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Modelling Primary Branch Frequency and Size for Five Conifer Species in Maine, USA

Problem Addressed: Crown Structure

Goal(s)/Objective(s): Test for species differences in maximum branch diameter profile, branch density, and relative branch diameter distribution.

Key Findings: There is a range of variability in key crown structural attributes due to inherent species differences, but models fit across multiple species can perform quite well as the amount of explained variation was relatively high.

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Stand Structure and Composition 32 Years after Precommercial Thinning Treatments in a Mixed Northern Conifer Stand in Central Maine

Problem Addressed: Precommercial thinning on an even-aged northern conifer stand in Maine

Goal(s)/Objective(s): Examination of stand structure and composition 32 years after treatment.

Key Findings: Early thinning treatments were found to have long-term effects on key stand attributes, even more than 30 years after treatment in areas with mixed species composition and moderate site potential.

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Thoughts on Soils and Climate Change: Paradigms and Pragmatism

Problem Addressed: Shifting climatology alters the taxonomy of some soils across the landscape.

Goal(s)/Objective(s): Highlight the increased value of soils information across various sectors in climate adaptation and mitigation, while challenging the management of soils information to be accessible and accurate in a changing climatology.

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Northern tamarack: unused resource?

Problem Addressed: Describes extent of tamarack in North, and potential market options

Goal(s)/Objective(s): Assess area and volume of tamarack and describe markets

Key Findings: Resource is not large but generally underutilized; tamarack area once much larger

Recommendation: Tamarack suited to uses in the round, small mills, small logging operations

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Fire trends, Northern Forest

Problem Addressed: Longterm trend in fire in NY, VT, NH, ME

Goal(s)/Objective(s): Describe longterm trends

Key Findings: Area burned at historic lows; fire numbers not declining. Response capacity eroding

Recommendation: Don't assume the fire issue has gone away.

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Fire trends southern New England

Problem Addressed: Describe trends in forest fire occurrence on region

Goal(s)/Objective(s): Better inform the public and agencies on longterm trends

Key Findings: Fires much better controlled than in past; fire weather has been favorable, values at risk far higher

Recommendation: Don't assume the fire problem has gone away.

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Fire trends Lake States

Problem Addressed: Is there a trend in fire occurrence in the Lake States?

Goal(s)/Objective(s): Describe trends in fire numbers and area burned in MI, WI, MN

Key Findings: Fire occurrence data are weak; whether a trend depends on period analyzed

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Spruce budworm returns to Northeast

Problem Addressed: Current status of Spruce fir forests in NY, VT, NH, and ME

Goal(s)/Objective(s): DEscribe extent and condition of region's spruce fir forests and timber supply

Key Findings: Most of the spruce fir area is in Maine; an large surplus is in the 21-40 yr age class

Recommendation: Land managers need to prepare in advance for possible budworm outbreak

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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.

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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

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