Forest Ecology Documents

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Effects of multiple interacting disturbances and salvage logging on forest carbon stocks

Problem Addressed: Multiple disturbances or post-disturbance forest management activities on ecosystem carbon stocks.
Goal(s)/Objective(s): Quantify how forest carbon stocks respond to stand-replacing blowdown and wildfire
Key Findings: Potential increases in multiple disturbance events may represent a challenge for sustaining ecosystem carbon stocks
Views: 912
Downloads: 1
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Ecological Impacts of Energy-Wood Harvests: Lessons from Whole-Tree Harvesting and Natural Disturbance

Problem Addressed: Expected impacts of even-aged energy-wood harvesting (EWH) on ecosystem structure and function
Goal(s)/Objective(s): Summarize existing knowledge to anticipate the impacts of EWH on carbon stocks, nutrients, terrestrial biodiversity, and associated aquatic ecosystems.
Key Findings: Harvesting impacts and forest sustainablitliy have relevance for examining potential consequences for biodiversity and aquatic ecosystems
Recommendation: Data is needed to address the longterm ecosystem sustainability of EWH and inform decisions concerning the acceptability of forest-derived wood as an important energy source worldwide
Views: 1058
Downloads: 4
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Natural disturbance in an old-growth landscape of northern Maine, USA

Problem Addressed: Forest dynamics and succession in old-growth stand in northern Maine.
Key Findings: The abundance of shade-tolerant saplings, coupled with the absence of stand-replacing disturbance, has maintained canopy dominance by shade-tolerant species.
Views: 994
Downloads: 2
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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: 1139
Downloads: 0
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Dendrochronological reconstruction of spruce budworm outbreaks in northern Maine, USA

Problem Addressed: Detection of major spruce budworm outbreaks in Maine
Goal(s)/Objective(s): Reconstruct the history of major spruce budworm outbreaks in northern interior Maine using host–nonhost dendrochronological analyses, contrast the outbreaks detected in this region to those of eastern Canada; and evaluate the efficacy of using radial growth patterns of small spruce trees for the purpose of detecting outbreaks.
Key Findings: Small-diameter, slow-growing red spruces clearly express the typical budworm signal once ring-width data have been properly standardized.
Views: 1130
Downloads: 0
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Effects of thinning on drought vulnerability and climate response in north temperate forest ecosystems

Problem Addressed: Do density reductions confer greater resistance and/or resilience to droughts?
Goal(s)/Objective(s): To assess how long-term forest density management reduced drought vulnerability.
Key Findings: Thinning generally enhanced drought resistance and resilience; however, this relationship showed a pronounced reversal over time in stands maintained at lower tree densities
Recommendation: Results confirm the potential of density management to moderate drought impacts on growth
Views: 928
Downloads: 0
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Identifying growth releases in dendrochronological studies of forest disturbance

Problem Addressed: Measuring growth releases for reconstructing historical disturbances
Goal(s)/Objective(s): Provide an alternative method for testing growth releases
Key Findings: This absolute-increase method has convenient properties that remedy the shortcomings of the percent-increase method.
Recommendation: No arithmetic method is likely to obviate the need to visually inspect each tree-ring series.
Views: 989
Downloads: 1
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