Tree mortality after prescribed burning in an old-growth Scots pine forest in northern Sweden

Linder, Per; Jönsson, Peter; Niklasson, Mats

doi:10.14214/sf.675

Cited by 45 publications

(36 citation statements)

References 22 publications

(13 reference statements)

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“…trees with high diameters located in irregular stands) have lower probability of dying. This is in concordance with other studies (Ryan and Reinhardt 1988, Linder et al 1998, González et al 2007). This finding is also coherent with other studies (Monserud and Sterba 1999, Van Mantgem et al 2003, González et al 2005, dominant trees experiencing less competitive stress than smaller ones.…”

Section: Discussionsupporting

confidence: 93%

“…Logistic regression has been used earlier for predicting tree-mortality as a consequence of prescribed fire (Botelho et al 1996, Linder et al 1998) and wildfire (Regelbrugge and Conard 1993, Harrington 1993, Stephens and Finney 2002, Beverly and Martell 2003, McHugh and Kolb 2003, Rigolot 2004, González et al 2007). Yet, these models used variables that are seldom available for long-term forest planning.…”

Section: Discussionmentioning

confidence: 99%

“…Thus mortality models should include variables such as forest density, species composition or mean diameter. It has been shown that variables such as these are related with fire damage (Linder et al 1998, Pollet and Omi 2002, McHugh and Kolb 2003. Managers may modify effectively expected levels of fire damage by targeting specific values for these variables (Pollet and Omi 2002, Agee and Skinner 2005, González et al 2007.…”

Section: Introductionmentioning

confidence: 99%

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Developing post-fire Eucalyptus globulus stand damage and tree mortality models for enhanced forest planning in Portugal

Marques

García-Gonzalo

Borges³

et al. 2011

Silva Fenn.

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Forest and fire management planning activities are carried out mostly independently of each other. This paper discusses research aiming at the development of methods and tools that can be used for enhanced integration of forest and fire management planning activities. Specifically, fire damage models were developed for Eucalyptus globulus Labill stands in Portugal. Models are based on easily measurable forest characteristics so that forest managers may predict post-fire mortality based on forest structure. For this purpose, biometric data and fire-damage descriptors from 2005/2006 National Forest Inventory plots and other sample plots within 2006, 2007 and 2008 fire areas were used. A three-step modelling strategy based on logistic regression methods was used. In the first step, a model was developed to predict whether mortality occurs after a wildfire in a eucalypt stand. In the second step the degree of damage caused by wildfires in stands where mortality occurs is quantified (i.e. percentage of mortality). In the third step this mortality is distributed among trees. Data from over 85 plots and 1648 trees were used for modeling purposes. The damage models show that relative damage increases with stand basal area. Tree level mortality models indicate that trees with high diameters, in dominant positions and located in regular stands are less prone to die when a wildfire occurs.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Developing post-fire Eucalyptus globulus stand damage and tree mortality models for enhanced forest planning in Portugal

Marques

García-Gonzalo

Borges³

et al. 2011

Silva Fenn.

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“…In one of the stands, a low intensity underburn occurred beneath the mature forest canopy in an old-growth forest with low tree mortality. In this stand, the number of fruiting EM fungal taxa the following two years was 26, compared to 41 in the nearby old stand (Linder et al 1999, Jonsson et al 1999a. This difference in fruiting may be due to spatial variation as well as to: a) reduced allocation of photosynthate to the forest soil resulting from fi re damaged trees, b) reduced abundance of mycorrhizas, but not necessarily extermination of EM fungal taxa, and c) hampered fruiting due to altered environmental conditions in the organic layer, i.e.…”

Section: Effects On Sporocarp Production Of Em Fungimentioning

confidence: 82%

Effects of fire on ectomycorrhizal fungi in Fennoscandian boreal forests

Dahlberg¹

2002

Silva Fenn.

110

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Fire, the primary natural disturbance factor in Fennoscandian boreal forests, is considered to have exerted major selection pressure on most boreal forest organisms. However, recent studies show that few ectomycorrhizal (EM) fungi appear to have evolved post-fi re adaptations, no succession of EM fungi following fi re is apparent after low intensity fi res, and only two EM fungal taxa exclusively fruit at post-fi re conditions. In this paper I review the present knowledge of effects of forest fi re on EM fungal communities in Fennscandian boreal forests, put into perspective by a comparison from other parts of the world. Characteristically, these boreal forests consist of less than a handful of tree species, e.g. Scots pine and Norway spruce, while the below ground communities of EM fungi is impressively species rich with presently more than 700 known taxa. Commonly, forest fi res in Fennoscandia have been of low intensity, with a considerable portion of the trees surviving and the organic humus layer partly escaping combustion. Hence, EM fungi appear to largely have evolved under conditions characterised by a more or less continuous presence of their hosts. In fact, the composition of EM fungi within a forest appear be more variable due to spatial variation than due to wildfi re. However, in areas with high intensity burns and high tree mortality, most EM fungi may locally be killed. Thus, the legacy of EM fungi following wildfi re depends on the survival of trees, which determine the potential for mycorrhizal growth, and the combustion and heating of the organic soil, which directly correlate to mortality of mycorrhizas. The questions if and to what degree fi res may be of signifi cance for yet unidentifi ed spatiotemporal dynamics of EM fungal populations and communities are discussed. Recent experiments indicate a few EM fungi are favoured by high intensity burn conditions whereas others disappear. The consequences of wildfi res in temperate conifer forests differ considerably from those in boreal forests. Wildfi res in temperate conifer forests are typically high intensity stand-replacing fi res that cause a total combustion of organic layers. Subsequently, prefi re EM fungal communities are largely eradicated and a succession of post-fi re EM fungi is initiated.

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“…Nicoll et al 1995;Silen et al, 1993;Stokes et al, 1997). Concerning fire, the survival capability of a tree to fire has been related to variables such as the tree size, bark thickness, tree architecture and vigour (Hély et al, 2003;Linder et al, 1998;Ryan and Reinhardt, 1988;Van Mantgem et al, 2003) which are at least partly under genetic control.…”

Section: Stand Compositionmentioning

confidence: 99%

Influences de la sylviculture sur le risque de dégâts biotiques et abiotiques dans les peuplements forestiers

Jactel

Nicoll

Branco³

et al. 2009

Ann. For. Sci.

225

167

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Abstract• This article synthesizes and reviews the available information on the effects of forestry practices on the occurrence of biotic and abiotic hazards, as well as on stand susceptibility to these damaging agents, concentrating on mammal herbivores, pest insects, pathogenic fungi, wind and fire.• The management operations examined are site selection, site preparation, stand composition, regeneration method, cleaning and weed control, thinning and pruning, and harvesting. For each of these operations we have examined how they influence the occurrence of biotic and abiotic damaging agents, the susceptibility of European forests, and describe the ecological processes that may explain these influences.• Overall, we find that the silvicultural operations that have the largest influence on both biotic and abiotic risks to European forest stands are closely related to species composition and the structure of the overstorey. Four main processes that drive the causal relationships between stand management and susceptibility have been identified: effect on local microclimate, provision of fuel and resources to biotic and abiotic hazards, enhancement of biological control by natural enemies and changes in individual tree physiology and development.• The review demonstrates an opportunity to develop silvicultural methods that achieve forest management objectives at the same time as minimising biotic and abiotic risks. Mots-clés :sylviculture / peuplement / occurrence / sensibilité / Résumé -Influences de la sylviculture sur le risque de dégâts biotiques et abiotiques dans les peuplements forestiers.• Cette revue bibliographique s'intéresse aux effets de la sylviculture sur la sensibilité des peuplements forestiers aux principaux agents de dégâts biotiques et abiotiques que sont les mammifères herbivores, les insectes ravageurs, les champignons pathogènes, le feu et les vents forts. * Corresponding author: herve.jactel@pierroton.inra.frArticle published by EDP Sciences Ann. For. Sci. 66 (2009) 701 H. Jactel et al.• Les pratiques forestières analysées sont la sélection et la préparation des sites de reboisement, la définition de la composition en essences et le choix du matériel génétique, les méthodes de régé-nération et d'entretien, les modalités d'éclaircie et d'élagage, le mode de récolte finale. L'influence de chacune de ces opérations sur l'occurrence des agents de dégâts biotiques et abiotiques et sur la sensibilité des peuplements est examinée ainsi que les processus écologiques sous-jacents.• Les opérations sylvicoles qui se révèlent les plus déterminantes pour la sensibilité des forêts en Europe sont celles qui affectent la composition et la structure de la strate arborée. Quatre principaux processus écologiques semblent expliquer la relation entre sylviculture et sensibilité des peuplements : la modification du micro-climat, l'apport de ressources ou de combustible aux agents de dégâts, l'amélioration du contrôle biologique par les ennemis naturels et l'altération de la physiologie et du développement des arb...

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Tree mortality after prescribed burning in an old-growth Scots pine forest in northern Sweden

Cited by 45 publications

References 22 publications

Developing post-fire Eucalyptus globulus stand damage and tree mortality models for enhanced forest planning in Portugal

Developing post-fire Eucalyptus globulus stand damage and tree mortality models for enhanced forest planning in Portugal

Effects of fire on ectomycorrhizal fungi in Fennoscandian boreal forests

Influences de la sylviculture sur le risque de dégâts biotiques et abiotiques dans les peuplements forestiers

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