Groups of Algae

1
Groups of Algae

• There are three groups of multicellular algae
• Green algae
• Brown algae
• Red algae
• These algae get their color from the pigments in
  their cells.

2
The Green Algae

• Found in Phylum Chlorophyta
• Green algae can be found as single cells,
  colonies, and as multicellular organisms.
• Reproduce both sexually and asexually.

3

• Volvox are green algae that live in colonies.
• The volvox in these colonies communicate and
  share resources.
• Spirogyra are threadlike green algae. These
  threadlike colonies are called filaments.
• Ulva is an example of a multicellular algae. It
  is sometimes called sea lettuce.

4
The Brown Algae

• Phylum Phaeophyta
• Commonly called sea weeds
• The largest brown algae is kelp
• Many brown algae have bladders filled with air to
  help them float.

5
The Red Algae

• Phylum Rhodophyta
• Red algae live anywhere from the waters surface
  down to a depth of 170 meters.
• One species of red algae is often used to wrap
  rice in sushi rolls in Japan.