Marine Algae The Seaweeds

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Marine AlgaeThe Seaweeds
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Types of Algae

• Chlorophyta Green
• Phaeophyta Brown
• Rhodophyta Red

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The Green Algae

• Have the same pigments as land plants
• More than 7,000 species
• Marine algae are macro
• Alteration of generations

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Acetabularia
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Caulerpa spp
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Caulerpa spp
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Caulerpa floridana
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Caulerpa racemosa
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Caulerpa spp
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Caulerpa spp
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Chaetomorpha
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Halimeda spp
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Udotea spp
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Ulva lactuca
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Ventricularia spp
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Phaeophyta

• Largest and most complex of the algae
• All are marine
• Brown color comes from accessory pigments

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Dictyota
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Fucus
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Fucus
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Laminaria
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Padina
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Turbinaria
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When Columbus reached the deep blue waters of the
central North Atlantic, he thought he was very
close to shore. After all, there was suddenly an
abundance of plant life in the form of a floating
algae, which he called, simply, "weed." His
sailors, meanwhile, feared that their ships would
become irretrievably entangled in the stuff.
Their fears were misplaced as were Columbus'
hopes. The weed which scientists ultimately
dubbed sargassum, after a Portuguese word for it
is neither sturdy nor abundant enough to
ensnare a ship of any size. And even the
westernmost boundaries of the Sargasso Sea a
two-million-square-mile ellipse of deep-blue
water adrift in the North Atlantic lie many
hundreds of miles from the North American shore
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Sargassum
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Kelp
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Rhodophyta

• Greek word Rhodos Red
• Accessory pigment phycoerythrin gives the red
  color plus allows them to survive at greater
  depths.
• Phycoerythrins are also found in cyanobacteria

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Halimenia spp
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Halimenia spp
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Renouxia spp
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Rhodogrodon spp
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Sebdenia spp
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Trichoglowia spp
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Corraline red alga
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Hydrolython spp
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Peyssonellia spp