BACKGROUND: Wetlands have been some of the most destroyed ecosystems over the last century, with important land-use changes resulting from agricultural, industrial, and urban development. Gediz Delta is a large wetland on the Aegean coast of Western Türkiye with natural areas affected by conversion to agriculture and urban developments from the Izmir metropolis. We assessed the effects of landscape type (natural, agricultural, and urban) on the composition of breeding bird (90 species) and reptile (14 species) communities in the Gediz Delta between 2019 and 2021. We used generalized linear models to estimate the effect of landscape types on community indexes and joint species distribution models to assess how species-specific habitat preferences explained their responses to landscape type. RESULTS: Our results show that bird and reptile community compositions were impacted differently depending on landscape type. Landscape type significantly affected bird abundance and Shannon equality indices but had no significant effect on bird and reptile species richness. Natural landscapes accommodated higher bird abundance and lower diversity indexes than the other two landscapes. On the other hand, we found that urban and agricultural landscapes accommodated more generalist species than natural ones. Natural landscapes were preferred by Marine & Coastal and Inland wetland bird specialists and reptiles relying on Mediterranean Habitats. Overall, these results suggest that community composition encountered in different landscape types is explained by species' habitat specializations. CONCLUSIONS: We highlight the critical importance of natural landscapes for conserving specialist species within the Delta while showing the potential of agricultural areas for a few freshwater reptile species. These results imply that the Gediz Delta would benefit from biodiversity conservation planning to enhance the protection of natural habitats and mitigate the negative impacts of agricultural and urban development on bird and reptile populations.

• Klíčová slova
• Community assemblages, Community structure, HMSC, Joint species distribution modeling, Reptiles and birds,
• MeSH
• biodiverzita * MeSH
• ekosystém MeSH
• mokřady * MeSH
• plazi * fyziologie   MeSH
• ptáci * fyziologie   MeSH
• urbanizace * MeSH
• zemědělství * MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Turecko MeSH

Declines in European bird populations are reported for decades but the direct effect of major anthropogenic pressures on such declines remains unquantified. Causal relationships between pressures and bird population responses are difficult to identify as pressures interact at different spatial scales and responses vary among species. Here, we uncover direct relationships between population time-series of 170 common bird species, monitored at more than 20,000 sites in 28 European countries, over 37 y, and four widespread anthropogenic pressures: agricultural intensification, change in forest cover, urbanisation and temperature change over the last decades. We quantify the influence of each pressure on population time-series and its importance relative to other pressures, and we identify traits of most affected species. We find that agricultural intensification, in particular pesticides and fertiliser use, is the main pressure for most bird population declines, especially for invertebrate feeders. Responses to changes in forest cover, urbanisation and temperature are more species-specific. Specifically, forest cover is associated with a positive effect and growing urbanisation with a negative effect on population dynamics, while temperature change has an effect on the dynamics of a large number of bird populations, the magnitude and direction of which depend on species' thermal preferences. Our results not only confirm the pervasive and strong effects of anthropogenic pressures on common breeding birds, but quantify the relative strength of these effects stressing the urgent need for transformative changes in the way of inhabiting the world in European countries, if bird populations shall have a chance of recovering.

• Klíčová slova
• agriculture intensification, anthropogenic pressures, bird conservation, large-scale analysis,
• MeSH
• biodiverzita MeSH
• ekosystém MeSH
• farmy MeSH
• lesy * MeSH
• populační dynamika MeSH
• ptáci fyziologie   MeSH
• zachování přírodních zdrojů MeSH
• zemědělství * MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Geografické názvy
• Evropa MeSH