Importance of seaweeds Food • Seaweeds are consumed by <strong>coast</strong>al people, particularly in Japan, China, Korea, Taiwan, Phillippines, Thail<strong>and</strong>, Cambodia, Vietnam, South Africa, Indonesia, Peru, Chile, Sc<strong>and</strong>inavia, Irel<strong>and</strong> <strong>and</strong> Scotl<strong>and</strong>. • Seaweeds are also harvested or cultivated for the extraction of alginate, agar <strong>and</strong> carrageenan • Agar <strong>is</strong> used in foods such as confectionery, meat <strong>and</strong> poultry products, desserts <strong>and</strong> beverages <strong>and</strong> moulded foods. • Carrageenan <strong>is</strong> used in salad dressings <strong>and</strong> sauces, dietetic foods, <strong>and</strong> as a preservative in meat <strong>and</strong> f<strong>is</strong>h products, dairy items <strong>and</strong> baked goods. Medicine • Alginates are used in wound dressings, <strong>and</strong> production of dental moulds. • Agar <strong>is</strong> extensively used as culture medium. • Carrageenans, alginates <strong>and</strong> agaroses (the latter are prepared from agar by purification), together with other lesser-known macroalgal polysaccharides, also have several important biological activities or applications in biomedicine. • Seaweed <strong>is</strong> a source of iodine, necessary for thyroid function <strong>and</strong> to prevent goitre. • Seaweeds may have curative properties for tuberculos<strong>is</strong>, arthrit<strong>is</strong>, colds <strong>and</strong> influenza, worm infestations <strong>and</strong> even tumors. • Seaweed extract <strong>is</strong> used in some diet pills. Other seaweed pills exploit the same effect as gastric b<strong>and</strong>ing, exp<strong>and</strong>ing in the stomach to make the body feel more full.
Mangrove Ecosystem • Mangroves are tidal forest. • 100 species of true mangroves have been described from the world. • Mangrove vegetation represents trees, shrubs, herbs, climbers, epiphytes <strong>and</strong> parasites. Mangroves, A&N Isl<strong>and</strong>s • Mangroves occur 112 countries mainly in the tropical region of the world with an area of 1,89,399 sq.km.