Forest Models/Measurements Documents

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Agent-Based Modeling of Harvest Decisions by Small Scale Forest Landowners in Maine, USA

Problem Addressed: Small-scale forests and decision-making processes, reactions to policy, and combined impacts on ecosystems.
Goal(s)/Objective(s): Develop an agent-based model experiment to model timber harvesting in Maine, USA.
Key Findings: Presents baseline simulation results and compare the effect of a social change and a biophysical change on the system.
Views: 1437
Downloads: 0
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A History of Recent Infestations of the Spruce Budworm in Northwestern Ontario, and an Estimate of Resultant Timber Losses

Problem Addressed: Spruce Budworm infestations in the Lac Seul and Lake Nipigon regions of northwestern Ontario
Goal(s)/Objective(s): Make deductions which indicate when the first severe defoliation occurred.
Key Findings: The potential for future losses within the areas affected by 1955 is almost double the amount destroyed.
Views: 1252
Downloads: 3
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A Review of Entomological Survey and Assessment Techniques used in Regional Spruce Budworm, Choristoneura fumiferana (Clem.) Surveys and in the Assessment of Operational Spray Programs

Problem Addressed: Spruce Budworm
Goal(s)/Objective(s): Ensure on a technical level the general principles of survey and assessment techniques were understood and evaluated in a manner unlikely to cause problems between jurisdictions, and create a sufficient standardization of techniques to allow a realistic comparison of results across jurisdictions.
Key Findings: Differences which existed were only minor and usually reflected modifications to suit local conditions or needs and standardization seemed unnecessary.
Views: 1352
Downloads: 1
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Disturbance Dynamics of Old-Growth Picea rubens Forests of Northern Maine

Problem Addressed: How spatial and temporal aspects of past disturbances shaped the current structure and composition of old-growth Picea rubens forests
Goal(s)/Objective(s): Linking spatial data and temporal data to reconstruct the location and size of former canopy gaps back to 1920, and determine a more general disturbance as far back as 1740.
Key Findings: Persistence of Picea rubens is attributed to the abundance of advance regeneration, the ability to endure suppression and respond favorably to release, and longevity relative to ecologically similar species.
Views: 1324
Downloads: 0
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Stand and Cohort Structures of Old-Growth Pinus Resinosa-dominated Forests of Northern Minnesota, USA

Problem Addressed: Range of variability in stand and age structure of old-growth Pinus resinosa
Goal(s)/Objective(s): Use dendrochronological data to map stem locations and reconstruct stand and age structures prior to European settlement of the region.
Key Findings: Pre-settlement forests more complex than those of the single-cohort, post-stand-replacing-fire model that has guided regional forest management.
Views: 1323
Downloads: 1
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Net Carbon Flux of Dead Wood in Forests of the Eastern US

Problem Addressed: How to assess downed dead wood (DDW) carbon net flux
Goal(s)/Objective(s): Explore DDW carbon net flux in relation to other woody C pools and site/stand attributes
Key Findings: Diversity of ecosystem and number of organisms contribute to the complex dynamics of DDW carbon flux.
Recommendation: Assessing scale and timeframes of DDW C net flux to the atmosphere and other pools would benefit stand-level management.
Views: 1467
Downloads: 2
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Woody Debris Volume Depletion Through Decay: Implications for Biomass and Carbon Accounting

Problem Addressed: Underestimation of decay rates
Goal(s)/Objective(s): Develop method for estimating changes in log volume through time
Key Findings: Decaying logs have a collapse ratio that can serve as a surrogate for the volume remaining
Recommendation: Accounting for log volume depletion improves biomass-loss and carbon-accounting methods
Views: 1441
Downloads: 4
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Refining volume estimates of down woody debris

Problem Addressed: Determine which formulae are most appropriate for use in field protocols
Goal(s)/Objective(s): Evaluate the bias, precision, and accuracy of six commonly used formulae for DWD volume estimation and to demonstrate the degree to which collapse could influence volume estimates of well-decayed DWD.
Key Findings: The conic–paraboloid formula had the lowest bias, highest precision, and greatest accuracy.
Views: 1562
Downloads: 0
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