The conservation of saproxylic beetles in boreal forest
Forest management has altered the age structure, tree species composition and dead wood availability of Swedish boreal forests. As a consequence, many saproxylic (wood living) insect species have decreased in abundance and many species are threatened. New conservation-oriented forestry uses manageme...
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ftslunivuppsala:oai:pub.epsilon.slu.se:1164 2024-06-09T07:48:37+00:00 The conservation of saproxylic beetles in boreal forest Johansson, Therese 2006-08 application/pdf https://pub.epsilon.slu.se/1164/ https://pub.epsilon.slu.se/1164/1/Kappa_TJ.pdf eng eng https://pub.epsilon.slu.se/1164/1/Kappa_TJ.pdf Johansson, Therese (2006). The conservation of saproxylic beetles in boreal forest. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2006:66 ISBN 91-576-7115-X [Doctoral thesis] Doctoral thesis NonPeerReviewed info:eu-repo/semantics/doctoralThesis 2006 ftslunivuppsala 2024-05-16T04:04:25Z Forest management has altered the age structure, tree species composition and dead wood availability of Swedish boreal forests. As a consequence, many saproxylic (wood living) insect species have decreased in abundance and many species are threatened. New conservation-oriented forestry uses management measures to favour saproxylic species in managed forests. In my thesis, I evaluated the importance of these measures for saproxylic beetles and possible improvements by using a large-scale field experiment at ten sites in northern Sweden. The substrate types used in the experiment included burned and shaded logs, logs inoculated with two species of wood-decaying fungi, untreated control logs, created snags and the tops of the snags. The experiment was performed in three stand types: clear-cuts, mature managed stands and old-growth stands. Additionally, I performed attraction experiments to examine the attraction of saproxylic beetles to sporocarps and mycelia-infected wood of wood-decaying fungi in landscapes with different proportions of old spruce forest. Saproxylic beetles were affected by both forest management and dead wood characteristics. Snags differed from lying untreated logs and tops and supported different assemblages of saproxylic beetles and significantly higher numbers of several bark beetle and predator species. Tops attracted different assemblages from both snags and untreated logs. Burned logs supported a lower abundance of saproxylic beetles, particularly fire-favoured species and cambium consumers (especially Dryocoetes autographus, Hylurgops palliatus, Hylurgops glabratus and Hylastes cunicularius) and different assemblages of fire-favoured beetles, cambium consumers and predators from the untreated logs, probably because burning makes the cambium less suitable as food for bark beetles. However, some species were attracted to the burned logs. Log exposure proved to be important, especially on clear-cuts where shaded logs supported different assemblages of saproxylic beetles, particularly ... Doctoral or Postdoctoral Thesis Northern Sweden Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
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Open Polar |
collection |
Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
op_collection_id |
ftslunivuppsala |
language |
English |
description |
Forest management has altered the age structure, tree species composition and dead wood availability of Swedish boreal forests. As a consequence, many saproxylic (wood living) insect species have decreased in abundance and many species are threatened. New conservation-oriented forestry uses management measures to favour saproxylic species in managed forests. In my thesis, I evaluated the importance of these measures for saproxylic beetles and possible improvements by using a large-scale field experiment at ten sites in northern Sweden. The substrate types used in the experiment included burned and shaded logs, logs inoculated with two species of wood-decaying fungi, untreated control logs, created snags and the tops of the snags. The experiment was performed in three stand types: clear-cuts, mature managed stands and old-growth stands. Additionally, I performed attraction experiments to examine the attraction of saproxylic beetles to sporocarps and mycelia-infected wood of wood-decaying fungi in landscapes with different proportions of old spruce forest. Saproxylic beetles were affected by both forest management and dead wood characteristics. Snags differed from lying untreated logs and tops and supported different assemblages of saproxylic beetles and significantly higher numbers of several bark beetle and predator species. Tops attracted different assemblages from both snags and untreated logs. Burned logs supported a lower abundance of saproxylic beetles, particularly fire-favoured species and cambium consumers (especially Dryocoetes autographus, Hylurgops palliatus, Hylurgops glabratus and Hylastes cunicularius) and different assemblages of fire-favoured beetles, cambium consumers and predators from the untreated logs, probably because burning makes the cambium less suitable as food for bark beetles. However, some species were attracted to the burned logs. Log exposure proved to be important, especially on clear-cuts where shaded logs supported different assemblages of saproxylic beetles, particularly ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Johansson, Therese |
spellingShingle |
Johansson, Therese The conservation of saproxylic beetles in boreal forest |
author_facet |
Johansson, Therese |
author_sort |
Johansson, Therese |
title |
The conservation of saproxylic beetles in boreal forest |
title_short |
The conservation of saproxylic beetles in boreal forest |
title_full |
The conservation of saproxylic beetles in boreal forest |
title_fullStr |
The conservation of saproxylic beetles in boreal forest |
title_full_unstemmed |
The conservation of saproxylic beetles in boreal forest |
title_sort |
conservation of saproxylic beetles in boreal forest |
publishDate |
2006 |
url |
https://pub.epsilon.slu.se/1164/ https://pub.epsilon.slu.se/1164/1/Kappa_TJ.pdf |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
https://pub.epsilon.slu.se/1164/1/Kappa_TJ.pdf Johansson, Therese (2006). The conservation of saproxylic beetles in boreal forest. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2006:66 ISBN 91-576-7115-X [Doctoral thesis] |
_version_ |
1801380410945437696 |