scholarly journals Two Sets of Initial Conditions on Boreal Forest Carbon Storage Economics

2021 ◽  
Author(s):  
Petri P. Kärenlampi
Keyword(s):  
Carbon Storage ◽  
Growth Model ◽  
Boreal Forests ◽  
Initial Conditions ◽  
Optimal Number ◽  
Return Rate ◽  
Thinning Intensity ◽  
Forest Carbon Storage ◽  
Large Trees ◽  
Capital Return

Two sets of initial conditions are used in the investigation of capital return rate and carbon storage in boreal forests. Firstly, a growth model is applied in young stands as early as the inventory-based model is applicable. Secondly, the growth model is applied to observed wooded stands. Four sets of thinning schedules are investigated in either case. First, the capital return rate is aspired without any restriction. Second, the number of thinnings is restricted to at most one. Third, thinnings are restricted to the removal of only trees thicker than 237 mm. Fourth, commercial thinnings are omitted. The two sets of initial conditions yield similar results. The capital return rate is a weak function of rotation age, which results in variability in the optimal number of thinnings. Reducing the number of thinnings to one increases timber stock but induces a capital return rate deficiency. The deficiency per excess volume unit is smaller if the severity of any thinning is restricted by the removal of large trees only. Omission of thinnings best applies to spruce-dominated stands with stem count less than 2000/ha. Restricted thinning intensity applies to deciduous stands and dense pine stands. The albedo effect increases the benefits of restricted thinnings and increased clearcuttings instead of contradicting the carbon storage.

scholarly journals Two Sets of Initial Conditions on Boreal Forest Carbon Storage Economics

2021 ◽  
Author(s):  
Petri P. Kärenlampi
Keyword(s):  
Carbon Storage ◽  
Growth Model ◽  
Boreal Forests ◽  
Initial Conditions ◽  
Optimal Number ◽  
Return Rate ◽  
Thinning Intensity ◽  
Forest Carbon Storage ◽  
Large Trees ◽  
Capital Return

Two sets of initial conditions are used in the investigation of capital return rate and carbon storage in boreal forests. Firstly, a growth model is applied in young stands as early as the inventory-based model is applicable. Secondly, the growth model is applied to observed wooded stands. Four sets of thinning schedules are investigated in either case. First, the capital return rate is aspired without any restriction. Second, the number of thinnings is restricted to at most one. Third, thinnings are restricted to the removal of only trees thicker than 237 mm. Fourth, commercial thinnings are omitted. The two sets of initial conditions yield similar results. The capital return rate is a weak function of rotation age, which results in variability in the optimal number of thinnings. Reducing the number of thinnings to one increases timber stock but induces a capital return rate deficiency. The deficiency per excess volume unit is smaller if the severity of any thinning is restricted by the removal of large trees only. Omission of thinnings best applies to spruce-dominated stands with stem count less than 2000/ha. Restricted thinning intensity applies to deciduous stands and dense pine stands.

scholarly journals Growth and Yield of Three Boreal Tree Species

2021 ◽  
Author(s):  
Petri P. Kärenlampi
Keyword(s):  
Risk Aversion ◽  
Carbon Storage ◽  
Growth Model ◽  
Tree Species ◽  
Return Rate ◽  
Growth And Yield ◽  
Normal Forest ◽  
Capital Return

Growth and yield of boreal tree species are discussed. A growth model is applied, along with verified yield models of sawlogs and veneer logs. Using the normal forest-principle, thinning schedules and rotation ages maximizing the estate-level capital return rate are clarified. Regeneration expenses are amortized at the end of any rotation. Consequently, capitalizations are greater and rotations longer than in recent studies. The capital return rate is a weak function of initial stem count but differs by tree species. The initial stem count strongly contributes to biomass stored in trees. The most promising way of increasing the capital return rate is the reduction of regeneration expenses. Thinnings are triggered by stand volumes of at least 200 m3/ha. The average commercial trunk volume of trees removed in thinnings always exceeds 200 liters. Risk aversion theory proposes short rotations and low stem count in seedling planting unless carbon storage compensation exists.

scholarly journals Capital Return Rate and Carbon Storage on Forest Estates of Three Boreal Tree Species

2021 ◽  
Vol 13 (12) ◽  
pp. 6675
Author(s):  
Petri P. Kärenlampi
Keyword(s):  
Risk Aversion ◽  
Carbon Storage ◽  
Growth Model ◽  
Tree Species ◽  
Return Rate ◽  
Financial Compensation ◽  
Rotation Age ◽  
Normal Forest ◽  
Capital Return

In this study, the capital return rate and carbon storage on forest estates with three boreal tree species are discussed. A growth model is applied, along with verified yield models of sawlogs and veneer logs. Using the normal forest principle, thinning schedules and rotation ages maximizing the estate-level capital return rate are clarified. Regeneration expenses are amortized at the end of any rotation. Capitalizations are greater and rotations longer than in recent studies. The capital return rate is a weak function of initial stem count and rotation age but differs by tree species. The initial stem count strongly contributes to biomass stored in trees. Omission of thinnings increases carbon storage very effectively but requires financial compensation. The most promising way of increasing the capital return rate is the reduction of regeneration expenses. Thinnings are triggered by stand volumes of at least 200 m3/ha. The average commercial trunk volume of trees removed in thinnings always exceeds 200 L. Risk aversion theory proposes short rotations and low stem count in seedling planting unless carbon storage compensation exists. Even a small carbon storage compensation justifies increased seedling counts and extended rotations.

Carbon storage in southern boreal forests following fire

1998 ◽  
Vol 13 (1-4) ◽  
pp. 119-127 ◽  
Author(s):  
Kent W. Slaughter ◽  
D. F. Grigal ◽  
L. F. Ohmann
Keyword(s):  
Carbon Storage ◽  
Boreal Forests

scholarly journals Carbon Storage Responses of Subalpine Forests to Moutain Pine Beetle Outbreaks Under Current and Altered Climate Regimes in Western North America

2008 ◽  
Vol 31 ◽  
pp. 93-96
Author(s):  
Daniel Kashain
Keyword(s):  
Carbon Storage ◽  
Mountain Pine Beetle ◽  
Carbon Dynamics ◽  
Stand Development ◽  
Climate Scenarios ◽  
Subalpine Forests ◽  
Outbreak Management ◽  
Forest Carbon Storage ◽  
Pine Beetle ◽  
Landscape Scales

Understanding how climate, disturbances, and carbon storage interact in subalpine forests is critical for assessing the role of this ecosystem in the global carbon budget under altered climate scenarios. Most research to date in western North American forests has focused on wildfire effects on carbon storage and net ecosystem productivity (NEP). The current extensive insect outbreak in this region, however, suggests that insects such as the mountain pine beetle (MPB) are an important driver of carbon dynamics and may determine whether western landscapes are carbon sinks or sources. The overall objective of this study is therefore to understand how MPB outbreaks affect forest carbon storage at stand and landscape scales under multiple climate scenarios. Specific objective include examining how carbon storage changes with stand development following beetle outbreaks, how variability in outbreak extent, frequency, and post-outbreak stand development affect landscape-scale carbon storage, and how beetle outbreaks and climate interact. This research will, for the first time, provide data documenting post-outbreak carbon dynamics under current and altered climate scenarios. These data will provide the basis for developing a carbon-based, ecological rationale for future outbreak management in western forests.

TADAM: A dynamic whole-stand approximation for the TASS growth model

2005 ◽  
Vol 81 (4) ◽  
pp. 575-581 ◽  
Author(s):  
Oscar Garcia
Keyword(s):  
Growth Model ◽  
Picea Glauca ◽  
Pinus Contorta ◽  
Initial Conditions ◽  
Growth And Yield ◽  
Planting Density ◽  
Individual Tree ◽  
Model Driven ◽  
Planning Models ◽  
Dependent Growth

Growth and yield predictions for managed even-aged stands in British Columbia are based on TASS, an individual-tree distance-dependent growth model driven by an unusually detailed description of crown development. Because of its complexity, most applications utilize previously generated stand-level yield tables rather than running TASS directly. I have developed a differential equation approximation to the stand-level dynamics predicted by TASS that mimics the aggregate behaviour with sufficient accuracy for many practical purposes. Versions of this model, called TADAM, exist for planted coastal Douglas-fir, lodgepole pine, and white spruce. TADAM can efficiently project stand development starting from any initial conditions, and subject to any combination of thinnings. Its relative simplicity makes it suitable for embedding into landscape-level planning models and other decision support systems. It has been implemented as a C function library, as an interactive simulator running on a PDA, and as an Excel spreadsheet add-in. An example of thinning and planting density optimization is briefly described. Key words: growth and yield, stand dynamics, thinning, optimization, Pinus contorta, Picea glauca

Large trees as key elements of carbon storage and dynamics after selective logging in the Eastern Amazon

2014 ◽  
Vol 318 ◽  
pp. 103-109 ◽  
Author(s):  
Plinio Sist ◽  
Lucas Mazzei ◽  
Lilian Blanc ◽  
Ervan Rutishauser
Keyword(s):  
Carbon Storage ◽  
Selective Logging ◽  
Large Trees
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