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Grünwald, Jan; Auniņš, Ainārs; Brambilla, Mattia; Escandell, Virginia; Eskildsen, Daniel Palm; Chodkiewicz, Tomasz; Fontaine, Benoît; Jiguet, Frédéric; Kålås, John Atle; Kamp, Johannes; Klvaňová, Alena; Kuczyński, Lechosław; Lehikoinen, Aleksi; Lindström, Åke; Nellis, Renno; Jostein Øien, Ingar; Šilarová, Eva; Strebel, Nicolas; Vikstrøm, Thomas; Voříšek, Petr; Reif, Jiří
Ecological indicators, 03/2024, Letnik: 160Journal Article
•Birds’ performance in urban environments can be linked to time when they urbanized.•Earlier urbanized birds have more negative long-term population trends.•Rapid environmental changes in cities can explain these negative trends.•Population trends of urban birds also covary with their habitat niche and nest site.•More positive trends in species breeding in more open areas and closer to ground. The population dynamics of urban animals has been so far remarkably understudied. At the same time, urban species’ population trends can provide important information on the consequences of environmental changes in cities. We modelled long-term population trends of 93 bird species breeding in urban areas in 16 European countries as a function of species’ traits, characterising variability in their urbanization and ecology. We found that: (i) earlier colonisers have more negative population trends than recent colonisers; (ii) more urbanized open habitat species had more positive population trends than less urbanized open habitat species; (iii) highly urbanized birds breeding above the ground had more negative trends than highly urbanized ground breeders. These patterns can be explained by several processes occurring in cities as well as outside city borders. Namely, (i) pre-industrial colonisers might struggle to persist in rapidly changing urban areas, limiting their foraging and breeding opportunities of the birds. (ii) Open habitats are under pressure of intensive agricultural exploitation in rural areas, which may negatively affect populations of less urbanized birds. In contrast, urban areas do not experience such pressure keeping the trends of urbanized open habitat species more positive. (iii) Differences in population trends between highly urbanized ground and above-ground breeders suggest that the latter may lose their breeding opportunities in modern buildings that do not provide suitable breeding sites. Our results indicate that even once successful, city dwellers may not keep pace with changes in urban areas, but these areas may also provide suitable habitats for biodiversity.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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