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Rahman M.M.,Kochi University | Rahman M.M.,Silvacom Ltd | Guogang Z.,Ehime University | Islam K.S.,Xiamen University
Tropical Conservation Science | Year: 2010

The tropical moist deciduous Sal (Shorea robusta) forest ecosystem of central Bangladesh is currently in a critical situation. Destructive anthropogenic and natural impacts coupled with overexploitation of forest resources have caused severe damage to the forest ecosystem. Sal is usually harvested for construction works, fuel wood, timbers, tannins, pillars, and furniture making purposes. The rapidly expanding agriculture in the forest land is a significant threat to the Sal forest ecosystem. This forest has been rapidly exhausted in recent times due to rubber monoculture and expanding commercial fuel-wood plantations. Due to illegal cutting, encroachment of forest areas, and illegal poaching of wildlife, the Sal forest is losing biodiversity at an alarming rate. The present status of the Sal forest ecosystem has been briefly discussed in this paper. After reviewing contemporary literature and analyzing findings of published research regarding the present threats to the Sal forest ecosystem of Bangladesh, this study recommends adoption of a sustainable forest management strategy based on scientific concepts of advanced silviculture. Furthermore, the requirement of further scientific research for better understanding of the Sal forest ecosystem has been stressed. Finally, this paper asserts that conservation and protection of the Sal forest ecosystem of Bangladesh can be achieved if sustainable forest management strategies are developed by involving all relevant stakeholders in the policy formulation process.

Rahman M.M.,Kochi University | Rahman M.M.,Silvacom Ltd | Islam K.S.,Xiamen University
AACL Bioflux | Year: 2010

The Sundarban forest, located in the southwest of Bangladesh, is one of the largest continuous blocks of mangrove forests in the world. This mangrove forest ecosystem in Bangladesh is now in captious position. Negative natural and anthropogenic impacts and overexploitation of natural resources have caused severe damage to the ecosystem. Growing human population with few alternative livelihood opportunities poses a serious threat to the mangrove forest. The rapidly expanding shrimp farming industry is a significant threat to the mangrove forests of Bangladesh. Due to illegal cutting, encroachment of forest areas and illegal poaching of wildlife, the mangrove forest is losing biodiversity in an alarming rate. This forest ecosystem also has become vulnerable to pollution, which may have changed the ecosystem's biogeochemistry. Further threats arise from global climate change, especially sea level rise. This study seeks to identify the root causes of deterioration of the Sundarban mangrove forest in Bangladesh. It also recommends the application of sustainable management strategies covering needs for an advanced silvicultural system, improvement of scientific research as well as conservation measures.

Rahman M.M.,Ehime University | Rahman M.M.,Kochi University | Rahman M.M.,Silvacom Ltd | Chongling Y.,Xiamen University | Islam K.S.,Xiamen University
Contemporary Problems of Ecology | Year: 2011

Accumulation and distribution pattern of cadmium (Cd) and its toxic effect on growth of the mangrove plant of young Kandelia candel seedlings have been examined. This study demonstrated that under high concentration of Cd stress, the total biomass of K. candel decreased 41. 57% compare to control (CK). At the end of 90 days exposure to 25 mg/l Cd, the average seedlings stem height and leaf number of the K. candel decreased by 30.54 and 42.68%, respectively. The results showed that K. candel seedlings, under the experimental condition, accumulated higher concentration of Cd in their roots (411. 29 ± 3. 60 mg/kg) when compared to hypocotyls, stems and leaves. More than 95% of Cd was accumulated mainly in roots. The distribution pattern of Cd concentration in K. candel seedlings was found in the following order: roots > hypocotyls > stems > leaves. Based on the leaf symptoms and morphological change of K. candel seedlings under heavy metal stress, this study showed that Cd is phytotoxic to K. candel. © 2011 Pleiades Publishing, Ltd.

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