What is seaweed?
Multicellular algaeKingdom ProtistaPrimary producers chlorophyll to transform light energy from
the sun into chemical energy
Observe seaweed and land plant… what are differences? Similarities?(use a Venn Diagram)
How are seaweeds different from plants?
Differences
Land Plants Seaweed
Roots YES No roots, holdfasts
Nutrients From roots Through cells, surrounding water
Support Vascular System Hydrostatic
Water Fresh Salt
How would you classify seaweed?
Did you know….
There are 3 main types of seaweed?
Chlorophyta (Green algae)
Phaeophyta (Brown algae)
Rhodophyta (Red algae)
Green algae (Chlorophyta)
Pigments: Chlorophyll
Fresh water, Brackish water, and coastal waters
Only 10% of 6-7000 species are marine
Ulva
Examples of Chlorophyta
Halimeda
•Calcareous green algae helps in coral reef growth.
Examples of Chlorophyta
Neomeris
Cladophoropsis
Brown Algae (Phaeophyta)
Pigment: chlorophyll AND additional colors to make it brown
Dominate colder region coastlines
Size: small and delicate to large and thick
Kelp
Examples of Phaeophyta
SargassumPadina
Laurencia
Dictyoda
Examples of Phaeophyta (Kelp)
Laminaria
Nereocystis
MacrocystisHow tall would you be if you grew 20 inches per day?
Red algae (Rhodophyta)
Pigments: chlorophyll AND red or blue
Dominant algae in the tropics, grow in all oceans
Deepest depths
Red > Green + BrownPterocladia
Examples of Rhodophyta
Liagora
Galaxaura
Examples of Rhodophyta
Gracilaria (Ogo)
Examples of Rhodophyta
CorallineEncrusting Branching
What type of marine animal does this look like?
And even more examples!
Chondrus - Irish Moss
Botryocladia
Amansia
Would you consider boiling one of these to make pudding?
Make a list 1-8… walk around and decide what Phylum each belongs to.
Invasive Seaweed
The Super Sucker!
Uses of Seaweed
How do you think people use seaweed?
Using the reading list down 10 uses for seaweed (only 5 can be food related)
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