N. A. Siddiqi , M. J. Alam

Abstract

Shoreline and offshore islands of Cox's Bazar District (Bangladesh) supported dense and scattered natural mangrove vegetation. Huge mangrove plantations have also been established on the exposed coastline. Naturally occurring mangroves have virtually vanished due to shrimp farming, expansion of salt production area and various forms of human pressure. Recently created mangrove plantations are also under severe stress for similar reasons and in the process of deterioration. Adequate measures should to be taken for the rehabilitation and conservation of mangroves. Coastal environment needs to be rationally utilized for sustainable production of various resources and maintenance of stable ecosystems.

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N. A. Siddiqi

Abstract

Studies made on the scope of artificial regeneration in the mangrove of Sundarbans, Bangladesh showed uncertain prospect due to browsing of the panted seedlings by the Spotted Deer (Axis axis). The Deer had a significant detrimental effect on the regeneration of Heritiera fornes, Xylocarpus mekongensis, Bruguiera sexangula, Ceriops decandra and Avicennia officinalis. Only Excoecaria agallocha was found to overcome the influence of Deer browsing to a large extent.

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N. A. Siddiqi , M. Shahidullah , M. A. H. Shahjalal

Abstract

Studies on fruiting time, germination success, seedling raising, seedling growth and survival after out planting were carried out from 1987 to 1989 in the Sundarbans mangrove forest. Matured seeds were mainly available from February to April. Weight of a seed varied from 80 to 120 gm and on average 1 kg contained 10 to 12 seeds. Germination of seeds was 92 to 95% and yearly variation in germination was not noticed. Within 60 days the seedlings attained an average height of 24 cm. Maximum survival (68%) was obtained from planting larger seedlings.

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