Birds’ ecological characteristics differ among habitats: an analysis based on national citizen science data

Reif, Jiří and Vermouzek, Zdeněk and Voříšek, Petr and Romportl, Dušan and Morelli, Federico (2022) Birds’ ecological characteristics differ among habitats: an analysis based on national citizen science data. COMMUNITY ECOLOGY, 23 (2). pp. 173-186. ISSN 1585-8553 (print); 1588-2756 (online)

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Abstract

Variation in bird community composition across habitats may be reflected by changes in species’ ecological characteristics. By their comparison between habitats, we can learn information about the factors underlying these changes. With this pur- pose, we used data from a nation-wide breeding bird monitoring scheme surveying birds in 15 habitat types sorted into four broad categories (forests, open, urban, and humid habitats) in a central European country, Czechia. We considered life-history strategy, migration distance, climatic niche position, European rarity, and diet niche as species’ ecological characteristics and compared their mean values across the habitat types. Although habitat type explained relatively low proportion of vari- ability in these characteristics indicating that birds widely overlap in their habitat use, we observed significant differences in ecological characteristics between broad habitat categories, as well as between habitat types within a given category. For example, urban habitats hosted species with generally lower degree of insectivory than forest habitats. Within forests, coniferous stands hosted species with colder climatic niche than deciduous stands. The greatest differences were observed among humid habitat types: species recorded in water bodies were rarer in Europe and had slower life-history strategies than species recoded in running water. Within the open habitat category, mining areas were the most specific habitat with long-migrating and warm-dwelling species. The observed patterns can be driven by various factors including habitat-specific selection pressures, biogeographic constraints and human-induced habitat changes. On their basis, we discuss our findings.

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