| 1 | Seaweeds of the mangrove and associated ecosystems The seaweeds of the mangrove and associated ecosystems are discussed. Seaweeds occur not only in the sea but also in various marine environs such as estuaries, backwaters, mangroves and other associated ecosystems. In general, mangrove environment is unfavourable for the growth of many macroalgae because of lack of suitable substratum. Thick carpets of green algae like Caulerpa and Cladophoropsis grow on the mangrove mud under the shade provided by the mangrove canopy. Zonation of algae in the mangrove environment is governed by tides. Algae such as Bostrychia radicans and Caloglossa leprieuri, occurring on the roots of Rhizophora and Avicennia are found distributed throughout the year showing tolerance to fluctuating salinities. Mangroves are in close association with seagrass and coral reef ecosystems. Seaweeds can be employed successfully for monitoring heavy metal pollution in the mangrove environment as they are the 'Sentinel' organisms for heavy metals and their bioaccumulation is several thousand times with respect to water concentration Source: Kannan, L. Conservation of mangrove forest genetic resources: A training manual. Deshmukh, S.V. ; Balaji, V. eds. 1994; 283-286. 0849. | ||
| 2 | Marine flora of Andaman and Nicobar group of Islands, Andaman Seas, India Marine microphytes form an important constituent of island ecosystem. Therefore the present study is an account of mangroves, seaweeds and seagrasses from Andaman and Nicobar Islands. Mangroves in Andaman are represented by 27 spp but Rhizophora mucronata Lamk and R. stylosa Griff forms the dominant vegetation. While anly 10 spp are recorded in Nicobar. Maximum of seven species of seagrasses were recorded from Katchal and Nancowry in Nicobar however only four species were recorded from Andaman. A total of 105 species of sea weeds have been recorded in Andaman and Nicobar islands Source: Jagtap, T.G. Andaman and Nicobar Islands: Challenges of developments. Suryanarayan, V. ; Sudarsen, V. eds. 1994; 133-143. 0880.
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