give the economic importance of algae.
Economic Importance of algae
Carbon dioxide fixation on earth is majorly carried out by algae.
Important as primary producers of energy-rich compounds.
Example − Sargassum, Laminaria, and Porphyra used as food.
Some brown and red algae species produce water-holding hydrocolloids.
Example − Algin (brown algae) and carrageen (red algae)
Agar produced by Gelidium and Gracilaria is used to grow microbes and in preparation of ice creams and jellies.
Chlorella and Spirulina are protein-rich unicellular algae, used as food supplements. They are also known as space food.