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Residual Stand Damage under Different Harvesting Methods and Mitigation Strategies

Anil Raj Kizha, Evan Nahor, Noah Coogen, Libin T. Louis and Alex K. George
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Anil Raj Kizha: School of Forest Resources, University of Maine, Orono, ME 04469, USA
Evan Nahor: Thomas Donnelly Logging, New York, NY 12847, USA
Noah Coogen: LandVest Timberland, Jackman, ME 04945, USA
Libin T. Louis: School of Forest Resources, University of Maine, Orono, ME 04469, USA
Alex K. George: School of Forest Resources, University of Maine, Orono, ME 04469, USA

Sustainability, 2021, vol. 13, issue 14, 1-19

Abstract: A major component of sustainable forest management are the stands left behind after the logging operation. Large mechanized harvesting equipment involved in current forest management can inflict damage on residual trees; and can pose a risk of mortality from diseases, natural calamities, and/or degrade future economic value. The primary objective of this study was to evaluate the residual stand damage under different harvesting methods and silvicultural prescriptions i.e., crop tree release (CTR), diameter limit cut (DLC), and overstory removal (OSR). The second objective was to evaluate the intensity and frequency of damage occurring on the bole, canopy, and root at tree and stand level. The third objective was to document strategies adopted globally to minimize stand damage due to timber harvesting. Five harvest blocks implementing three silvicultural prescriptions, were selected as the treatments across two different industrial timberlands in central and northern Maine (Study Site (SS) I and II, respectively). A hybrid cut-to-length (Hyb CTL) and whole-tree (WT) harvesting method were employed for conducting the harvest in SS I and II, respectively. Systematic transect sampling was employed to collect information on type, frequency, and intensity of damages. The inventory captured 41 and 8 damaged trees per hectare with 62 and 22 damages per hectare from SS I and SS II respectively. Bole damage was the most frequent damage across all treatments. The Hyb CTL had lower damage density (damage per ha) and severity compared to WT. The average number of trees damaged per ha was higher for CTR prescriptions compared to DLC. There were no significant differences in the height of the damages from the ground level between treatments within each study site; however, there was a significant difference between the study sites. Species damaged was directly related to the residual trees left behind and was dominated by American beech, yellow birch, sugar maple, and eastern hemlock. Finally, the study provides strategies that can be adopted at different forest managerial phases to mitigate residual stand damage.

Keywords: forest operations; forest management; partial harvest; silvicultural prescription; timber harvesting; tree injury (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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