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Maine Forest and Forest Products Survey – Preliminary Findings

Problem Addressed: How do Maine residents view forests, forestry, and the emerging bioproducts industry.

Goal(s)/Objective(s): Explore Maine resident views toward forest conditions, practices, and new forest uses for bioenergy and other products.

Key Findings: Forest sustainability is a key concern both state-wide and in mill towns.

Recommendation: Maine residents express strong support for forestry and forest products. Sustainable harvesting is a precondition, as is stakeholder engagement in the development of new forest-based processing technologies.

Downloads: 5

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Practical economics of forest ecosystem management: case of Ukrainian Carpathians

Problem Addressed: Longterm planning issues in forest management in Carpathians

Goal(s)/Objective(s): Enrich discussion of issues not addressed in recent formal planning

Key Findings: Planning systems need major improvements; financial soundness of "back to Nature" not certain

Recommendation: Assess practical economic issues more deeply; consider market context

Downloads: 0

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Influence of partial harvesting and site factors on the abundance and composition of natural regeneration in the Acadian Forest of Maine, USA

Problem Addressed: Understanding the factors regulating the composition and abundance of natural regeneration in Acadian forest ecosystems.

Goal(s)/Objective(s): Importance of silvicultural treatment and site factors in structuring the species composition and abundance of natural regeneration.

Key Findings: Overstory and understory vegetation exhibit greater control over regeneration patterns than substrate and soil attributes, or silvicultural treatment, in partially harvested mixedwood stands.

Downloads: 3

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Long-term compositional dynamics of Acadian mixedwood stands under different silvicultural regimes

Problem Addressed: Forest response to natural disturbances and silvicultural treatments over time

Goal(s)/Objective(s): Tree species composition versus initial composition and harvest disturbance history after 5 decades of silvicultural treatments

Key Findings: Higher harvest intensity increases dominance by early successional species; lighter harvests maintain dominance by late successional species

Recommendation: Sustaining cedar recruitment may require additional silvicultural treatments

Downloads: 4

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Factors affecting species richness of tree regeneration in mixed-wood stands of central Maine

Problem Addressed: Within-stand spatial variability and tree regeneration

Goal(s)/Objective(s): Species richness of tree regeneration in response to smallscale ecological gradients, and effect of Abies balsamea abundance on species richness of other tree regeneration

Key Findings: Negative associations with A. balsamea regeneration density; large regeneration and overstorey basal area. Positive associations overstorey basal area; small and large regeneration and canopy transmittance.

Recommendation: Tree species diversity in Acadian mixed-wood stands may not be achievable through the use of gap-harvesting alone if the density of understorey Abies balsamea is not reduced

Downloads: 2

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Developing optimal commercial thinning prescriptions: A new graphical approach

Problem Addressed: Thinning prescriptions for intensive management of stand density

Goal(s)/Objective(s): Develop an analytical framework to facilitate the application of existing stocking diagrams and stand-growth simulators in formulating density-management regimes

Key Findings: Graphical techniques such as ThinME allow forest managers to effectively explore a variety of commercial thinning prescriptions.

Downloads: 6

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Forty years of spruce–fir stand development following herbicide application and precommercial thinning in central Maine, USA

Problem Addressed: Long-term stand dynamics for northern forests

Goal(s)/Objective(s): Evaluate the long-term effects of herbicide release and PCT on stand composition and structure; test assumptions about the effects on mixedwood stands

Key Findings: Early herbicide application created softwood-dominated mixedwood stands over the long term; PCT more than doubled merchantable softwood volume

Recommendation: Early PCT dramatically influences the development of spruce-fir stands

Downloads: 4

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Long-term response of spruce–fir stands to herbicide and precommercial thinning: observed and projected growth, yield, and financial returns in central Maine, USA

Problem Addressed: Long-term growth and yield responses from controlled experiments that include both herbicide application and precommercial thinning.

Goal(s)/Objective(s): Use 40-year growth and yield responses of spruce–fir stands to combinations of early herbicide and PCT to calibrate the Forest Vegetation Simulator (Northeast Variant).

Key Findings: Highest stumpage values resulted from combined herbicide and PCT treatments, followed by PCT-only and then herbicide-only.

Recommendation: Good financial returns are possible over the long-term from early investments in herbicide and PCT treatments in Maine spruce–fir stands.

Downloads: 6

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Assessing the Feasibility of Low-Density LiDAR for Stand Inventory Attribute Predictions in Complex and Managed Forests of Northern Maine, USA

Problem Addressed: Applicability of using a low-density discrete-return LiDAR for forest management.

Goal(s)/Objective(s): Evaluate LiDAR for predicting maximum tree height, stem density, basal area, quadratic mean diameter, and total volume.

Key Findings: Low density LiDAR was able to capture variability but tended to underestimate maximum tree height and volume; accuracy of volume prediction was sensitive to the plot type.

Recommendation: Use of LiDAR-based inventory attribute predictions is a valuable option for achieving efficient and effective forest assessment.

Downloads: 3

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Early stand production of hybrid poplar and white spruce in mixed and monospecific plantations in eastern Maine

Problem Addressed: Potential benefits of increasing intensity of silvicultural practices on Maine's forestlands.

Goal(s)/Objective(s): Compare early growth of pure white spruce, pure hybrid poplar, and white spruce-hybrid poplar mixed-species plantations on a typical reforestation site in eastern Maine.

Key Findings: Three years post planting, hybrid poplar height and ground line diameter growth rates began to diverge among clones; by 6 years, the Populus nigra x Populus maximowiczii clone clearly outperformed three other Populus spp. clones both in pure stands and in mixtures with white spruce. In mixture, yield of white spruce declined as yield of hybrid poplar increased.

Recommendation: Forest management in northeastern North America could benefit from increasing intensities of silviculture and establishing more plantations.

Downloads: 2

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