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Stand Initiation

Stand Initiation. Competition with different life forms. Herbs Forbs Grasses Woody shrubs. Competition with many species. “ brushy stage”. Wide range of ages. A small advantage in years can be a large advantage in competitive ability. eastern white pine (. Pinus strobus. ).

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Stand Initiation

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  1. Stand Initiation

  2. Competition with different life forms • Herbs • Forbs • Grasses • Woody shrubs

  3. Competition with many species • “brushy stage”

  4. Wide range of ages • A small advantage in years can be a large advantage in competitive ability

  5. eastern white pine ( Pinusstrobus ) Steven Katovich, USDA Forest Service, Bugwood.org

  6. Wide variation in site • Small plant size magnifies the growth effects caused by subtle variations in microenvironment • Microsite is the entire environment of the individual • Trees are in more vulnerable position • e.g. leader frost damage

  7. Stand environment changing rapidly • Site is still responding to previous disturbance • ‘assart’ effect • Nitrogen fixing herbacious vegetation

  8. Unfilled (available) growing space • Free to grow stage

  9. Harper sieve • ‘Can’t be old if you die young’ • Nature selects for competitive ability during stand initiation stage • Tree breeding programs do not – require management

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