Importance
Algin (extracted from kelp).Used as a thickener and emulsifier in ice cream, cosmetics
Agar (extracted from red algae), used in some jellies
Beta Carotene (extracted from green algae)
Carrageenan (extracted from red algae)
Thickens many dairy products