Key Findings: Efforts to produce resistant forests of more diversified age-classes will more likely succeed as the areas under management become larger.
Key Findings: Fir, the primary host of the budworm, is here to stay and while we may reduce its representation in our stands, it will always be sufficient to provide a food source for the budworm; silvicultural practices may reduce the losses from budworm attack, and can reduce the impact of the budworm on our total production by promoting rapid growth in new stands.
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.
Goal(s)/Objective(s): Snags in various stages of decay were inventoried across eight silvicultural treatments in eastern spruce–fir forests in central Maine nearly 60 years after treatments were initiated. Several modeling strategies were developed to estimate number of snags per hectare in various stages of decay.
Key Findings: Help with reducing disparities between observed and modeled snag stocking levels and further understanding of relationships between live and standing dead trees inherent to eastern spruce-fir forests.