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Título

Interspecific variation in the relationship between clutch size, laying date and intensity of urbanization in four species of hole-nesting birds

AutorVaugoyeau, Marie; Merino, Santiago ; Senar, Juan Carlos
Palabras claveBreeding phenology
Urban heat island effect
Population dynamics
Passerine birds
Orthophotograph
Fecha de publicación25-jul-2016
EditorJohn Wiley & Sons
European Society of Evolutionary Biology
Society for the Study of Evolution
CitaciónEcology and Evolution 6(16): 5907-5920 (2016)
ResumenThe increase in size of human populations in urban and agricultural areas has resulted in considerable habitat conversion globally. Such anthropogenic areas have specific environmental characteristics, which influence the physiology, life history, and population dynamics of plants and animals. For example, the date of bud burst is advanced in urban compared to nearby natural areas. In some birds, breeding success is determined by synchrony between timing of breeding and peak food abundance. Pertinently, caterpillars are an important food source for the nestlings of many bird species, and their abundance is influenced by environmental factors such as temperature and date of bud burst. Higher temperatures and advanced date of bud burst in urban areas could advance peak caterpillar abundance and thus affect breeding phenology of birds. In order to test whether laying date advance and clutch sizes decrease with the intensity of urbanization, we analyzed the timing of breeding and clutch size in relation to intensity of urbanization as a measure of human impact in 199 nest box plots across Europe, North Africa, and the Middle East (i.e., the Western Palearctic) for four species of hole-nesters: blue tits (Cyanistes caeruleus), great tits (Parus major), collared flycatchers (Ficedula albicollis), and pied flycatchers (Ficedula hypoleuca). Meanwhile, we estimated the intensity of urbanization as the density of buildings surrounding study plots measured on orthophotographs. For the four study species, the intensity of urbanization was not correlated with laying date. Clutch size in blue and great tits does not seem affected by the intensity of urbanization, while in collared and pied flycatchers it decreased with increasing intensity of urbanization. This is the first large-scale study showing a species-specific major correlation between intensity of urbanization and the ecology of breeding. The underlying mechanisms for the relationships between life history and urbanization remain to be determined. We propose that effects of food abundance or quality, temperature, noise, pollution, or disturbance by humans may on their own or in combination affect laying date and/or clutch size.
DescripciónMarie Vaugoyeau [et al.]
URIhttp://hdl.handle.net/10261/143626
DOI10.1002/ece3.2335
Identificadoresdoi: 10.1002/ece3.2335
issn: 2045-7758
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