Functions for Biomass Estimation of Young Pinus sylvestris, Picea abies and Betula spp. from Stands in Northern Sweden with High Stand Densities

Claesson, Svante; Sahlén, Kenneth; Lundmark, Tomas

doi:10.1080/028275801300088206

Cited by 65 publications

(63 citation statements)

References 14 publications

(22 reference statements)

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“…While plenty of papers show allometric equations for old European beech and Norway spruce stands (CIENCIALA et al, 2005;WIRTH et al, 2004;FEHRMANN & KLEINN, 2006;SEIDL et al, 2010) only a few authors focus on their young growth stages (e.g. CLAESSON et al, 2001;PAJTÍK et al, 2011a). At the same time, equations for tree compartment biomass estimated for large and older trees are not generally applicable to young trees (WIRTH et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Above-ground net primary productivity in young stands of beech and spruce

Pajtík¹,

Konôpka²,

Marušák³

2013

Forestry Journal

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One of the expected consequences of climate change and its inherent phenomena to forest ecosystems is the gradual modification of their tree species composition (i.e. expansion of resistant species instead of less resistant ones). Climate change accompanied with increasing temperatures and a lack of precipitations may present a threat especially to spruce stands in the European part of the temperate zone. European beech is one of the possible forest tree species which might replace the potentially endangered spruce. In this paper, we observed, by using a combination of continual measurements and destructive whole-tree sampling, standing stocks of above-ground biomass (i.e. stem, branches, and foliage) and its annual net primary productivity (NPP) in naturally regenerated young stands of beech and spruce. We intentionally selected a site where the changing climate conditions are better suited to the ecological demands of beech rather than spruce (the species is dominant in the observed area). We recorded only small differences in the standing stock of stems of the beech, if based on tons per ha. However, this is in favor of spruce if based on cubic meters per ha. The largest difference between the species was found for the standing stock of foliage, spruce retained three times the biomass of beech. Also, beech allocated more carbohydrates to stem than spruce. On the other hand, we estimated nearly the same production of foliages and branches in both stands.

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Section: Introductionmentioning

confidence: 99%

Above-ground net primary productivity in young stands of beech and spruce

Pajtík¹,

Konôpka²,

Marušák³

2013

Forestry Journal

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“…Extrapolating these equations to smaller diameters far outside of the data range used to develop them is questionable [7,36]. Moreover, the high density of a young natural regeneration must be taken into account to avoid underestimation of the belowground biomass.…”

Section: Introductionmentioning

confidence: 99%

Allometric biomass equations for Scots pine (Pinus sylvestris L.) seedlings during the first years of establishment in dense natural regeneration

et al. 2004

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-A dense natural regeneration of Scots pine (Pinus sylvestris L.) exhibits a considerable biomass build-up in the first four years, with amounts of 7.03 Mg ha -1 for aboveground biomass, and 0.88 Mg ha -1 for coarse root biomass (> 1 mm). Power equations were developed, which relate collar diameter (ranging from 0.3 to 2.7 cm) and height to total aboveground and coarse root biomass of two, three and four-yearold seedlings in a regeneration of 16 seedlings m -2 at one site in Belgium. During the first years of establishment, seedling allometry changes with age, whilst the density remains constant. Biomass equations developed for one of the three ages can produce biased predictions for the other ages. Even when an equation is based on data for all ages and information on height is included, age still has to be considered as a potential predictor variable. For pooled ages, linear regression after logarithmic transformation of the power equation, selected other predictors than weighted non-linear regression. The former approach indicated significant interactions between predictors, while the latter does not reveal interactions.allometry / aboveground biomass / coarse root biomass / seedling / Pinus sylvestris L.Résumé -Équations d'allométrie de biomasse pour semis de pin sylvestre (Pinus sylvestris L.) dans les premières années d'établissement d'une régénération naturelle dense. Une régénération naturelle dense de pin sylvestre (Pinus sylvestris L.) montre une accroissement considérable de biomasse dans les quatre premières années, avec des quantités de 7,03 Mg ha -1 pour la biomasse aérienne et 0,88 Mg ha -1 pour la biomasse des grosses racines (> 1 mm). Des équations de type puissance mettant en relation le diamètre au niveau du collet racinaire (intervalle de 0,3 à 2,7 cm) et la hauteur avec la biomasse aérienne et la biomasse des grosses racines de semis de pin sylvestre âgés de deux, trois et quatre ans ont été développées dans une régénération d'une densité de 16 semis m -2 sur un site en Belgique. Entre la deuxième et la quatrième année, à densité stationnaire, la relation d'allométrie des semis change avec l'âge. Les équations de biomasse développées pour les semis d'un même âge, peuvent produire des prédictions erronées pour les autres âges. Même en utilisant des donnés de tous les âges et la variable hauteur, l'âge doit être considéré comme une variable potentielle dans l'analyse de régression. En utilisant des donnés de tous les âges, l'analyse de régression linéaire a retenu différentes variables que l'analyse de régression non-linéaire pondérée. La première désignait des interactions significatives, tandis que la dernière ne considère pas les interactions. allométrie / biomasse aérienne / biomasse racinaire forte / semis / Pinus sylvestris L.

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“…However, if biofuels are to be used to meet some of the expected energy demands of the future, it will be necessary to develop new silvicultural regimes and techniques to ensure the efficient production and harvesting of suitable biomass (Guo 2010). In general, high stand densities result in high biomass production (Satoo and Madgwick 1982;Pettersson 1993), making young dense stands a rich source of materials for the production of forest biofuels (Eriksson and Nordén 1999;Claesson et al 2001). The amounts of foliage in these young and dense stands are about 15 % (Ulvcrona 2011).…”

Section: Introductionmentioning

confidence: 99%

Modelling biomass of young and dense Scots pine (Pinus sylvestris L.) dominated mixed forests in northern Sweden

Repola¹,

Ulvcrona²

2014

Silva Fenn.

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Modelling biomass of young and dense Scots pine (Pinus sylvestris L.) dominated mixed forests in northern SwedenRepola J., Ahnlund Ulvcrona K. (2014). Modelling biomass of young and dense Scots pine (Pinus sylvestris L.) dominated mixed forests in northern Sweden. Silva Fennica vol. 48 no. 5 article id 1190. 21 p. Highlights• The biomass allocation to tree components is different in unmanaged and managed young stands. • Higher foliage biomass and lower stem and branch biomass were detected in the unmanaged stands.• Models for trees from young and dense stands provide better estimates of biomass in such stands than those based on data from managed stands. AbstractBiomass models for the biomass of above-ground tree components of Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies [L.] Karst.) and birch (Betula pendula Roth and Betula pubescens Ehrh.) in young dense Scots pine dominated forest stands in northern Sweden were constructed. Destructive above-ground biomass sampling was conducted in naturally generated young, dense, Scots pine dominated mixed stands. Three sampling campaigns were undertaken, the first in 1997 and 1998. The second was six years later (2003), and the last 13 years after the first (2010). In total, 280 trees (126 Scots pine, 68 Norway spruce and 86 birches) were sampled from six different stands in northern Sweden. The sampled trees' diameter at breast height (dbh) was in the range 1-22 cm (Scots pine), 1-21 cm (Norway spruce) and 1-11 cm (birch). Biomass predictions were tested using our models and the widely used biomass models originally constructed for managed stands. The results showed that the biomass allocation to tree components is different in unmanaged and managed young stands; higher foliage biomass and lower stem and branch biomass were detected in the unmanaged stands. The overall conclusion is that the biomass models for managed stands did not produce satisfactory biomass estimates in unthinned, dense, young stands.

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Functions for Biomass Estimation of Young Pinus sylvestris, Picea abies and Betula spp. from Stands in Northern Sweden with High Stand Densities

Cited by 65 publications

References 14 publications

Above-ground net primary productivity in young stands of beech and spruce

Above-ground net primary productivity in young stands of beech and spruce

Allometric biomass equations for Scots pine (Pinus sylvestris L.) seedlings during the first years of establishment in dense natural regeneration

Modelling biomass of young and dense Scots pine (<i>Pinus sylvestris</i> L.) dominated mixed forests in northern Sweden

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