Physiological impact of air quality in urban gulls and its implications for their use as pollution sentinels in coastal cities
Por:
Oliveira, CF, Solé, M, Martín-Vélez, V, Rico, M, Montalvo, T, Navarro, J
Publicada:
5 dic 2025
Ahead of Print:
1 nov 2025
Resumen:
Urban air pollutants pose significant threats to both wildlife and humans due to their persistence and potential for bioaccumulation. Sentinel species such as the yellow-legged gull (Larus michahellis) are valuable to assess environmental contamination. Due to their stationary nesting behaviour and continuous exposure to local air conditions, gull chicks are particularly valuable as early warning sentinels for urban air quality. In this study, we assessed the impact of airborne pollutants (PM2.5, PM10 and NO2) on detoxification and oxidative stress biomarkers in 56 yellow-legged gull chicks in the overpopulated city of Barcelona, Spain. We analysed five biomarkers - cholinesterases (AChE, BChE), carboxylesterases (pNPA-CE, pNPB-CE), and glutathione S-transferase (GST) - in relation to the cumulative PM2.5, PM10, and NO2 levels during the entire life of each gull chick. After accounting for individual variation in size, developmental stage, and trophic ecology (via stable isotope analysis), we found significant associations between air pollution and enzyme activity. Specifically, BChE and pNPBCE activities were positively associated with PM10 levels, while GST activity showed a positive correlation with NO2 concentrations and a negative one with chick body weight. Our findings suggest that incorporating enzymatic biomarkers such as BChE, CE, and GST into physiological biomonitoring programs offers a practical and sensitive approach for evaluating the impact of urban air pollution, supporting integrated environmental and public health efforts within the One Health framework.
Filiaciones:
Oliveira, CF:
Inst Ciencies Mar, CSIC, Passeig Maritim Barceloneta 37-49, Barcelona 08003, Spain
Solé, M:
Inst Ciencies Mar, CSIC, Passeig Maritim Barceloneta 37-49, Barcelona 08003, Spain
Martín-Vélez, V:
Inst Ciencies Mar, CSIC, Passeig Maritim Barceloneta 37-49, Barcelona 08003, Spain
Rico, M:
Agencia Salut Publ Barcelona, Pl Lesseps 1, Barcelona 08023, Spain
Montalvo, T:
Agencia Salut Publ Barcelona, Pl Lesseps 1, Barcelona 08023, Spain
Navarro, J:
Inst Ciencies Mar, CSIC, Passeig Maritim Barceloneta 37-49, Barcelona 08003, Spain
Green Accepted, hybrid
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