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BROWN ALGAE (PHAEOPHYTA)

• GIANT KELP

 Common Name:  GIiant Kelp

 Genus and Species:   Macrocystis pyrifera

Distribution: This algae may be found throughout Southern California and tends to increase in forest size and abundance as you move further north along the California coast.

Habitat:  Giant kelp prefer rocky areas with slow moving cold water.

Predators:  Mostly purple urchins (Strongylocentrotus purpuratus), some herbivorous fish, and grazing snails.  In order to defend themselves the Giant Kelp has evolved air bladders at the end of each frond which are filled with a noxious gas which deter herbivorous fish.

Fun Facts: Giant kelp has many commercial uses, for instance this particular kelp is used in toothpaste to smooth it out, in paint so it applies easier, and ice-cream to smooth it out.  Kelp is also harvested as a source of fertilizer and iodine.  Giant kelp is also capable of growing anywhere from 12 to 18 inches a day, with some reports indicating it is possible for this algae to grow up to almost two feet in one hour!  That is almost fast enough for you to literally watch it grow!