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High conservation value forests for burn-associated saproxylic beetles: an approach for developing sustainable post-fire salvage logging in boreal forest

Boucher Jonathan, Hébert Christian, Ibarzabal Jacques et Bauce Éric. (2016). High conservation value forests for burn-associated saproxylic beetles: an approach for developing sustainable post-fire salvage logging in boreal forest. Insect Conservation and Diversity, 9, (5), p. 402-415.

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1. Fire-killed timber is considered as a loss of potential revenues andis thus increasingly salvaged, though not without concerns for biodiversity con-servation. Indeed, a large diversity of burn-associated saproxylic beetles userecently burned trees. 2. This study intends to reduce potential impacts of salvage logging on biodi-versity by identifying high conservation value forests (HCVFs) for burn-associated beetles, which are considered the most at risk. 3. In five burns ignited naturally in 2010 in the eastern Canadian boreal for-est, we selected 31 and 29 stands of black spruce and jack pine respectively.Three 50-cm bole segments were retrieved from each stand and placed inemergence cages to measure tree utilisation by saproxylic beetles. This yielded7235 beetles from 103 taxa, of which 67 were considered rare (<5% occurrencein logs) and 36 as common taxa (>5% occurrence in logs). 4. Among the common taxa, we identified six groups of ecologically relatedspecies using co-occurrence-based hierarchical clustering, among which threewere mainly formed by opportunistic species that are currently of little concernin a post-fire logging context. The three other groups were formed by burn-associated species that could be affected by salvage logging. 5. HCVFs include jack pine stands and large trees of either tree species oflow- to mid-range burn severity. We also recommend retaining the periphery ofburned stands, as ecotones are rich habitats used by several burn-associatedspecies that are found in low numbers in green forests but they benefit fromburned habitats by increasing their populations significantly.

Type de document:Article publié dans une revue avec comité d'évaluation
Pages:p. 402-415
Version évaluée par les pairs:Oui
Identifiant unique:10.1111/icad.12175
Sujets:Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Mots-clés:Acmaeops pratensis, biodiversity, burn severity, Canada, co‐occurrence, deadwood, emergence cages, null model analysis, species‐habitat association, wildfire
Déposé le:25 mai 2023 22:12
Dernière modification:20 nov. 2023 20:34
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