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

    The amount of wood produced by a tree each year depends on tree condition, genetic programming, and growing conditions. Wood is mature xylem, the result of inward cell divisions by the vascular cambium, the new cell generator located between the wood and the inner bark (phloem). In temperate climatic zones, where a spring and summer growing season alternates with winter dormancy, the vascular cambium usually produces a single layer or increment of wood each year. Tree rings are annual growth layers seen in cross section. In Mediterranean dry and tropical climates, rings of earlywood are formed when seasonal moisture is available and may not be strictly annual. Tropical trees also produce wood in flushes of growth but usually do not produce rings that can be easily correlated with the calendar. The formation of latewood in tropical species is sometimes associated with environmental changes, such as el Niño and la Niña cycles.

    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

    Smith, Kevin T. 2011. Tree rings and the local environment. Arborist News. 20(3): 12-15.

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/38087