Macroalgae Chapter 6

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Macroalgae- Chapter 6
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Why Study Seaweeds?

• Why not?
• To be useless, various, and abstruse is
  sufficient recommendation of a science to make it
  pleasing to me.
• William Harvey (1811-1866)

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• How do humans use seaweeds?
• How do marine animals use seaweeds?

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Photosynthesis

• Photosynthesis- the production of carbohydrates
  from carbon dioxide and water in the presence of
  chlorophyll using light energy.
• 6CO2 12H2O ---gt C6H12O6 6O2 6H2O

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Summary of Photosynthesis
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Light Penetration vs. Depth
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• Albert Einstein- proposed the Particle Model of
  Light in 1905.
• Light is composed of particles of energy called
  photons.
• Visible light has different photon wavelengths.

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Absorption Spectra for Several Plant Pigments
450
430
Phycobilins- 500-660
445
480
660
410
640
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Seaweed and Plant Cells
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Light Reactions
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Chlorophyta- green algae

• Characteristics
• Examples- Ulva Codium.

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Rhodophyta- red algae

• Characteristics
• Examples- Porphyra, Corallina.

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Nori Mariculture
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Heterokontophyta- heterokonts
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Phaeophyceae- brown algae

• Characteristics
• Examples- Fucus, Macrocystis, Nereocystis.

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Phylum- Anthophyta

• Characteristics
• Examples- Phyllospadix, Zostera.

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