Optimal management of uneven-aged Norway spruce stands

Tahvonen, Olli; Pukkala, Timo; Laiho, Olavi; Lähde, Erkki; Niinimäki, Sami

doi:10.1016/j.foreco.2010.04.006

Cited by 127 publications

(98 citation statements)

References 25 publications

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“…Tahvonen et al [37] used data from long-term experiments of uneven-aged forest to develop a transition matrix growth model [38] for a Norway spruce stand and formulated a NLP problem searching for the optimal management. Tahvonen [39] extended the study by Tahvonen et al [37] and applied a more detailed single tree growth model rather than transition matrix model to an uneven-aged Norway spruce stand. Pukkala et al [40] optimized a mixed forest stand with pine, spruce, and birch in Finland using the Hooke and Jeeves method without specific optimization formulation.…”

Section: Non-linear Programming (Nlp) Approachmentioning

confidence: 99%

Stand-Level Forest Management Planning Approaches

2016

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Seeking an optimal operational regime under different management environments has been one of the main concerns of forest managers. Traditionally, the main operational regime includes planting density or regeneration scheme, thinning time/intensity, and optimal time to harvest over the given time horizon. Deterministic approaches to tackle this type of optimization problem with different controls have dominated the solution techniques in forestry literature. We present in this paper an overview of the methodologies used in stand-level optimization, in which we show the strengths and weaknesses of these methodologies as well as provide comments on the effectiveness of the methodology. We then propose a new dynamic programing approach for generalizing solution specification and techniques.

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Section: Non-linear Programming (Nlp) Approachmentioning

confidence: 99%

Stand-Level Forest Management Planning Approaches

2016

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“…In fact, in all of the transformation scenarios modelled, the higher efficiencies and greater yields of heavy early thinnings lead to lower net costs over the first twenty years. Thus, there appears to be a short-term financial argument for a change in thinning practice even if there is no intention to transform to CCF; the economic benefits of thinning from above have also been noted by [50].…”

Section: Comparison Of Scenariosmentioning

confidence: 99%

“…Transformation practice in reality must be based on a consideration of the current state of a stand, and it may be financially optimal to clearfell and replant a mature stand with a view to transforming the successor crop [50].…”

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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“…However, it seems that there has been a change of mind in the last decades and both harvesting regimes often coexist [23]. Even Finland, where selective logging is prohibited by law, is questioning its previous evaluation [24]. Speaking mathematically, a bang-bang structure of harvesting efforts u reflects selective logging when all trees with a certain diameter are to be harvested.…”

Section: On the Structure Of Solutionmentioning

confidence: 99%

Optimal harvesting in forestry: steady-state analysis and climate change impact

Hritonenko

Yatsenko

Goetz

et al. 2013

Journal of Biological Dynamics

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We perform the steady-state analysis of a nonlinear partial differential equation model that describes the dynamics of a managed size-structured forest. The harvesting policy is to maximize the net benefits from timber production over an infinite planning horizon. The existence and uniqueness of the steady-state trajectories are analysed. Closed-form steady states are obtained in meaningful special cases and are used to estimate how climate change affects the optimal harvesting regime, diameter of cut trees, number of logged trees, and net benefits in the long run.

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Optimal management of uneven-aged Norway spruce stands

Cited by 127 publications

References 25 publications

Stand-Level Forest Management Planning Approaches

Stand-Level Forest Management Planning Approaches

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

Optimal harvesting in forestry: steady-state analysis and climate change impact

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