Eutrophication, marine biotoxins, human health

Area of Science:

• Marine Biology
• Environmental Science
• Toxicology

Background:

• Eutrophication in marine coastal waters stems from natural or anthropogenic sources.
• Both eutrophication types cause undesirable effects and sanitary issues, varying in significance.
• Marine algal biotoxins pose risks to marine animals and humans through various exposure routes.

Purpose of the Study:

• To review marine biotoxins, their producing organisms, and associated human health risks.
• To examine the chemistry, analysis, and global occurrence of marine toxins.
• To highlight the link between anthropogenic eutrophication and widespread shellfish poisonings like PSP and DSP.

Main Methods:

• Comprehensive literature review of marine biotoxins and eutrophication.
• Analysis of toxin-producing organisms, chemical properties, and toxicological mechanisms.
• Examination of global occurrence, human intoxications, and safety measures.

Main Results:

• Identified four main dinoflagellate intoxications: paralytic shellfish poisoning (PSP), neurotoxic shellfish poisoning (NSP), diarrhoetic shellfish poisoning (DSP), and venerupin poisoning.
• Included amnesic shellfish poisoning (ASP) from diatoms and skin/respiratory effects from blue-green algae.
• Detailed the chemistry, analysis, toxicology, and global impact of various marine biotoxins.

Conclusions:

• Anthropogenic eutrophication exacerbates risks from widespread marine biotoxins, particularly PSP and DSP.
• International bodies are developing health legislation, including tolerance limits and analytical methods.
• Effective control of coastal eutrophication and robust monitoring systems for toxic substances are essential.