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Heap, Christopher, 2008. Multiple scale habitat selection of the Siberian jay Perisoreus infaustus in a sub arctic managed forest landscape. SLU, Dept. of Wildlife, Fish and Environmental Studies, Umeå. Umeå: SLU, Dept. of Wildlife, Fish and Environmental Studies

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Abstract

Habitat selection studies are important in increasing our understanding of population patterns and processes in fragmented and spatially heterogeneous landscapes. Identification and characterisation of a species' habitat requirements are essential in guiding land-use management practices aimed at the protection of critical habitats. With such knowledge we can understand animal ecology and achieve management practices to conserve species.
Serious declines in the population of Siberian jays Perisoreus infaustus have been observed in recent decades in parts of Fennoscandia. These population declines have been attributed to modern forestry altering habitat from native old spruce to pine plantations and habitat fragmentation.
Through radio-tracking 8 focal birds and habitat surveying I assessed jay habitat selection and elucidated their behavioural choices at multiple-scales during autumn and winter.
Jays strongly preferred forest and avoided wooded bogs and cutovers when moving along trajectories in the homerange. At this scale they preferred intermediate densities of large spruce and pine forest avoiding forest with no spruce or too dense pine. Furthermore, jays avoided young forest preferring older, closed canopy forest with an intermediate level of vertical structure. Small scale observations showed Siberian jays had a distinct preference for food searching in spruce avoiding pine and birch in this respect. Jays also preferred to sit in spruce trees, avoided birch and used pine randomly.
These results suggest that without adequate and well planned management of old growth spruce forest, forestry is likely to result in further declines in Siberian jays in northern Sweden.

Main title:Multiple scale habitat selection of the Siberian jay Perisoreus infaustus in a sub arctic managed forest landscape
Authors:Heap, Christopher
Supervisor:Edenius, Lars
Examiner:UNSPECIFIED
Series:Examensarbete i ämnet biologi / Sveriges lantbruksuniversitet, Institutionen för vilt, fisk och miljö
Volume/Sequential designation:2008:5
Year of Publication:2008
Level and depth descriptor:Other
Student's programme affiliation:SY001 Forest Science - Master's Programme 300 HEC
Department:(S) > Dept. of Wildlife, Fish and Environmental Studies
Keywords:Siberian jay, forestry, activity, telemetry, conservation
URN:NBN:urn:nbn:se:slu:epsilon-s-8613
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-8613
Subjects:SLU > (S) > Dept. of Wildlife, Fish and Environmental Studies
Animal ecology
Language:English
Deposited On:06 Nov 2017 12:29
Metadata Last Modified:06 Nov 2017 12:29

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