Model projections reveal a recent decrease in a yellow‑legged gull population after landfill closure / 
Sergio Delgado, Giacomo Tavecchia, Alfredo Herrero, Asier Aldalur, Juan Arizaga. 
 -- [S.l.] :   Springer Verlag,   2023. 
<br/><br/> Restringido 
<br/><br/> The food available in open-air landfills, one of the most common predictable anthropogenic food subsidies (PAFS), can have a profound impact on animal biodiversity. Understanding how and to what extent PAFS affect wildlife is crucial for a sustainable management of resources. Most large gulls behave as opportunistic foragers and constitute a good avian model<br/>to analyze the effect of PAFS reduction on animal populations. Using individual data from a yellow-legged gull population<br/>of the Basque coast (northern Iberia) collected over a 15-year period, we estimated survival and reproductive parameters<br/>and used them to parameterize an age-structured population model to explore the effects of the local landfill closure. Local<br/>survival probability declined with time as a consequence of the progressive closure of the local landfill sites. The top-ranked<br/>models included a quadratic function of time, suggesting an acceleration of mortality during the later years, especially in<br/>juveniles, while survival in adults was linear. An effect more pronounced in first year birds than in older birds. Population<br/>models predict a decrease of the population and confirmed a greater sensitivity of the population growth rate to adult survival<br/>probability. Overall, our results suggest that the reduced carrying capacity of the system resulted after landfill closures have<br/>caused a population decline which is expected to continue in the near future. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Demography <br/>Breeding output<br/>Food subsidies<br/>Population dynamics<br/>Landfill<br/>Seabirds<br/>Survival
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Artículo científico