Old-growth definitions - Ontario   Edward Frank
  Aug 30, 2006 20:22 PDT 

There has been much talk about old-growth forests, primal forests, autopotetic forests etc. Some of these discussions are presented or summarized on the ENTS website: http://www.nativetreesociety.org/oldgrowth/index_oldgrowth.htm

In practical terms we commonly think of old-growth forests as forests containing a fair percentage of mature trees that has been little impacted by human activities. These may be giant trees of the Redwoods National Park or miniature trees from atop a wind swept mountain. There are some characterisitics of typical old-growth. A nice summary of many of these characterisitics are presented in a 506 kb PDF file from the Ontario Extension Notes:


"This Extension Note provides information on the
characteristics of old-growth forests and the many species that
depend on these features for survival."

The article not only deals with the structure of old-growth forest, but natural disturbances, ecosystems, wildlife, diversity, succession and includes some excellent illustrations. I would encourage people to download and read this document.

Ed Frank
Re: Old-growth definitions   Don Bertolette
  Sep 01, 2006 19:56 PDT 

Gyde Lund has compiled a rather comprehensive collection of old-growth definitions at: