Bioaccumulation of Heavy Metals Across Aquatic Trophic Levels in Badrai Stream, in Buner Swabi Districts, Khyber Pakhtunkhwa, Pakistan
DOI:
https://doi.org/10.57038/usjas.v9i02.7590Keywords:
bioaccumulation, Heavy metals, Water, Sediments, Badri StreamAbstract
The present study investigates the bioaccumulation of selected heavy metals across different trophic levels in the Badrai Stream ecosystem in District Buner and Swabi, ranging from sediments to top-level carnivorous fish, to assess potential risks to human health. Heavy metals such as cadmium (Cd), nickel (Ni), copper (Cu), lead (Pb), and zinc (Zn) were detected in commonly consumed fish species including Coptodon zillii, Channa punctatus, Labeo rohita, and Cyprinus carpio, collected from various locations: Totalai, Ghurghusto, Qasim Khel, and Dandar in District Buner and Pak Kaya, Punjpir, Swabi, Islam Khan in District Swabi. The presence of these metals at concerning levels in edible fish tissues indicates a potential health hazard to local consumers. Spatial analysis of contamination levels in water and sediments followed the order: Pak Kaya > Punjpir > Swabi > Islam Khan > Totalai > Ghurghusto > Qasim Khel > Dandar. The concentrations of heavy metals in fish muscle tissues varied among species, with no consistent accumulation trend observed.
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