Journal Paper (peer reviewed)

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Debarking Wood Losses and Chip Quality of Deadwood

Problem Addressed: Losses of commercially valuatble softwood timber, particularly of white spruce and balsam fir
Goal(s)/Objective(s): Evaluate losses of softwoods due to spruce budworm as a function of the time since death
Views: 1085
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Documentation of Red Spruce Growth Decline

Goal(s)/Objective(s): A study to determine whether red spruce is declining in growth over much of its geographic range and if so, when the decline may have begun
Key Findings: The decline in growth of red spruce previously reported only for isolated locations is occurring throughout a sizable portion of the geographic region.
Views: 1138
Downloads: 1
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Effect of Pesticides on Cholinesterase from Aquatic Species: Crayfish, Trout and Fiddler Crab

Problem Addressed: Use of pesticides and the development of quantitative assays for low concentrations of these pesticides
Key Findings: Nineteen pesticides were tested for inhibition of cholinesterase activity derived from trout brain, crayfish nervous system and whole fiddler crabs. Inhibition by low concentrations of a few of these pesticides permitted a very sensitive and selective assay. Chlorinated pesticides as a class showed little inhibitory effect on trout and crab cholinesterase. Carbamates strongly inhibit all three enzymes.
Views: 983
Downloads: 0
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Food Consumption and Utilization by 6th-Instar Larvae of Spruce Budworm, Choristoneura fumiferana: a Comparison on Three Picea (Spruce) Species

Problem Addressed: Effects of tree species, shoot age, and sex of larvae on food consumption and utilization
Key Findings: Importance of of considering sex of the larvae as an important variable in food consumption studies on spruce budworm
Views: 903
Downloads: 1
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Carbamate Bioassay Using Daphnia magna

Problem Addressed: Carbamate insecticides in fruits and vegetable crops.
Goal(s)/Objective(s): To develop a device to determine insecticides in fruit and vegetable crops.
Views: 2213
Downloads: 0
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Applying a Spruce Budworm Decision Support System to Maine: Projecting Spruce-Fir Volume Impacts under Alternative Management and Outbreak Scenarios

Problem Addressed: Spruce Budworm
Goal(s)/Objective(s): Implement the Spruce Budworm Decision Support System
Key Findings: Statewide analysis suggested that over 4 million ha of Maine's forest are vulnerable to the budworm.
Views: 1870
Downloads: 2
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Long-term spatial and structural dynamics in Acadian mixedwood stands managed under various silvicultural systems

Problem Addressed: Differences in spatial pattern, species mingling, height differentiation, and relative stand complexity index (rSCI).
Goal(s)/Objective(s): To determine differences in spatial pattern, species mingling, height differentiation, and relative stand complexity index (rSCI) due to five treatments: commercial clear-cutting, fixed diameter-limit, 5 year single-tree selection, three-stage shelterwood (both with and without precommercial thinning), and unharvested natural areas.
Key Findings: Precommercial thinning in a shelterwood treated stand generally increased species mingling, height differentiation, and rSCI. Two untreated natural areas exhibited divergent pathways of structural development. Dynamics in uneven-aged selection treatments more closely resembled that of the untreated natural areas than did the shelterwood, commercial clearcut, or fixed diameter-limit treatments.
Views: 1828
Downloads: 1
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Nutrient Concentration of Down Woody Debris in Mixedwood Forests in Central Maine, USA

Problem Addressed: Nutrient concentrations pre- and post-harvest pool sizes across down woody debris decay.
Goal(s)/Objective(s): To determine the nutrient concentrations
Key Findings: Softwoods generally had lower nutrient concentrations and higher C:N-ratios than hardwoods; N:P-ratios did not differ between hardwoods and softwoods.
Views: 1877
Downloads: 3
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Influence of harvest gaps and coarse woody material on click beetles (Coleoptera: Elateridae) in Maine’s Acadian forest

Goal(s)/Objective(s): To examine how the species richness, abundance, diversity, and assemblage of similarity of click beetles inhabiting coarse woody material were affected by harvesting and coarse woody material characteristics.
Key Findings: Small (less than 0.2 ha) harvest gaps with living trees retained throughout the gap can maintain click beetle assemblages similar to that of an unharvested forest.
Views: 1897
Downloads: 0
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