Heavy Metal Concentrations and Spatial Variation in Fish, Water, and Sediments of River Niger: A Comparative Analysis

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Significant site-specific variations in heavy metal concentrations were identified across fish, water, and sediments.
Highest iron levels in fish tissue were recorded at Otuocha, reaching 47.12 mg/kg, indicating substantial bioaccumulation.
Cobalt, manganese, and silver showed distinct distribution patterns, with contrasting concentrations at different sites along the river.
The study highlights urgent needs for pollution control and monitoring to protect aquatic biodiversity and public health.

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This analysis reveals spatial variation in heavy metals cobalt, manganese, iron, and silver in River Niger, indicating ecological risks.

Ujah et al. (2025) studied this question.

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