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Comparing Strategies for Modeling Individual-Tree Height and Height-to-Crown Base Increment in Mixed-Species Acadian Forests of Northeastern North America

Problem Addressed: Lack of prediction methods for annual tree height increment and height-to-crown base increment.
Key Findings: There is an advantage to incorporating species as a random effect in individual-tree models and the effectiveness of modeling tree crown recession directly for application in mixed-species forest growth and yield models was demonstrated.
Views: 2022
Downloads: 0
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Irland relics on Budworm

Problem Addressed: Various aspects of the spruce budworm challenge to Maine's forests
Goal(s)/Objective(s): This is a reading list of obscure items for anyone interested. Few are on Web.
Key Findings: Various summaries of the last budworm outbreak and lessons learned.
Views: 2191
Downloads: 9
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Brown needles Lessons from SBW Outbreak of 70’s and 80’s

Problem Addressed: Lessons learned.
Goal(s)/Objective(s): Informal summary on issues.
Key Findings: Forest, industry, and pest control options have all changed. WE have one well observed outbreak but next one may be different.
Recommendation: Continue the march already begun by State with intense early monitoring, and industry and University with planning, education, and information.
Views: 2106
Downloads: 5
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Species Differences in Total and Vertical Distribution of Branch- and Tree-Level Leaf Area for the Five Primary Conifer Species in Maine, USA

Problem Addressed: Distribution of Leaf Area
Goal(s)/Objective(s): Examine species variation in total and vertical distribution of projected leaf area at the individual branch- and tree-levels.
Key Findings: Differences in total and vertical distribution of leaf area exist between species, but significant amounts of their variation are largely accounted for by bole and crown size.
Views: 2107
Downloads: 0
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MODELING BIOMASS AND NUTRIENT DYNAMICS IN MAINE BALSAM FIR STANDS: INFLUENCE OF INCREASED SILVICULTURAL INTENSITY ON FOREST SUSTAINABILITY

Problem Addressed: Intensive forest harvesting impacts on site productivity.
Key Findings: This analysis indicated that relative risk of depletion of plant-available nutrients was Ca>K>P>Mg. If N remains the most commonly deficient nutrient in forests of the region today, then accelerated rates of N removal were also a potential concern.
Recommendation: Evaluate site conditions and soil suitability as part of intensive harvesting prescriptions.
Views: 2511
Downloads: 6
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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.
Views: 2464
Downloads: 5
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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.
Views: 2305
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
Views: 2315
Downloads: 4
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