On Wed, 8 Mar 2000, Swintosky, Michael D. wrote:
> We know that ANY new species introduced to an environment is going to
> produce change...

Tom Culliney wrote:
"We do not know anything of the kind... "

Tom quite rightly points out a problem in my statement above.  My intended
meaning was in reference to a new species that becomes established.  Merely
introducing a species that quickly dies out will not likely create any
significant ripples in the environment.  A species that becomes established
occupies a permanent niche, generally displacing something in the process
and offering new opportunities for the environment as a whole.

Mike