Polycyclic aromatic hydrocarbons (PAHs) in seabird eggs in Ireland

Area of Science:

• Environmental Chemistry
• Marine Ecology
• Avian Toxicology

Background:

• Seabird eggs serve as effective biomonitors for marine pollution.
• Higher trophic level indicators are crucial for assessing ecosystem health.
• Polycyclic Aromatic Hydrocarbons (PAHs) are persistent organic pollutants of concern.

Purpose of the Study:

• To quantify Polycyclic Aromatic Hydrocarbons (PAHs) in the eggs of four piscivorous seabird species in Ireland.
• To establish baseline PAH concentrations for common guillemot, northern gannet, common tern, and arctic tern.
• To compare PAH levels with existing data from other seabird studies and domestic avian species.

Main Methods:

• Analysis of Polycyclic Aromatic Hydrocarbons (PAHs) using established chemical methods.
• Sampling of eggs from multiple colonies across Ireland.
• Identification and quantification of Σ15PAH concentrations.

Main Results:

• PAH concentrations in seabird eggs were generally lower than those reported in other international studies.
• Detected PAH levels were significantly below concentrations known to cause adverse effects in domestic avian species.
• Potential variations in PAH concentrations were observed between different sites and seabird species.

Conclusions:

• The study provides essential baseline data on PAHs in Irish seabird populations.
• These findings are vital for future monitoring and risk assessment in case of marine pollution events, such as oil spills.
• Seabird eggs are confirmed as valuable indicators for marine environmental quality.