Survival of male Tengmalm’s owls increases with cover of old forest in the territory
The loss and fragmentation of forest habitats have been considered to pose a worldwide threat to the viability of forest-dwelling animals, especially to species that occupy old forests. We investigated whether the annual survival of sedentary male Tengmalm’s owls Aegolius funereus was associated wit...
Published in: | Oecologia |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2008
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Online Access: | https://pure.knaw.nl/portal/en/publications/ab7b13db-9739-4613-855f-95ef9776d2ef https://doi.org/10.1007/s00442-007-0929-2 https://hdl.handle.net/20.500.11755/ab7b13db-9739-4613-855f-95ef9776d2ef |
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ftknawnlpublic:oai:pure.knaw.nl:publications/ab7b13db-9739-4613-855f-95ef9776d2ef 2024-09-15T17:34:37+00:00 Survival of male Tengmalm’s owls increases with cover of old forest in the territory Hakkarainen, H. Korpimäki, E. Laaksonen, T. Nikula, A. Suorsa, P. 2008 https://pure.knaw.nl/portal/en/publications/ab7b13db-9739-4613-855f-95ef9776d2ef https://doi.org/10.1007/s00442-007-0929-2 https://hdl.handle.net/20.500.11755/ab7b13db-9739-4613-855f-95ef9776d2ef eng eng https://pure.knaw.nl/portal/en/publications/ab7b13db-9739-4613-855f-95ef9776d2ef info:eu-repo/semantics/closedAccess Hakkarainen , H , Korpimäki , E , Laaksonen , T , Nikula , A & Suorsa , P 2008 , ' Survival of male Tengmalm’s owls increases with cover of old forest in the territory ' , Oecologia , vol. 155 , no. 3 , pp. 479-486 . https://doi.org/10.1007/s00442-007-0929-2 article 2008 ftknawnlpublic https://doi.org/10.1007/s00442-007-0929-220.500.11755/ab7b13db-9739-4613-855f-95ef9776d2ef 2024-07-22T23:43:54Z The loss and fragmentation of forest habitats have been considered to pose a worldwide threat to the viability of forest-dwelling animals, especially to species that occupy old forests. We investigated whether the annual survival of sedentary male Tengmalm’s owls Aegolius funereus was associated with the cover of old coniferous forests in Finland. Survival and recapture probabilities varied annually with density changes in populations of the main prey (Microtus voles). When this variation was controlled for, and relationships between survival and proportions of the three different forest age classes (old-growth, middle-aged, and young) were modeled separately, the old-growth model was the most parsimonious. Survival increased with the cover of old forest, although the extent of old forest within owl territories was relatively small (mean ∼12%, range 2–37%). This association, however, varied among years and appeared especially in years of increasing vole abundance. At such times, old forests may sustain high populations of bank voles Clethrionomys glareolus, shrews and small passerines. In addition, old forests may serve as refuges against large avian predator species, such as Ural owls Strix uralensis and goshawks Accipiter gentilis. Our results suggest that changes in habitat quality created by agriculture and forestry may have the potential to reduce adult survival, an essential component of fitness and population viability. The loss and fragmentation of forest habitats have been considered to pose a worldwide threat to the viability of forest-dwelling animals, especially to species that occupy old forests. We investigated whether the annual survival of sedentary male Tengmalm’s owls Aegolius funereus was associated with the cover of old coniferous forests in Finland. Survival and recapture probabilities varied annually with density changes in populations of the main prey (Microtus voles). When this variation was controlled for, and relationships between survival and proportions of the three different forest ... Article in Journal/Newspaper Accipiter gentilis Strix uralensis Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) Oecologia 155 3 479 486 |
institution |
Open Polar |
collection |
Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) |
op_collection_id |
ftknawnlpublic |
language |
English |
description |
The loss and fragmentation of forest habitats have been considered to pose a worldwide threat to the viability of forest-dwelling animals, especially to species that occupy old forests. We investigated whether the annual survival of sedentary male Tengmalm’s owls Aegolius funereus was associated with the cover of old coniferous forests in Finland. Survival and recapture probabilities varied annually with density changes in populations of the main prey (Microtus voles). When this variation was controlled for, and relationships between survival and proportions of the three different forest age classes (old-growth, middle-aged, and young) were modeled separately, the old-growth model was the most parsimonious. Survival increased with the cover of old forest, although the extent of old forest within owl territories was relatively small (mean ∼12%, range 2–37%). This association, however, varied among years and appeared especially in years of increasing vole abundance. At such times, old forests may sustain high populations of bank voles Clethrionomys glareolus, shrews and small passerines. In addition, old forests may serve as refuges against large avian predator species, such as Ural owls Strix uralensis and goshawks Accipiter gentilis. Our results suggest that changes in habitat quality created by agriculture and forestry may have the potential to reduce adult survival, an essential component of fitness and population viability. The loss and fragmentation of forest habitats have been considered to pose a worldwide threat to the viability of forest-dwelling animals, especially to species that occupy old forests. We investigated whether the annual survival of sedentary male Tengmalm’s owls Aegolius funereus was associated with the cover of old coniferous forests in Finland. Survival and recapture probabilities varied annually with density changes in populations of the main prey (Microtus voles). When this variation was controlled for, and relationships between survival and proportions of the three different forest ... |
format |
Article in Journal/Newspaper |
author |
Hakkarainen, H. Korpimäki, E. Laaksonen, T. Nikula, A. Suorsa, P. |
spellingShingle |
Hakkarainen, H. Korpimäki, E. Laaksonen, T. Nikula, A. Suorsa, P. Survival of male Tengmalm’s owls increases with cover of old forest in the territory |
author_facet |
Hakkarainen, H. Korpimäki, E. Laaksonen, T. Nikula, A. Suorsa, P. |
author_sort |
Hakkarainen, H. |
title |
Survival of male Tengmalm’s owls increases with cover of old forest in the territory |
title_short |
Survival of male Tengmalm’s owls increases with cover of old forest in the territory |
title_full |
Survival of male Tengmalm’s owls increases with cover of old forest in the territory |
title_fullStr |
Survival of male Tengmalm’s owls increases with cover of old forest in the territory |
title_full_unstemmed |
Survival of male Tengmalm’s owls increases with cover of old forest in the territory |
title_sort |
survival of male tengmalm’s owls increases with cover of old forest in the territory |
publishDate |
2008 |
url |
https://pure.knaw.nl/portal/en/publications/ab7b13db-9739-4613-855f-95ef9776d2ef https://doi.org/10.1007/s00442-007-0929-2 https://hdl.handle.net/20.500.11755/ab7b13db-9739-4613-855f-95ef9776d2ef |
genre |
Accipiter gentilis Strix uralensis |
genre_facet |
Accipiter gentilis Strix uralensis |
op_source |
Hakkarainen , H , Korpimäki , E , Laaksonen , T , Nikula , A & Suorsa , P 2008 , ' Survival of male Tengmalm’s owls increases with cover of old forest in the territory ' , Oecologia , vol. 155 , no. 3 , pp. 479-486 . https://doi.org/10.1007/s00442-007-0929-2 |
op_relation |
https://pure.knaw.nl/portal/en/publications/ab7b13db-9739-4613-855f-95ef9776d2ef |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s00442-007-0929-220.500.11755/ab7b13db-9739-4613-855f-95ef9776d2ef |
container_title |
Oecologia |
container_volume |
155 |
container_issue |
3 |
container_start_page |
479 |
op_container_end_page |
486 |
_version_ |
1810493490178555904 |