Publications by authors named "Sheikh Aftab Uddin"
Article Synopsis
- * From December 2019 to January 2020, researchers collected water samples, finding significant variations in dissolved trace elements in the Ganges and Meghna Rivers, while the Brahmaputra River and G-B-M Estuary showed uniformity.
- * Urban areas had higher concentrations of trace elements, and the G-B-M Estuary exhibited changes in iron and lead levels along the salinity gradient, suggesting the need to re-evaluate trace element flux into the oceans, particularly in light of recent reductions in Fe and Pb concentrations. *
Article Synopsis
- - The study focused on nitrogen levels in the lower Ganges-Brahmaputra-Meghna River system, finding that nitrate (NO) was the main type of dissolved inorganic nitrogen (DIN) present, particularly near industrial areas.
- - Ammonium levels rose in the Meghna River due to sewage from local industries, while in the estuary, high nitrification rates caused an increase in nitrate levels despite removal processes.
- - As the water moved toward the coastal ocean, DIN concentrations dropped because of seawater dilution and biological uptake, highlighting the connection between river inputs and the health of marine ecosystems.
Many human activities can greatly influence and alter the health of aquatic ecosystems. In this regard, the quantitative analysis of macroinvertebrates and their relationships with ecological variables is an effective method in environmental monitoring programs. Here, we used the benthic macroinvertebrate community as bioindicators for assessing anthropogenic impacts on coastal waters in southeast Bangladesh.
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- The Karnafullly River in Bangladesh is facing microplastic contamination, with a study analyzing its surface water, sediment, and aquatic species for microplastic presence.
- Concentrations varied significantly among surface water (0.57 to 6.63 items/L), sediment (143.33 to 1240 items/kg), and biota (5.93 to 13.17 items/species), with fibers and small-sized particles being the most common.
- The research suggested that daily, the Bay of Bengal receives about 61.3 million microplastic items, and the estimated annual consumption of these microplastics by individuals in Bangladesh could range from 4015 to 7665 items.
Macroinvertebrate community in the intertidal setup plays an important role in coastal ecosystem functions and biogeochemical cycle. However, different land use pattern may influence on their community structure, diversity, and composition in the coastal ecosystems. Using Van-Veen grab sampler, 60 sediment samples were seasonally collected from mangroves-dominated, aquaculture-dominated, and anthropogenically affected area in the lower intertidal zone of the Kohelia channel of Bangladesh, the Northern Bay of Bengal.
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- This study tested an herbal extract blend of nine different herbs on tiger shrimp, examining its effects on growth, survival, and immunity against a specific bacteria, Vibrio harveyi.
- Shrimp were fed diets with varying concentrations of the herbal extracts for 60 days before being exposed to the bacteria.
- Results showed that the shrimp receiving a 2.5 mL/kg dose of herbal extract had the highest survival rate (76%), growth rate (4.26%), and better food conversion compared to other groups, suggesting improved immune response.