Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub

    Description

    Ecological forestry practices are designed to retain species and structural features important for maintaining ecosystem function but which may be deficient in conventionally managed stands. We used the spatially-explicit, individual tree model CANOPY to assess tradeoffs in enhanced ecological attributes vs. reductions in timber yield for a wide variety of treatments in uneven-aged, late-successional northern hardwood forests. Treatments included various combinations of (1) larger retained maximum tree diameters in the post-harvest stand, (2) permanently reserved legacy trees, (3) variable opening sizes, (4) coarse woody debris retention, (5) species harvest restrictions, and (6) occasional moderate-intensity harvests with larger openings ('irregular multi-cohort harvests'). Compared to conventional single-tree selection, reduction in simulated harvest yields varied widely from a 9% decline with 7 reserve trees/ha to a 55% reduction in treatments that retained coarse woody debris along with a maximum residual live-tree diameter of 80 cm. Despite the dominance by shade-tolerant species, simulated declines were similar in magnitude to those predicted or observed for relatively shade-intolerant conifers of the Pacific Northwest. Treatments that protected 'sensitive' species from harvest or raised the maximum residual diameter to 80 cm appeared to have the best balance between fostering ecological values of old-growth forests and moderating the impact on timber yield. These treatments produced stands meeting minimum structural criteria of old-growth forests while causing harvest declines of 27-30% compared to conventional single-tree selection. Coarse woody debris volumes were similar to those produced by the reserve-tree treatments, but the species-protection and 80 cm treatments had higher densities of large trees, and there was less reduction in yield for each large tree retained in the residual stand. Most other treatments maintained mature forest structure or stands that vacillated between mature and borderline old-growth conditions.

    Publication Notes

    • Check the Northern Research Station web site to request a printed copy of this publication.
    • Our on-line publications are scanned and captured using Adobe Acrobat.
    • During the capture process some typographical errors may occur.
    • Please contact Sharon Hobrla, shobrla@fs.fed.us if you notice any errors which make this publication unusable.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Hanson, Jacob J.; Lorimer, Craig G.; Halpin, Corey R.; Palik, Brian J. 2012. Ecological forestry in an uneven-aged, late-successional forest: Simulated effects of contrasting treatments on structure and yield. Forest Ecology and Management. 270: 94-107.

    Cited

    Google Scholar

    Keywords

    alternative forestry, coarse woody debris, multi-cohort management, old-growth restoration, reserve trees, unneven-aged management

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/40874