Habitat requirements of saproxylic beetles on aspen
In Fennoscandia, most of the forests have been under production management since the 19th or 20th century, which has resulted in decreasing amounts of dead wood (coarse woody debris, cwd). Populations of many saproxylic (wood–dependent)species have declined because of the reduction of cwd. Forestry...
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ftslunivuppsala:oai:pub.epsilon.slu.se:2068 2024-06-09T07:45:54+00:00 Habitat requirements of saproxylic beetles on aspen Sahlin, Erik 2009 application/pdf https://pub.epsilon.slu.se/2068/ https://pub.epsilon.slu.se/2068/1/sahlin_e_090819.pdf eng eng https://pub.epsilon.slu.se/2068/1/sahlin_e_090819.pdf Sahlin, Erik (2009). Habitat requirements of saproxylic beetles on aspen. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2009:48 ISBN 978-91-86195-95-3 [Doctoral thesis] Not in use please see Agris categories Doctoral thesis NonPeerReviewed 2009 ftslunivuppsala 2024-05-16T04:04:25Z In Fennoscandia, most of the forests have been under production management since the 19th or 20th century, which has resulted in decreasing amounts of dead wood (coarse woody debris, cwd). Populations of many saproxylic (wood–dependent)species have declined because of the reduction of cwd. Forestry is currently trying to increase cwd amounts on clearcuts by green–tree retention. As a result of increased mortality of retained trees this can be expected to enhance cwd amounts on clearcuts. This thesis evaluates whether this practice increases diversity of saproxylic beetles inhabiting aspen. One study compares the habitat availability of aspen–associated beetles (beetles preferring aspen cwd over cwd from other tree species) in clearcuts and forests. A second study focuses on how occupancy (proportion of occupied habitat patches) and density of aspen–associated beetles is influenced by habitat patch size and habitat connectivity. A third study evaluates the contribution aspen cwd on clearcuts makes to total beetle diversity. The results demonstrate that retention of living aspen at clearcutting favours aspen–associated species. Increased tree mortality of retained trees generates more cwd on clearcuts compared with in forests. Thus, a significant part of the beetle populations can be expected to occur on clearcuts. The spatial distribution of the cwd influenced beetle occurrence. Both occupancy and density of aspen–associated beetles was generally higher in larger than in smaller habitat patches. Thus, priority should be given to retain large patches of living and dead aspen. A majority (93 %) of the saproxylic beetle species recorded from aspen cwd in this study was not aspen–associated, i.e. they prefer other tree species than aspen. Also when considering all of these species, clearcuts provide a valuable contribution for maintaining the biodiversity in managed forest landscapes. Species richness was as high in clearcut as in forest sites. In addition, species composition differed between the two stand types ... Doctoral or Postdoctoral Thesis Fennoscandia Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
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Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
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English |
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Not in use please see Agris categories |
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Not in use please see Agris categories Sahlin, Erik Habitat requirements of saproxylic beetles on aspen |
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Not in use please see Agris categories |
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In Fennoscandia, most of the forests have been under production management since the 19th or 20th century, which has resulted in decreasing amounts of dead wood (coarse woody debris, cwd). Populations of many saproxylic (wood–dependent)species have declined because of the reduction of cwd. Forestry is currently trying to increase cwd amounts on clearcuts by green–tree retention. As a result of increased mortality of retained trees this can be expected to enhance cwd amounts on clearcuts. This thesis evaluates whether this practice increases diversity of saproxylic beetles inhabiting aspen. One study compares the habitat availability of aspen–associated beetles (beetles preferring aspen cwd over cwd from other tree species) in clearcuts and forests. A second study focuses on how occupancy (proportion of occupied habitat patches) and density of aspen–associated beetles is influenced by habitat patch size and habitat connectivity. A third study evaluates the contribution aspen cwd on clearcuts makes to total beetle diversity. The results demonstrate that retention of living aspen at clearcutting favours aspen–associated species. Increased tree mortality of retained trees generates more cwd on clearcuts compared with in forests. Thus, a significant part of the beetle populations can be expected to occur on clearcuts. The spatial distribution of the cwd influenced beetle occurrence. Both occupancy and density of aspen–associated beetles was generally higher in larger than in smaller habitat patches. Thus, priority should be given to retain large patches of living and dead aspen. A majority (93 %) of the saproxylic beetle species recorded from aspen cwd in this study was not aspen–associated, i.e. they prefer other tree species than aspen. Also when considering all of these species, clearcuts provide a valuable contribution for maintaining the biodiversity in managed forest landscapes. Species richness was as high in clearcut as in forest sites. In addition, species composition differed between the two stand types ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Sahlin, Erik |
author_facet |
Sahlin, Erik |
author_sort |
Sahlin, Erik |
title |
Habitat requirements of saproxylic beetles on aspen |
title_short |
Habitat requirements of saproxylic beetles on aspen |
title_full |
Habitat requirements of saproxylic beetles on aspen |
title_fullStr |
Habitat requirements of saproxylic beetles on aspen |
title_full_unstemmed |
Habitat requirements of saproxylic beetles on aspen |
title_sort |
habitat requirements of saproxylic beetles on aspen |
publishDate |
2009 |
url |
https://pub.epsilon.slu.se/2068/ https://pub.epsilon.slu.se/2068/1/sahlin_e_090819.pdf |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_relation |
https://pub.epsilon.slu.se/2068/1/sahlin_e_090819.pdf Sahlin, Erik (2009). Habitat requirements of saproxylic beetles on aspen. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 2009:48 ISBN 978-91-86195-95-3 [Doctoral thesis] |
_version_ |
1801375556356276224 |