Habitat preferences of two sparrow species are modified by abundances of other birds in an urban environment
| Autor: | Przemysław Wylegała, Zuzanna M. Rosin, Viktoria Takacs, Joanna Suchodolska, Przemysław Szwajkowski, Adam Kasprzak, Andżelika Haidt, Agata J. Krawczyk, Anna W. Malecha, Łukasz Myczko, Katarzyna Sierpowska, Agnieszka Graclik, Oskar Wasielewski, Łukasz Jankowiak, Zbigniew Kwieciński, Anna Ekner-Grzyb, Tadeusz Mizera, Piotr Tryjanowski, Piotr Skórka |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Sparrow landscape ecology urban ecosystems biology Ecology 010604 marine biology & hydrobiology media_common.quotation_subject Niche differentiation Articles biology.organism_classification 010603 evolutionary biology 01 natural sciences spatial autocorrelation Competition (biology) Habitat Abundance (ecology) biology.animal public information Animal Science and Zoology Landscape ecology Relative species abundance Passer media_common |
| Zdroj: | Current Zoology |
| ISSN: | 2396-9814 1674-5507 |
| Popis: | Every species has certain habitat requirements, which may be altered by interactions with other co-occurring species. These interactions are mostly ignored in predictive models trying to identify key habitat variables correlated with species population abundance/occurrence. We investigated how the structure of the urban landscape, food resources, potential competitors, predators, and interaction between these factors influence the abundance of house sparrow Passer domesticus and the tree sparrow P. montanus in sixty 25 ha plots distributed randomly across residential areas of the city of Poznań (Poland). The abundance of the house sparrow was positively correlated with the abundance of pigeons but negatively correlated with human-related food resources. There were significant interaction terms between abundances of other urban species and habitat variables in statistical models. For example, the abundance of house sparrow was negatively correlated with the abundance of corvids and tree sparrows but only when food resources were low. The abundance of tree sparrows positively correlated with density of streets and the distance from the city center. The abundance of this species positively correlated with the abundance of corvids when food resources were low but negatively correlated at low covers of green area. Our study indicates that associations between food resources, habitat covers, and the relative abundance of two sparrow species are altered by the abundance of other urban species. Competition, niche separation and social facilitation may be responsible for these interactive effects. Thus, biotic interactions should be included not only as an additive effect but also as an interaction term between abundance and habitat variables in statistical models predicting species abundance and occurrence. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|