William,
Densities vary greatly in old-growth forests, responding to the wide
variety of disturbance regimes. One of the best sources of information on the
subject is:
"Information About Old Growth for Selected Forest Type in the Eastern
United States" by the USDA Forest Service. Principal research scientists
include Lucy E. Tyrrell, Gregory J. Nowacki, and Thomas R. Crow.
From my own research, I can easily verify a wide range of densities with
the conifer stands most densely packed as Joe Zorzin points out. As a general
rule 50 to 125 trees per acre in the range of 4 inches in diameter and greater
covers the majority of old growth stands.
The person to really weigh in on the density question is Lee Frelich. Don
Bragg and Don Bertolette will also have excellent insights.
Bob
-------------- Original message --------------
From: "William Morse" <[EMAIL PROTECTED]>
>
> Hello all,
>
> I have a friend working on a project for school regarding stand
> densities/ trees per acre. Does anyone have any information regarding
> tree spacing or density in unmanaged/old growth forests, particularly
> broadleaf and mixed forests of the northeast? Is there an old growth
> characteristic that includes spacing or density?
>
> Best regards,
> Travis Morse
>
> >
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