Growth and yield modelling for optimal multi-objective forest management of eastern Mediterranean Pinus brutia

Carbon (C) dynamics and forest management have become integrated in recent years, largely due to the Kyoto Protocol stipulating that forest C changes may be accountable in an emissions framework. A C stock modeling framework for forest managers is introduced in this paper. Empirical growth and yield models are used to develop sustainable timber supply for forest companies. These models use linear programming to solve the complex mathematical problem of timing and allocation of forest harvest and silviculture interventions. In this paper, we evaluated the effects of “business as usual”forest management versus management objectives to maximize C sequestration. Goal programming was used to minimize the deviation of two goals for C forest management: maximizing C in the forest, and maximizing the return on investment (net present value of forest timber products). Species-specific wood-to-C content conversion factors were used to parameterize the amount of C in forest stands on Canadian Forces Base Gagetown forest lands in New Brunswick, Canada. Goal programming reduced the loss of revenue associated with increasing C stocks in the forest. Partial harvesting and high valued end-products tended to increase C stocks and provided a higher return on investment in the simulations. Key words: Carbon stock modeling framework, forest, goal programming, partial harvesting, timber supply

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Männi-, kuuse- ja kasepuistute majandamise tasuvus lühikese raieringi korral / Profitability analysis of short rotations in Scots pine, Norway spruce and silver birch stands

Forestry Studies / Metsanduslikud Uurimused ◽

10.2478/v10132-011-0093-7 ◽

2011 ◽

Vol 54 (1) ◽

pp. 28-36 ◽

Cited By ~ 1

Author(s):

Henn Korjus ◽

Priit Põllumäe ◽

Siim Rool

Keyword(s):

Forest Management ◽

Norway Spruce ◽

Scots Pine ◽

Simulation Software ◽

Forest Growth ◽

Silver Birch ◽

Growth And Yield ◽

Rotation Length ◽

Profitability Analysis ◽

Optimal Rotation

Abstract. Estonian forest management is based traditionally on long rotations. Recent trends in wood industry and wood consumption promote also production of small-size timber for bioenergy and timber products. This opens a discussion about shorter rotations and intensive forest management again in Estonia. In current study, profitability of Scots pine, Norway spruce and silver birch stand management on fertile soils was analyzed according to three different rotation lengths: traditional long rotation, short rotation and economically optimal rotation according Finnish TAPIO rules. Stand simulation software MOTTI was used to simulate and optimize forest growth and management. Simulation results were compared with actual data on forest growth and yield in Estonia. Economically optimal rotations were for Scots pine stand 58 years, Norway spruce stand 53 years and silver birch stand 41 years. Short and optimal rotation length enable 5.9-6.5% profitability for forest owner, traditional long rotation length enables 4.8-5.4% profitability. Rotation forestry is challenging task. Based on our analysis, it is likely that applied practices can intensify wood production and reduce forest management risks. However, theoretical approach is not enough for assessing practical feasibility of short rotations. Thus further studies and experiments are needed for careful analysis and recommendations

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Integrating Wildlife into the Managed Forest

The Forestry Chronicle ◽

10.5558/tfc61146-2 ◽

1985 ◽

Vol 61 (2) ◽

pp. 146-149

Author(s):

Hal Salwasser

Keyword(s):

Forest Management ◽

Management Plan ◽

Wildlife Habitat ◽

Growth And Yield ◽

Multiple Use ◽

Vegetation Growth ◽

Resource Managers ◽

Coordination Work ◽

The Right ◽

Effective Use

Integrating wildlife habitat concerns into multiple-use forest management requires four things: 1) the right attitude, 2) a process for systematic resource coordination, 3) models that relate forest conditions to wildlife outputs, and 4) the effective use of monitoring to support an adaptive management strategy. These four things reflect that resource managers must first want to make forestry-wildlife coordination work, that they need a mechanism for doing it, that they need habitat criteria for meeting wildlife goals, and that we only know enough at this time to get pointed in the right direction.Comprehensive goals for timber and wildlife are set early in successful forestry-wildlife integration. The goals provide for maintaining habitat and wildlife diversity while simultaneously producing consumable surpluses of timber and game in relation to demands for those products. Comprehensive inventories and vegetation growth and yield models are used to analyze the current management situation and show the need for actions to meet goals. The wildlife yield models are species-habitat relationships functions that relate habitat conditions to wildlife outputs by species. The management plan developed constitutes a coordinated set of resource objectives and the schedule of practices that will achieve them in an efficient way. Monitoring the effects of the practices is used to learn whether assumptions and models used in planning need to be revised, and whether the course of management needs to be adjusted to meet the goals. Key words: Forest management, Wildlife management, integration, Wildlife habitat, Multiple use planning.

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Intra-specific differences in allometric equations for aboveground biomass of eastern Mediterranean Pinus brutia

Annals of Forest Science ◽

10.1007/s13595-013-0334-4 ◽

2013 ◽

Vol 71 (1) ◽

pp. 101-112 ◽

Cited By ~ 16

Author(s):

Sergio de-Miguel ◽

Timo Pukkala ◽

Nabil Assaf ◽

Zuheir Shater

Keyword(s):

Aboveground Biomass ◽

Eastern Mediterranean ◽

Allometric Equations ◽

Pinus Brutia

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Forest carbon accounting at the operational scale

The Forestry Chronicle ◽

10.5558/tfc78672-5 ◽

2002 ◽

Vol 78 (5) ◽

pp. 672-679 ◽

Cited By ~ 54

Author(s):

Werner A Kurz ◽

Mike Apps ◽

Ed Banfield ◽

Graham Stinson

Keyword(s):

Technology Transfer ◽

Forest Management ◽

Greenhouse Gas Emission ◽

Carbon Accounting ◽

Growth And Yield ◽

Transfer Program ◽

C Cycle ◽

C Stocks ◽

Forest C ◽

Forest Managers

Canadas forests play an important role in the global carbon (C) cycle. Forest management activities, implemented at the operational scale, can have a significant impact on the C budget of Canadas forests. With the increasing national and international recognition that forest management activities can contribute to national C sources and sinks, forest managers could benefit from having a scientifically credible tool to assess the potential impacts of alternate management activities on the C stocks and stock changes on their land base. Such a tool must incorporate the best available science, be compliant with evolving international accounting rules and have enough flexibility to address the types of scenarios and management questions that are of interest to forest managers. To be cost effective and efficient for use by forest managers, the tool should make use of existing information on inventory, growth and yield, and disturbances that their analysts routinely use in their forest management planning activities. The readily available information must be augmented with additional data and modelling to estimate changes in those C pools that are not commonly included in forest inventories, such as carbon in the dead organic matter associated with litter, coarse woody debris and soil C. Building upon the past decade of work in the development and application of the C Budget Model of the Canadian Forest Sector (CBM-CFS2), the Canadian Forest Service C Accounting Team is now working with the Model Forest Network to develop, test and deliver an operational scale C accounting tool and its supporting databases with regional parameter values. When fully developed (2004), the operational model will be made available without charge to anyone interested in using it to estimate landscape level forest C stocks and C stock changes. Expertise developed within the extensive network of Model Forests and their partners in Canada will facilitate technology transfer and training of the larger user community. The tools and the technology transfer program will empower forest managers to include considerations of the impacts of the planned activities on forest C stocks. This will increase the potential use of forests and forest management activities in contributing towards a greenhouse gas emission reduction strategy. Key words: carbon cycle, carbon accounting, forest management, operational scale, land-use change, model forests, CBM-CFS2

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Modeling dominant height growth using permanent plot data for Pinus brutia stands in the Eastern Mediterranean region

Forest Systems ◽

10.5424/fs/2021301-17687 ◽

2021 ◽

Vol 30 (1) ◽

pp. eSC03

Author(s):

Tammam Suliman ◽

Uta Berger ◽

Marieke Van der Maaten-Theunissen ◽

Ernst Van der Maaten ◽

Wael Ali

Keyword(s):

Mediterranean Region ◽

Eastern Mediterranean ◽

Eastern Mediterranean Region ◽

Site Index ◽

Permanent Plots ◽

Stand Age ◽

Pinus Brutia ◽

Dominant Height ◽

Algebraic Difference ◽

Generalized Algebraic Difference Approach

Aim of the study: At current, forest management in the Eastern Mediterranean region is largely based on experience rather than on management plans. To support the development of such plans, this study develops and compares site index equations for pure even-aged Pinus brutia stands in Syria using base-age invariant techniques that realistically describe dominant height growth.Materials and methods: Data on top height and stand age were obtained in 2008 and 2016 from 80 permanent plots capturing the whole range of variation in site conditions, stand age and stand density. Both the Algebraic Difference Approach (ADA) and the Generalized Algebraic Difference Approach (GADA) were used to fit eight generalized algebraic difference equations in order to identify the one which describes the data best. For this, 61 permanent plots were used for model calibration and 19 plots for validation.Main results: According to both biological plausibility and model accuracy, the so-called Sloboda equation based on the GADA approach showed the best performance.Research highlights: The study provides a solid classification and comparison of Pinus brutia stands growing in the Eastern Mediterranean region and can thus be used to support sustainable forest management planning.Keywords: site index; Generalized Algebraic Difference Approach (GADA); Sloboda equation.

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Meta-Modelling to Quantify Yields of White Spruce and Hybrid Spruce Provenances in the Canadian Boreal Forest

Forests ◽

10.3390/f11060609 ◽

2020 ◽

Vol 11 (6) ◽

pp. 609

Author(s):

Suborna Ahmed ◽

Valerie LeMay ◽

Alvin Yanchuk ◽

Andrew Robinson ◽

Peter Marshall ◽

...

Keyword(s):

Forest Management ◽

Picea Glauca ◽

Tree Improvement ◽

Growth And Yield ◽

Mean Annual Temperature ◽

Average Height ◽

Improvement Program ◽

Meta Data ◽

Improvement Programs ◽

Hybrid Spruce

Tree improvement programs can improve forest management by increasing timber yields in some areas, thereby facilitating conservation of other forest lands. In this study, we used a meta-analytic approach to quantify yields of alternative white (Picea glauca (Moench) Voss) and hybrid spruce (Picea engelmannii Parry ex Engelmann x Picea glauca (Moench) Voss) stocks across planting sites in the boreal and hemiboreal forests of Canada. We extracted meta-data from published tree improvement program results for five Canadian provinces covering 38 planting sites and 330 white and hybrid spruce provenances. Using these meta-data and a random-coefficients nonlinear mixed-effects modelling approach, we modelled average height over time trajectories for varying planting site characteristics, as well as climate transfer distances between planting sites and provenances. Climatic transfer distances had strong effects on the height trajectory parameters. In particular, the asymptote parameter had a nonlinear increasing trend with planting site versus provenance mean annual temperature differences. We incorporated the height trajectory meta-analysis model into an existing growth and yield model to predict volume yields. Overall, this research provides a mechanism to quantify yields of alternative provenances at a particular planting site, as a component of decision support models for evaluating evaluate forest management investment into improved planting stocks alternatives under current and possible future climates.

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Status of growth and yield research: 1991 joint technical session of forest measurements, tree improvement and silviculture, and forest management working groups

The Forestry Chronicle ◽

10.5558/tfc68342-3 ◽

1992 ◽

Vol 68 (3) ◽

pp. 342-348

Author(s):

Valerie M. LeMay ◽

Peter L. Marshall ◽

Richard Greenwood ◽

Margaret Penner ◽

Doug Walker

Keyword(s):

Forest Management ◽

Tree Improvement ◽

Growth And Yield ◽

Technical Session ◽

Working Groups

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Mediterranean Islands Hosting Marginal and Peripheral Forest Tree Populations: The Case of Pinus brutia Ten. in Cyprus

Forests ◽

10.3390/f9090514 ◽

2018 ◽

Vol 9 (9) ◽

pp. 514 ◽

Cited By ~ 4

Author(s):

Nicolas-George Eliades ◽

Filippos Aravanopoulos ◽

Andreas Christou

Keyword(s):

Genetic Diversity ◽

Eastern Mediterranean ◽

Rapid Change ◽

Central Area ◽

Forest Tree ◽

Middle Level ◽

Mediterranean Islands ◽

High Genetic Diversity ◽

Pinus Brutia ◽

Marginal Forest

Mediterranean islands have served as important Tertiary and glacial refuges, hosting important peripheral and ecologically marginal forest tree populations. These populations, presumably harboring unique gene complexes, are particularly interesting in the context of climate change. Pinus brutia Ten. is widespread in the eastern Mediterranean Basin and in Cyprus in particular it is the most common tree species. This study evaluated genetic patterns and morphoanatomical local adaptation along the species geographical distribution and altitudinal range in Cyprus. Analysis showed that the Cyprus population of P. brutia is a peripheral population with high genetic diversity, comprised of different subpopulations. Evidence suggests the presence of ongoing dynamic evolutionary processes among the different subpopulations, while the most relic and isolated subpopulations exhibited a decreased genetic diversity compared to the most compact subpopulations in the central area of the island. These results could be the consequence of the small size and prolonged isolation of the former. Comparing populations along an altitude gradient, higher genetic diversity was detected at the middle level. The phenotypic plasticity observed is particularly important for the adaptive potential of P. brutia in an island environment, since it allows rapid change in local environmental conditions.

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