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First Evidence of Microplastics' Presence in Surface Water and Fishes of Bhoj Wetland (Ramsar Site).
Summary
Scientists found tiny plastic particles called microplastics in the water and fish of a wetland in India, with higher levels during dry seasons when there's less water to dilute pollution from sewage and tourism. The fish that people commonly eat contained these plastic pieces in their bodies, mostly from broken-down fishing gear and plastic trash. This matters because when we eat contaminated fish, we might also be consuming these microplastics, though more research is needed to understand the full health effects.
In Bhoj Wetland, Bhopal, the presence of microplastics (MPs) in fish and water was investigated in both wet and dry seasons. Microplastic concentrations ranged from 10 ± 4 to 19 ± 4 items L-1 during the dry season and 8 ± 1 to 15 ± 8 items L-1 during the wet season. Among fish species, Wallago attu and tilapia showed average MP loads of 1.2 ± 1.10 and 0.8 ± 1.30 items per individual, respectively. Due to sewage, hospital waste, and tourism, higher MP levels were discovered during the dry season, particularly along Sultania Road (L1) and Masjid Lal Imli (U3). MP presence was quite low in central lake zones. Among the various shapes identified, fibers emerged as the dominant type in both aquatic samples and fish tissues. Wallago attu and tilapia showed the highest MP content, mostly made of polyethylene (PE). The predominance of black and transparent microplastic particles suggests their probable origin from degraded fishing equipment and general plastic litter. Seasonal changes influenced MP levels, with higher amounts in dry months due to less water flow and dilution. The study highlights the impact of human activities and the need for better pollution control.