Do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks?
Outbreaks of defoliating insects periodically cause mass mortality of trees, thereby generating pulses of dead wood resources for saproxylic (i.e. dead-wood dependent) organisms. This study investigated the responses of saproxylic beetles to a dead wood resource pulse caused by recent (2001-2009) ou...
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Universitetet i Tromsø
2012
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Online Access: | https://hdl.handle.net/10037/5129 |
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ftunivtroemsoe:oai:munin.uit.no:10037/5129 2023-05-15T17:43:36+02:00 Do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks? Schultze, Sabrina 2012-05 https://hdl.handle.net/10037/5129 eng eng Universitetet i Tromsø University of Tromsø https://hdl.handle.net/10037/5129 URN:NBN:no-uit_munin_4841 openAccess Copyright 2012 The Author(s) VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 Coleoptera saproxylic dead wood resource pulse numerical response VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 BIO-3910 Master thesis Mastergradsoppgave 2012 ftunivtroemsoe 2021-06-25T17:53:34Z Outbreaks of defoliating insects periodically cause mass mortality of trees, thereby generating pulses of dead wood resources for saproxylic (i.e. dead-wood dependent) organisms. This study investigated the responses of saproxylic beetles to a dead wood resource pulse caused by recent (2001-2009) outbreaks of geometrid moths in the subarctic mountain birch forest of the Varanger region in northern Norway. A large scale (20 km) transect design, implementing window (flight interception) traps and replicated in two areas, was used to compare beetle community structure between outbreak (dead wood) and non-outbreak (live wood) locations. The overall abundance and species richness of saproxylic beetles did not differ consistently between live- and dead wood sections of the transects. However, the two most common early successional saproxylic species, Hylecoetus dermestoides and Rabocerus foveolatus, were significantly more abundant in the dead wood sections of both transects, while no such responses were found in later successional saproxylic species. With respect to trophic groups, mycetophagous beetles were significantly more abundant in dead wood, but this response was entirely driven by H. dermestoides. Moreover, carnivorous beetles strongly dominated the beetle community along the entire transects, regardless of wood vitality. The lack of an overall response from saproxylic beetles to dead-wood-availability, combined with the raised abundance of a few early successional species, suggests that four to eight years after the moth outbreaks saproxylic beetle succession in the Varanger region is still in an initial phase. Master Thesis Northern Norway Subarctic Varanger University of Tromsø: Munin Open Research Archive Norway |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 Coleoptera saproxylic dead wood resource pulse numerical response VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 BIO-3910 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 Coleoptera saproxylic dead wood resource pulse numerical response VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 BIO-3910 Schultze, Sabrina Do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks? |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 Coleoptera saproxylic dead wood resource pulse numerical response VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488 BIO-3910 |
description |
Outbreaks of defoliating insects periodically cause mass mortality of trees, thereby generating pulses of dead wood resources for saproxylic (i.e. dead-wood dependent) organisms. This study investigated the responses of saproxylic beetles to a dead wood resource pulse caused by recent (2001-2009) outbreaks of geometrid moths in the subarctic mountain birch forest of the Varanger region in northern Norway. A large scale (20 km) transect design, implementing window (flight interception) traps and replicated in two areas, was used to compare beetle community structure between outbreak (dead wood) and non-outbreak (live wood) locations. The overall abundance and species richness of saproxylic beetles did not differ consistently between live- and dead wood sections of the transects. However, the two most common early successional saproxylic species, Hylecoetus dermestoides and Rabocerus foveolatus, were significantly more abundant in the dead wood sections of both transects, while no such responses were found in later successional saproxylic species. With respect to trophic groups, mycetophagous beetles were significantly more abundant in dead wood, but this response was entirely driven by H. dermestoides. Moreover, carnivorous beetles strongly dominated the beetle community along the entire transects, regardless of wood vitality. The lack of an overall response from saproxylic beetles to dead-wood-availability, combined with the raised abundance of a few early successional species, suggests that four to eight years after the moth outbreaks saproxylic beetle succession in the Varanger region is still in an initial phase. |
format |
Master Thesis |
author |
Schultze, Sabrina |
author_facet |
Schultze, Sabrina |
author_sort |
Schultze, Sabrina |
title |
Do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks? |
title_short |
Do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks? |
title_full |
Do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks? |
title_fullStr |
Do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks? |
title_full_unstemmed |
Do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks? |
title_sort |
do saproxylic beetles respond numerically to rapid changes in dead wood availability following moth outbreaks? |
publisher |
Universitetet i Tromsø |
publishDate |
2012 |
url |
https://hdl.handle.net/10037/5129 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway Subarctic Varanger |
genre_facet |
Northern Norway Subarctic Varanger |
op_relation |
https://hdl.handle.net/10037/5129 URN:NBN:no-uit_munin_4841 |
op_rights |
openAccess Copyright 2012 The Author(s) |
_version_ |
1766145722747453440 |