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Humans shape distribution and habitat use of an opportunistic scavenger

Research focused on evaluating how human food subsidies influence the foraging ecology of scavenger species is scarce but essential for elucidating their role in shaping behavioral patterns, population dynamics, and potential impacts on ecosystems. This study evaluates the potential role of humans in shaping the year?round distribution and habitat use of individuals from a typical scavenger species, the yellow?legged gull (Larus michahellis), breeding at southwestern Spain. To do this, long?term, nearly continuous GPS?tracking data were combined with spatially explicit information on habitat types and distribution of human facilities, as proxied by satellite imagery of artificial night lights. Overall, individuals were mainly associated with freshwater habitats, followed by the marine?related systems, human?related habitats, and terrestrial systems. However, these relative contributions to the overall habitat usage largely changed throughout the annual cycle as a likely response to ecological/physiological constraints imposed by varying energy budgets and environmental constraints resulting from fluctuations in the availability of food resources. Moreover, the tight overlap between the year?round spatial distribution of gulls and that of human facilities suggested that the different resources individuals relied on were likely of anthropogenic origin. This evidence supports the high dependence of this species on human?related food resources throughout the annual cycle. Owing to the ability of individuals to disperse and reach transboundary areas of Spain, Portugal, or Morocco, international joint efforts aimed at restricting the availability of human food resources would be required to manage this overabundant species and the associated consequences for biodiversity conservation (e.g., competitive exclusion of co?occurring species) and human interests (e.g., airports or disease transmission). informacion[at]ebd.csic.es: Ramírez et al (2020) Humans shape the year?round distribution and habitat use of an opportunistic scavenger. Ecol Evol https://doi.org/10.1002/ece3.6226


https://onlinelibrary.wiley.com/doi/full/10.1002/ece3.6226
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Content with tag avian scavengers .

Humans shape distribution and habitat use of an opportunistic scavenger

Research focused on evaluating how human food subsidies influence the foraging ecology of scavenger species is scarce but essential for elucidating their role in shaping behavioral patterns,...

The use of roads in protected areas and its effects on avian scavenger guild

The expansion of road networks and the increase in traffic have emerged in recent years as key threats to the conservation of biodiversity. This is particularly concerning in many protected areas...

Survival and breeding success in Egyptian vulture

In long-lived species, the age-, stage- and/or sex-dependent patterns of survival and reproduction determine the evolution of life history strategies, the shape of the reproductive value, and...

Feathered Detectives: Real-Time GPS Tracking of Scavenging Gulls Pinpoints Illegal Waste Dumping

Urban waste impacts human and environmental health, and waste management has become one of the major challenges of humanity. Concurrently with new directives due to manage this human by-product,...
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