Author: Pralay Mahapatra, Dr. Aashi Dixit & Sanjay Kumar
DOI Link: https://doi.org/10.70798/Bijmrd/04030012
Abstract: Nickel (Ni) contamination in riverine ecosystems has emerged as a significant environmental concern due to rapid industrialization, urbanization, and anthropogenic activities. As a heavy metal, nickel persists in aquatic environments and poses serious risks to aquatic organisms, particularly fish, which are highly sensitive to water quality changes. This research article examines the sources, distribution, bioavailability, and ecological consequences of nickel contamination in rivers, with a specific focus on its effects on fish population dynamics. The study synthesizes findings from experimental, field-based, and laboratory research to explore how nickel exposure affects fish physiology, behavior, reproduction, growth, and survival rates. Additionally, it highlights bioaccumulation and biomagnification processes that disrupt aquatic food chains. The article also discusses alterations in species diversity, population structure, and ecosystem stability due to prolonged nickel exposure. Special emphasis is placed on the Indian context, where industrial effluents and agricultural runoff contribute significantly to river pollution. The study concludes by recommending sustainable management strategies, regulatory frameworks, and remediation techniques to mitigate nickel toxicity and preserve aquatic biodiversity.
Keywords: Nickel Contamination, Fish Population Dynamics, Bioaccumulation, Aquatic Toxicity, River Pollution.
Page No: 79-84