A field research was undertaken to investigate the effects of saltmarsh restoration and some eco-engineering activities on the climate change impact mitigation and community adaptation in the coastal environment of Sonadia Island, Cox’s Bazar, Bangladesh. Two research sites viz., saltmarsh restoration site (SMRS) and impacted site (IP) were selected for this study. Amount of carbon assimilation by saltmarsh plant Porteresia coarctata at SMRS was increased from 165.17 ± 68.35 to 198.18 ± 41.32 g/m² during the study. The highest carbon assimilation (198.18 ± 41.32 g/m²) was noticed during winter, while the highest biomass (10.47 ± 0.25 kg/m²) was measured from SMRS. Soil compactness, organic matter, organic carbon, field water capacity, plant height, plant biomass and shoot density were found to be significantly (p < 0.05 to 0.01) higher in the SMRS than that of the IS. Seasonal variations of air temperature, water temperature, water pH, water salinity, water transparency, tidal height, inundation period, wave velocity, soil temperature, soil pH, pore water salinity, sedimentation, soil texture particle density, plant height, biomass and shoot density at different significance levels (p < 0.05 to p < 0.01) were noticed throughout the study. Correlation matrix showed that the plant height, biomass and shoot density were positively correlated with sedimentation, and negatively correlated with wave velocity at different significant levels (p < 0.05 to p < 0.01). From the present study, it is evident that SMRS, which was controlled and managed with some artificial inputs not only showed the elevated levels of plant height, biomass, shoot density, sedimentation and carbon assimilation but also exhibited remarkable changes in some of the factors studied rather than impacted site (IS), the findings of which could be helpful for the protection of coastal environment as well as mitigation of climate change impact that will ultimately save the local community from natural calamities in the long run.

进行了实地研究，以调查盐沼恢复和一些生态工程活动对孟加拉国科克斯巴扎尔索纳迪亚岛沿海环境中气候变化影响缓解和社区适应的影响。本研究选择了两个研究地点，即盐沼恢复地点 (SMRS) 和受影响地点 (IP)。在研究期间，盐沼植物Porteresia coarctata在 SMRS的碳同化量从 165.17 ± 68.35 增加到 198.18 ± 41.32 g/m ²。冬季碳同化最高(198.18 ± 41.32 g/m ² )，而生物量最高 (10.47 ± 0.25 kg/m ²) 是从 SMRS 测量的。发现 SMRS 中的土壤紧实度、有机质、有机碳、田间持水量、植物高度、植物生物量和枝条密度显着（p < 0.05 至 0.01）高于 IS。气温、水温、水pH值、水盐度、水透明度、潮汐高度、淹没期、波速、土壤温度、土壤pH值、孔隙水盐度、沉降、土壤质地颗粒密度、植物高度、生物量和枝条的季节性变化在整个研究过程中注意到不同显着性水平（p < 0.05 至 p < 0.01）的密度。相关矩阵显示，株高、生物量和地上部密度与沉降呈正相关，与波速呈负相关，在不同显着水平（p < 0.05 至 p < 0.01）。减轻气候变化的影响，从长远来看最终将使当地社区免于自然灾害。