Capacity for Recovery, Influence of Commercial Thinning, & Resistance to Defoliation in Spruce-Fir Forests
Problem Addressed: Defoliation from spruce budworm
Goal(s)/Objective(s): Assess the effects of commercial thinning on non-structural carbohydrates and tannic acid equivalence concentration
- Langley, C. J.
University of Maine
Maine's forest industry is expecting the next spruce budworm outbreak to occur in the near future, as the outbreak in Quebec and New Brunswick continues to spread. Two strategies for response are considered: tolerance (non-structural carbohydrates [NSC]) and defense (tannic acid equivalence [TAE]). NSC provide the energy needed to withstand periods of stress. The study looks at whether thinning treatments have the potential to contribute to increased allocation to NSC by maintaining growth rates and increase the capacity of recovery following defoliation. Further, the effect of artificial defoliation treatments on the concentration of TAE was tested.
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