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Habitat displacement effect between two competing owl species in fragmented forests

Kajtoch, Łukasz and Zmihorski, Michal and Wieczorek, Paweł (2015). Habitat displacement effect between two competing owl species in fragmented forests. Population ecology. 57:3, 517-527
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Abstract

Many owl species use the same nesting and food resources, which causes strong interspecific competition and spatio-temporal niche separation. We made use of a recent colonisation of Ural Owls (Strix uralensis) in southern Poland to compare habitat preferences of Tawny Owls (Strix aluco) allopatry and sympatry with Ural Owls. We investigated spatial niche segregation of Ural Owl and the Tawny Owl in sympatry and compared habitat preferences of Tawny Owls breeding in allopatry and sympatry. Tawny Owls breeding in sympatry with Ural Owls occupied forests with higher canopy compactness, sites located closer to forest border and to built-up areas, as well as stands with a higher share of fir and spruce and a lower share of beech as compared to sites occupied by Ural Owls. Allopatric Tawny Owls occupied sites with lower canopy compactness and bred at sites located further from forest borders and in stands with lower share of fir and spruce and a higher share of deciduous as compared to sympatric Tawny Owls. As Ural owls are dominant in relation to Tawny Owls, this indicates that the presence of Ural Owls prevents Tawny Owls from occupying deciduous-dominated and old stands located in forest interior areas, far from buildings and forest edges. The results support habitat displacement between the two species when breeding in sympatry. We also show that protection of large forest patches is crucial for the Ural Owl, a species still rare in central Europe, while small patches are occupied by the abundant Tawny Owl.

Authors/Creators:Kajtoch, Łukasz and Zmihorski, Michal and Wieczorek, Paweł
Title:Habitat displacement effect between two competing owl species in fragmented forests
Series/Journal:Population ecology (1438-390X)
Year of publishing :2015
Volume:57
Number:3
Page range:517-527
Number of Pages:11
Publisher:Springer
ISSN:1438-390X
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Habitat fragmentation, Intraguild predation, Spatial segregation, Strix aluco, Strix uralensis, Sympatry, Tawny owls, Ural owls
URN:NBN:urn:nbn:se:slu:epsilon-e-3296
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3296
Additional ID:
Type of IDID
Web of Science (WoS)000360084700007
DOI10.1007/s10144-015-0497-y
ID Code:13079
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:08 Mar 2016 07:17
Metadata Last Modified:08 Mar 2016 07:17

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