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Perspective Chapter: Exploring the Toxicity Effect of Heavy Metals on Aquatic Organisms – A Comprehensive Analysis
Summary
This chapter provides a comprehensive overview of how heavy metals from both natural sources and human activities accumulate in aquatic ecosystems and harm organisms. Researchers describe how these metals cause oxidative stress, enzyme inhibition, DNA damage, and reproductive problems in fish and other aquatic species. The study highlights the importance of understanding these toxic pathways to better protect water ecosystems and human health.
Heavy metals are naturally occurring elements with high atomic weight and density, and they are toxic to aquatic species even at low concentrations. They enter aquatic ecosystems through natural processes like rock weathering and volcanic eruptions, as well as human activities such as industrial processes and the use of fertilizers. Due to their non-biodegradable nature, heavy metals accumulate in the environment, affecting their reactivity, bioavailability, and toxicity. These metals can cause oxidative stress, enzyme inhibition, and DNA damage in aquatic organisms, leading to bioaccumulation, histopathological changes, reproductive toxicity, and behavioral alterations. This chapter explores heavy metals’ sources, pathways, and toxicological effects in aquatic ecosystems, aiming to understand their ecological and health impacts.