Saproxylic beetles in disturbed boreal forests: Temporal dynamics, habitat associations, and community structure

Boucher, Jean; Azeria, Ermias T.; Ibarzabal, Jacques; Hébert, Christian

doi:10.2980/19-4-3503

Cited by 41 publications

(33 citation statements)

References 45 publications

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“…The significant changes in assemblage composition, which is consistent with earlier studies of fire effects on saproxylic communities (Boucher et al 2012;Hekkala et al 2014;Hyvärinen et al 2009;Johansson et al 2011) was not only explained by higher abundances of fire favoured and fire dependent species but also by higher abundance of many other species, belonging to different functional groups, in burned stands. As predicted we found an increased abundance and species richness of cambivores and fire favoured beetles, most likely explained by the increased availability of dead cambium (Saint-Germain et al 2004Wikars 1997).…”

Section: Magdalis Violaceasupporting

confidence: 80%

“…This suggests that burned areas can maintain high population of fire favoured species over considerable time as weakened trees will continue to die for many years after a fire, thus creating new fresh dead wood substrates that can be colonized (Boucher et al 2012). However, long-term studies are needed to verify this.…”

Section: Magdalis Violaceamentioning

confidence: 99%

“…during thinning. This has led to an impoverished fauna of species associated with sun-exposed conditions and deciduous broad-leaved trees (Berg et al 1994;Bernes 2011;Westling 2015). Thus, restoring natural fire dynamics as well as gap dynamics is likely to improve the situation for biodiversity in boreal forest landscapes.…”

Section: Introductionmentioning

confidence: 99%

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Forest restoration by burning and gap cutting of voluntary set-asides yield distinct immediate effects on saproxylic beetles

et al. 2017

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Today, the importance of restoring natural forest disturbance regimes and habitat structures for biodiversity is widely recognized. We evaluated the immediate effects of two restoration methods on wood-inhabiting (saproxylic) beetles in boreal forest voluntary set-asides. We used a before-after control-impact experimental set-up in 15 setasides; each assigned to one of three treatments: (1) restoration burning, (2) gap cutting and (3) no-treatment reference stands. Before treatment, abundance, species richness and assemblage composition of trapped beetles did not differ significantly among treatments. Burning resulted in a significant change in assemblage composition and increased species richness and abundance compared to reference stands. As predicted, saproxylic species known to be fire favoured increased dramatically after burning. The immediate response shows that, initially, fire favoured species are attracted from the surrounding landscape and not produced on site. Gap cutting increased the abundance of cambium consumers but had no significant effect on total species richness or assemblage composition of saproxylic beetles. The stronger effect of burning compared to gap cutting on saproxylic assemblages is probably due to the very specific conditions created by fires that attracts many disturbance-dependent species, but that at the same time disfavour some disturbance-sensitive species. By contrast, gap cutting maintained assemblage composition, increased abundances and is likely to increase species richness in the years to follow, due to elevated level of dead wood. The restoration methods applied in this study may prove particularly useful, partly because of positive effect on saproxylic beetles, but also due to the cost-efficiency of the measures; the voluntary set-asides were already established and the restoration costs fully covered by revenue from the extracted timber.

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Section: Magdalis Violaceasupporting

confidence: 80%

Section: Magdalis Violaceamentioning

confidence: 99%

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Forest restoration by burning and gap cutting of voluntary set-asides yield distinct immediate effects on saproxylic beetles

et al. 2017

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“…BSP) snags decomposed more slowly than lightly burned snags. In addition, saproxylic beetle community structure has been shown to respond to differences in mortality cause directly (Boucher et al 2012). Available data will likely be sparse to adequately address this parameter.…”

Section: F) Mortality Causementioning

confidence: 99%

“…While grouping tree species may simplify modelling, care should be taken that potential links to biodiversity are not lost. Saproxylic beetle species, for instance, may predominantly use one tree species over another or may even be monophagous (Boucher et al 2012). …”

Section: D) Tree Speciesmentioning

confidence: 99%

Modelling deadwood supply for biodiversity conservation: Considerations, challenges and recommendations

Venier

Hébert

Grandpré

et al. 2015

The Forestry Chronicle

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There are concerns that deadwood supply (both snags and downed wood) may become a limiting resource for biodiversity conservation as the bio-economy develops. Despite this concern, it remains difficult to monitor all elements of biodiversity to ensure that forest management activities are not reducing deadwood below minimum thresholds. As a dynamic resource, deadwood quantity and quality does change throughout forest succession. Simulation modelling represents one approach to integrating this variability and supporting the refinement of forest management guidelines. In this paper, we review important considerations for developing deadwood models that address biodiversity concerns. These include defining initial conditions, estimating deadwood inputs over time, identifying parameters necessary to represent biodiversity, identifying data available to parameterize, calibrate and validate models, and identifying requirements for model validation and documentation. In addition, we consider how deadwood characteristics such as form, size, state of decay, tree species, cause of mortality and position can be treated in models to represent the full range of biodiversity requirements. Lastly, we review examples of stand-alone and study-specific deadwood modelling approaches to provide a road map for development of a robust, temporally dynamic deadwood model that addresses biodiversity and sustainability issues related to biomass harvest for bioenergy.Key words: deadwood modelling, biodiversity, bioenergy, coarse woody debris, decay class, sustainability. RÉSUMÉOn craint que les stocks de bois mort (sous forme d'arbres debout et de débris au sol) pourraient devenir une ressource limitative en matière de conservation de la biodiversité au fur et à mesure du développement de la bioéconomie. Malgré ces inquiétudes, il demeure difficile de surveiller tous les éléments de biodiversité pour s'assurer que les activités d'aména-gement forestier ne réduisent pas la quantité de bois mort en deçà d'un seuil limite. En tant que ressource dynamique, la quantité et la qualité du bois mort changent au cours de l' évolution des peuplements forestiers. Un modèle de simulation constitue une approche d'intégration de cette variabilité et permet de raffiner les directives d'aménagement forestier. Nous révisons dans cet article les principales considérations à retenir dans l' élaboration de modèles de bois mort qui tiennent compte des questions de biodiversité. Celles-ci comportent les conditions initiales, l' estimation de la production de bois mort en fonction du temps, l'identification des paramètres requis pour représenter la biodiversité, l'identification des données disponibles pour établir les paramètres, la calibration et la validation des modèles et l'identification de ce qui est requis pour valider et documenter les modèles. De plus, nous avons étudié comment les caractéristiques du bois mort comme sa forme, ses dimensions, son état de décomposition, son espèce, la cause de la mortalité et sa position, pouvaient être traitées...

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Toward a more ecologically informed view of severe forest fires

et al. 2016

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Abstract.We use the historical presence of high-severity fire patches in mixed-conifer forests of the western United States to make several points that we hope will encourage development of a more ecologically informed view of severe wildland fire effects. First, many plant and animal species use, and have sometimes evolved to depend on, severely burned forest conditions for their persistence. Second, evidence from fire history studies also suggests that a complex mosaic of severely burned conifer patches was common historically in the West. Third, to maintain ecological integrity in forests born of mixed-severity fire, land managers will have to accept some severe fire and maintain the integrity of its aftermath. Lastly, public education messages surrounding fire could be modified so that people better understand and support management designed to maintain ecologically appropriate sizes and distributions of severe fire and the complex early-seral forest conditions it creates.

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Saproxylic beetles in disturbed boreal forests: Temporal dynamics, habitat associations, and community structure

Cited by 41 publications

References 45 publications

Forest restoration by burning and gap cutting of voluntary set-asides yield distinct immediate effects on saproxylic beetles

Forest restoration by burning and gap cutting of voluntary set-asides yield distinct immediate effects on saproxylic beetles

Modelling deadwood supply for biodiversity conservation: Considerations, challenges and recommendations

Toward a more ecologically informed view of severe forest fires

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