A density management diagram for Norway spruce in the temperate European montane region

Vacchiano, Giorgio; DeRose, R. Justin; Shaw, John D.; Svoboda, Miroslav; Motta, Renzo

doi:10.1007/s10342-013-0694-1

Cited by 23 publications

(15 citation statements)

References 55 publications

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“…), which is the economically most relevant tree species of Central Europe (Vacchiano et al 2013). Because wintering bird communities feed mainly on insects of bark and foliage, the differences in bird communities between logged and unlogged plots may be governed by the number of coniferous trees (Davis 2001).…”

Section: Introductionmentioning

confidence: 99%

Natural regeneration determines wintering bird presence in wind-damaged coniferous forest stands independent of postdisturbance logging

et al. 2015

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Natural disturbances in European production forests are undesired from an economic perspective but are important drivers of biodiversity. The removal of damaged timber to restore economic value is accompanied by negative effects on various species groups, particularly breeding bird communities, and can hinder natural regeneration. However, little is known about the effect of postdisturbance logging on bird assemblages in winter when temperatures are low and food resources are unpredictable. We conducted fixed-radius point counts of wintering birds in forest stands logged or unlogged after windthrows and in mature forest stands to test our predictions that bird species densities and abundances (i) are lower in postdisturbance logged stands and (ii) depend on the amount of natural regeneration, (iii) which differs between logged and unlogged stands. Our generalized linear mixed model did not support the expected differences in bird abundance or species densities between postdisturbance logged and unlogged stands but indicated that mature forest stands harbor the highest bird abundances and species densities. The number of regenerated coniferous trees significantly positively affected wintering bird abundances in both postdisturbance logged and unlogged stands. Hence, the number of coniferous trees appears to be a main predictor of wintering bird presence.Résumé : Les perturbations naturelles dans les forêts commerciales européennes ne sont pas souhaitables d'un point de vue économique, mais elles constituent d'importants rouages de la biodiversité. La récupération du bois endommagé pour restaurer la valeur économique a des effets négatifs sur plusieurs groupes d'espèces, en particulier sur les communautés d'oiseaux nicheurs, et elle peut nuire à la régénération naturelle. Toutefois, on connaît peu les effets que les coupes de récupération après une perturbation naturelle peuvent avoir sur les assemblages d'oiseaux en hiver, quand les températures sont basses et les ressources alimentaires imprévisibles. Nous avons effectué des dénombrements d'oiseaux d'hiver par points d'écoute à rayon fixe dans des peuplements forestiers récoltés et non récoltés après un chablis et dans des peuplements forestiers mûrs pour tester les prédictions que la densité des espèces et l'abondance des oiseaux (i) sont plus faibles dans les peuplements récoltés après une perturbation et (ii) dépendent de la quantité de régénération naturelle (iii) qui diffère entre les peuplements récoltés et non récoltés. Notre modèle linéaire mixte généralisé n'a pas confirmé les différences prédites dans l'abondance des oiseaux ou la densité des espèces entre les sites récoltés et non récoltés, mais il a indiqué que les peuplements forestiers mûrs ont la plus grande abondance et la plus forte densité d'espèces d'oiseaux. L'abondance de la régénération de conifères a eu un effet positif significatif sur l'abondance des oiseaux d'hiver dans les peuplements perturbés tant récoltés que non récoltés. Il semble donc que le nombre de tiges de conifères soit un im...

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Section: Introductionmentioning

confidence: 99%

Natural regeneration determines wintering bird presence in wind-damaged coniferous forest stands independent of postdisturbance logging

et al. 2015

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“…DMDs are graphical models that reflect the relationships between yield and density at all stages of stand development in even-aged stands, and they are useful for designing, displaying and evaluating alternative density management regimes (e.g. Newton 2012;Vacchiano et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Using density management diagrams to assess crown fire potential in Pinus pinaster Ait. stands

Gómez-Vázquez¹,

Fernandes²,

Arias-Rodil³

et al. 2013

Annals of Forest Science

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International audienceContextDensity management diagrams (DMDs) are useful for designing, displaying and evaluating alternative density management regimes for a given stand-level management objective. The inclusion of variables related to crown fire potential within DMDs has not previously been considered.AimsThe aim of this study was to include isolines of variables related to crown fire initiation and spread in DMDs to enable identification of stand structures associated with different types of wildfire.MethodsBiometric and fuel data from maritime pine (Pinus pinaster Ait.) stands in NW Spain were used to construct DMDs. Different surface and crown fire behaviour models were used together to estimate crown fire potential.ResultsThe crown fire potential varied greatly throughout development of the maritime pine stands. Low stands were more prone to crowning. The type of crown fire was mainly determined by stand density.ConclusionThe DMDs developed can be used to identify relationships between stand structure and crown fire potential, thus enabling the design of thinning schedules aimed at reducing the likelihood of crowning

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“…Karst. [96]. However, all of these studies assumed a constant slope of the self-thinning line with value of −1.605 (Reineke equation), which was shown to vary with site quality in the present study.…”

Section: Discussionmentioning

confidence: 71%

Does the Slope of the Self-thinning Line Remain a Constant Value across Different Site Qualities?—An Implication for Plantation Density Management

Zeng

Wörns

et al. 2017

Forests

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Abstract:The self-thinning rule is regarded as one of the most important principles in plantation management. This rule, involving the assumption of a constant slope coefficient, has been universally applied when regulating stand density. In this study, we hypothesized that the slope coefficient can change significantly with changes in site quality. To test this hypothesis, we first grouped forest plots into 5 categories based on site index. Second, we produced the self-thinning line represented by the Reineke function for each of the 5 site categories, selecting fully stocked plots using reduced major axis regression. Third, the slope coefficients for the different categories were tested for significant differences. The results indicated that in general, the slope was significantly different with different site quality. In addition, we observed that the slope of the self-thinning line exhibited a steeper trend for sites of lower quality, which indicated increased self-thinning or reduced self-tolerance. Finally, we concluded that it is imperative to produce specific self-thinning lines for different site quality categories.

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A density management diagram for Norway spruce in the temperate European montane region

Cited by 23 publications

References 55 publications

Natural regeneration determines wintering bird presence in wind-damaged coniferous forest stands independent of postdisturbance logging

Natural regeneration determines wintering bird presence in wind-damaged coniferous forest stands independent of postdisturbance logging

Using density management diagrams to assess crown fire potential in Pinus pinaster Ait. stands

Does the Slope of the Self-thinning Line Remain a Constant Value across Different Site Qualities?—An Implication for Plantation Density Management

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