"Primary Forest"?

[T.Lim]

Robert G. Weinberger (hr161 at cleveland.Freenet.Edu) wrote:

: In many of his posts, Dave Braun uses the term "primary 
: forest".  Although, I think I have some concept of what this 
: term is supposed to mean, I am curious as to whether there is 
 
: a standard scientific definition for it.  Or is it simply
In the UK areas forested for more than 400 years are known as
Ancient Semi-Natural Woodland.
However, forests IMHO
are only truly primary if there is no evidence of human intervention.

-Teck