| Autor: |
Elena Ramos-Elvira, Eva Banda, Juan Arizaga, David Martín, José I. Aguirre |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Birds, Vol 4, Iss 2, Pp 159-170 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2673-6004 |
| DOI: |
10.3390/birds4020013 |
| Popis: |
Urban areas are constantly increasing, which can cause an effect in bird populations since human activities lead to nature alterations. Populations of House Sparrow (Passer domesticus) and Eurasian Tree Sparrow (Passer montanus) have been decreasing in Spain according to the latest national censuses in Spain. In this study, we tried to assess the population trend over more than two decades using ringing data from Spanish constant effort sites, as well as to determine the population and breeding success proxy in relation to habitat composition at landscape level. We analysed the data and confirmed the decreasing trend in the two species. However, Eurasian Tree Sparrow showed signs of increasing presence in urban areas. Furthermore, the productivity remained stable over sampling sites and years, meaning that the causes of the decreasing populations are affecting both adult and juvenile individuals. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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