Human and Ecological Health Risks of Arctic Marine Perturbation

Indigenous communities maintain a profound connection with their natural environment through traditional subsistence practices such as hunting, fishing, and gathering. These practices not only sustain their nutritional needs but also reinforce their cultural and spiritual identities. However, the intrusion of industrial activities, environmental pollution, and climate change have introduced various contaminants into these ecosystems, thereby posing significant health risks. The pathways through which contaminants infiltrate traditional food sources are complex and multifaceted. These include marine and terrestrial routes, each presenting unique challenges and risks. Marine ecosystems are particularly susceptible to contamination through several mechanisms. Toxic substances such as heavy metals (e.g., mercury) and persistent organic pollutants (POPs) like polychlorinated biphenyls (PCBs) and dioxins accumulate in marine organisms. Higher trophic level species, commonly consumed by indigenous populations, often exhibit elevated contaminant concentrations due to biomagnification. Contaminants deposited in marine sediments can be resuspended by hydrodynamic activities, re-entering the water column and the food web, thereby exposing benthic and pelagic species to higher contaminant loads. Aquatic and terrestrial organisms are contaminated by runoff of pesticides and fertilizers applied in agricultural practices, which resultantly impact the palatability of indigenous diets. Airborne pollutants, including heavy metals and industrial emissions, can settle on land and water surfaces, contaminating soil, water, and subsequently, food sources. The ingestion of contaminated seafood poses numerous health risks. Neurotoxicity is elicited by methylmercury, a highly toxic form of mercury, can cause severe neurological damage, particularly affecting the developing brains of fetuses and young children, leading to cognitive deficits and motor dysfunctions. POPs such as PCBs and dioxins can interfere with hormonal systems, resulting in reproductive and developmental abnormalities, immune system suppression, and other health disorders. Long-term exposure to contaminants like polycyclic aromatic hydrocarbons (PAHs) and certain heavy metals is associated with an increased risk of cancers, including liver, kidney, and lung cancers. To address the health risks posed by contaminant exposure, a comprehensive suite of mitigation and adaptation strategies is imperative. Systematic monitoring of contaminant levels in traditional food sources and environmental matrices is critical. Establishing baseline data and conducting periodic assessments can help in understanding trends and informing risk management strategies. Monitoring the health status of indigenous communities can identify early signs of contaminant exposure and guide timely interventions. Raising awareness about contamination risks and promoting safe harvesting, preparation, and consumption practices can reduce exposure and health risks. Promoting sustainable fishing and hunting practices that reduce exposure to contaminated areas and species can help mitigate risks. Protecting and restoring habitats critical to traditional subsistence practices can enhance ecosystem health and reduce contaminant bioavailability.