Urbanization shapes bird communities and nest survival, but not their food quantity

摘要: Abstract As urbanization accelerates, there is an increasing focus on understanding the ecological aspects of (both direct and indirect impacts communities biodiversity), monitoring qualitative quantitative changes in fauna urbanized areas, examining underlying causes these changes. To explore effect urban areas avian communities, we examined differences species richness abundance birds, survival probabilities artificial shrub nests along gradient (rural – suburban - urban) a medium-sized city Hungary. Additionally, potential food sources (arthropods captured by sticky traps) consumption rates insectivorous birds (predation dummy caterpillars) were compared gradient. Based our observations, diversity that form bird did not change significantly However, more individuals observed than or rural ones, primarily due to dominance synanthropic species: Domestic (Columba livia f. domestica) Wood Pigeon palumbus), House Sparrow (Passer domesticus) European Blackbird (Turdus merula). The daily higher ones. Even so, find any correlations between shrub-nesters urbanization, whilst, they present with habitats. Although arthropods as source was related degree caterpillar predation areas. Nevertheless, no significant insectivores across gradients, but their habitats In conclusion, consistent negative positive could be detected study, high-level seems increase abundance. Our results also suggest shrub-nesting may safer, probably lower pressure and/or favourable nesting sites for nesters cities. availability per se seemed key driver habitat selection studied