Does the Magpie Pica pica (L.) prefer poplars as a nesting tree in the urban environment?

• Autorzy: Meissner W. , Żółkoś K.
• Języki publikacji: EN

Abstrakty

EN

This paper aims to verify the hypothesis that magpies in urban environments favour poplars as nesting trees, as suggested by previous authors. The fieldwork was conducted in a 180 ha area in a district of Gdańsk (North Poland). The study area held 5294 trees and high shrubs, where 124 magpie nests were found in 10 species of trees. Results of log-linear analysis showed that the magpies chose particular tree species rather than types of spatial tree organization. The lombardy poplar (Populus nigra "Italica") is the species most frequently chosen as a nest tree, however - the magpies showed a significant preference for trees growing separately or in pairs. The choice index (the ratio of expected to observed frequency) confirmed the magpies. strong preference for black poplar cultivars and for birches, regardless of the trees. grouping. The magpies preferred lombardy poplar when they had the choice of two poplar cultivars. This cultivar has a crown suitable for the magpie's nest construction because of the small angle between the trunk and the branches. The thin, almost vertical branches probably also limit predators from penetrating the crown because these branches do not provide much support for tree climbers. The large-scale planting of lombardy poplars in Polish towns in the 1960s and 1970s has probably contributed to the significant increase of the magpie population in the urban environment.

Słowa kluczowe

EN

nesting tree; spatial tree organization; synantropization; urban avifauna

PL

gnieżdżenie się na drzewach; miejska awifauna; organizacja przestrzenna drzew; synantropizacja

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2010
• Tom: Vol. 58, nr 2
• Strony: 371--377
• Opis fizyczny: Bibliogr. 34 poz.,

Twórcy

autor

Meissner W.

autor

Żółkoś K.

• Avian Ecophysiology Unit, Department of Vertebrate Ecology & Zoology University of Gdańsk, Al. Legionów 9, PL 80-441 Gdańsk, Poland,

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