Positive effects of ecological restoration on rare and threatened flat bugs (Heteroptera: Aradidae)

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• 作者：Ruaridh H?gglund ; Anne-Maarit Hekkala ; Joakim Hj?ltén…
• 关键词：Fire ; Boreal forest ; Disturbance ; Gap cutting ; Red ; listed insects
• 刊名：Journal of Insect Conservation
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：19
• 期：6
• 页码：1089-1099
• 全文大小：607 KB
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• 作者单位：Ruaridh H?gglund (1)
  Anne-Maarit Hekkala (2) (3)
  Joakim Hj?ltén (1)
  Anne Tolvanen (2) (3)
  
  1. Department of Fish, Wildlife and Environmental Studies, Swedish University of Agricultural Sciences, Skogsmarksgr?nd, 901 83, Ume?, Sweden
  2. Thule Institute, University of Oulu, PO Box 7300, 90014, Oulu, Finland
  3. Natural Resources Institute Finland (Luke), University of Oulu, PO Box 413, 90014, Oulu, Finland
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Animal Systematics/Taxonomy/ Biogeography
  Evolutionary Biology
  Human Genetics
  
• 出版者：Springer Netherlands
• ISSN：1572-9753

文摘

Intensive management of boreal forests has replaced natural disturbances, leading to losses of residual deadwood and saproxylic biodiversity. Declining population sizes have been well documented for insect groups such as bark and wood-boring beetles, whilst other groups such as flat bugs (Heteroptera: Aradidae) are less well-studied and little is known about their response to forest restoration. We conducted two restoration experiments addressing this lack of knowledge. We predicted the following responses to restoration: (1) artificial gap-creation and prescribed burning will attract more flat bugs than control stands, (2) increasing pre-burning fuel loads will have a positive influence on flat bug response to fire restoration. To test these predictions we conducted two field experiments; in Sweden we compared prescribed burning of standing forest with artificial gap-creation and in Finland we compared differing levels of fuel-load prior to burning. We found partial support for our first prediction, total numbers of flat bugs collected was higher in burned forest stands compared to controls in both countries. By contrast, gap-cutting only resulted in a marginal increase in the numbers and species of flat bugs collected. We found no support for our second hypothesis. The red-listed Aradus angularis and A. laeviusculus were primarily found in burned stands. Aradus betulae, A. betulinus and A. lugubris were more frequent in burned stands than gap-cuttings and untreated controls. Our study therefore suggests that ecological restoration, especially burning, is an efficient way of attracting flat bugs to suitable habitat, we therefore recommend ecological restoration to be incorporated in boreal forest management. Keywords Fire Boreal forest Disturbance Gap cutting Red-listed insects