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
    Author(s): Justin Waskiewicz; Laura Kenefic; Aaron Weiskittel; Robert Seymour
    Date: 2013
    Source: Forest Ecology and Management. 298: 71-81.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (853.3 KB)

    Description

    Growth and yield studies of mixed-species stands lack generality, though mixture effects appear to be most likely in stands of species with contrasting traits and/or with vertical stratification. The northern red oak (Quercus rubra L.) - eastern white pine (Pinus strobus L.) forest type of the US Northeast is dominated by species of intermediate shade tolerance, often with a spatially heterogeneous lower canopy of shade-tolerant red maple (Acer rubrum L.) and eastern hemlock (Tsuga canadensis (L.) Carr.). We examined neighborhood scale plots (0.02 ha) with variable mixtures of these species and a range of age structure (44-140 years mean age) in southern Maine. Linear mixed effects regression was used to model canopy surface area, stem biomass growth, and stem biomass yield across gradients of composition. With stocking, age, and site quality held constant, more species-diverse plots had denser canopies and faster growth, but lower yield than compositionally simpler plots. For a variety of age structures, mixtures of oak and pine produced more canopy surface area and more stem biomass growth than would be expected if interspecific competition were equal to intraspecific, and more than would be expected on plots dominated by one species or the other. Lower canopy red maple and hemlock contributed to higher plot-level values of all variables in mixed plots, but there was no evidence to suggest that any species contributed to stocking without displacing other species to some degree. This study demonstrates that white pine and red oak, along with other species, can grow in fine-scale mixtures in a variety of even- and two-aged structures without sacrificing productivity, and in some conditions enhancing it.

    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

    Waskiewicz, Justin; Kenefic, Laura; Weiskittel, Aaron; Seymour, Robert. 2013. Species mixture effects in northern red oak-eastern white pine stands in Maine, USA. Forest Ecology and Management. 298: 71-81.

    Cited

    Google Scholar

    Keywords

    Overyielding, Additivity, Relative density index, Two-aged stands, Red maple, Eastern hemlock

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/45613