Stand development after different thinnings in two uneven-aged Picea abies forests in Sweden

Lundqvist, Lars; Chrimes, Dillon; Elfving, Björn; Mörling, Tommy; Valinger, Erik

doi:10.1016/j.foreco.2006.10.006

Cited by 31 publications

(26 citation statements)

References 11 publications

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“…Clearcutting is found to yield slightly higher net present value compared to uneven-aged management but all three forest management methods were found to be economically reasonable. Lundqvist et al (2007) found volume increments to be higher in plots thinned from above than from plots thinned from below and that natural regeneration was sufficient for replacing the trees harvested. Tahvonen (2007Tahvonen ( , 2009) applies a transition matrix model from Kolström (1993) and Pukkala and Kolström (1988).…”

Section: Introductionmentioning

confidence: 46%

“…A similar finding was reported by Andreassen and Øyen (2002). The superiority of thinnings from above to thinnings from below is in line with the findings by Lundqvist et al (2007). In contrast to these earlier studies on Norway spruce, here the results are obtained applying empirical data together with a systematic optimization setup.…”

Section: Effects Of Economic Parameters On the Optimal Choice Betweenmentioning

confidence: 99%

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Optimal management of uneven-aged Norway spruce stands

Tahvonen

Pukkala

Laiho³

et al. 2010

Forest Ecology and Management

123

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Section: Introductionmentioning

confidence: 46%

Section: Effects Of Economic Parameters On the Optimal Choice Betweenmentioning

confidence: 99%

Optimal management of uneven-aged Norway spruce stands

Tahvonen

Pukkala

Laiho³

et al. 2010

Forest Ecology and Management

123

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“…However, thinning from above in Norway spruce stands in Sweden has been found to give consistently higher volume increment than thinning from below [55], an effect not necessarily reflected in the figures used in this study, so it is possible that CCF volume yields may be higher than the figures in this study suggest.…”

Section: Comparison Of Scenariosmentioning

confidence: 99%

Comparing the Costs and Revenues of Transformation to Continuous Cover Forestry for Sitka Spruce in Great Britain

Davies

Kerr

2015

Forests

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Abstract:Recently continuous cover forestry (CCF) has become an accepted approach to forest management in Britain, but uncertainty about its economic consequences may be a barrier to its wider use. A study was carried out to examine the costs and revenues of transforming a stand of Sitka spruce (Picea sitchensis (Bong.) Carr.) to CCF. The main conclusion is that transformation to CCF need not be more costly than clearfelling and replanting if natural regeneration is successful and the aim is to produce a simple canopy structure. The long-term value of transformation to a more complex canopy structure, with three or more strata, is lower and the extra costs need to be justified in terms of management objectives. The main output from the study is an analysis spreadsheet that empowers practitioners and policy makers to investigate the effects of costs, revenues and discount rates on estimates of net present value over 20 years, 100 years and in perpetuity, to suit local conditions. This paper summarises the method and results of the study in a British context, sets these in a wider international context, and considers the merits, applications and possible further developments of the approach.

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“…The growth functions for multi-layered forest using mean stand age were tested with 15 years of observations from an uneven-aged spruce stand in Central Sweden (Elfving 2009) managed by single-tree selection (Lundqvist et al 2007). The initial diameter distribution was characterized by a large number of small trees (on average 500 trees·ha -1 with 5-10 cm DBH), a pronounced exponential decrease in tree numbers, and about 50 cm DBH maximum.…”

Section: Growth Models Parameterized Under Swedish Conditionsmentioning

confidence: 99%

Application and limitations of growth models for silvicultural purposes in heterogeneously structured forest in Sweden

Drößler¹,

Fahlvik²,

Elfving³

2013

J. For. Sci.

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ABSTRACT:The paper addresses the problem of estimating future stand development in heterogeneously structured forests in Sweden; specifically, multi-layered spruce stands and mature pine stands with advanced spruce undergrowth. We first introduce various supporting concepts and models with their empirical databases, model validation and constraints. Secondly, Swedish single-tree growth functions designed for more heterogeneously structured forest are tested using data from inventory plots, a thinning experiment in an uneven-aged forest stand, and yield plots in pristine forest. Future growth of a managed, multi-layered forest was simulated and is compared with other selected functions. Simulation results, expected errors and time constraints are discussed. For most models, projected stand basal area growth deviated 10-20% from the observed growth in individual stands. In single stands, the deviation ranged from 0 to 60%. Validation periods were often 5-15 years, sometimes even more than 30 years. For Swedish single-tree basal area growth functions, on average, a 5% overestimate was found for heterogeneously structured forest across Sweden. Observed growth in a boreal single-tree selection forest was underestimated by 12.5% fifteen years after thinning from above.

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Stand development after different thinnings in two uneven-aged Picea abies forests in Sweden

Cited by 31 publications

References 11 publications

Optimal management of uneven-aged Norway spruce stands

Optimal management of uneven-aged Norway spruce stands

Comparing the Costs and Revenues of Transformation to Continuous Cover Forestry for Sitka Spruce in Great Britain

Application and limitations of growth models for silvicultural purposes in heterogeneously structured forest in Sweden

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