[permaculture] Exotic Species: #2 Cause of Extinction?

Edward edward at iinet.net.au
Fri Jul 5 21:27:24 EDT 2002

Heide & All


I Strongly recommend reading Edward O Wilson's "The Future of Life" for
an overview from one of the most perceptive and experienced elder
statesmen of sustainable futures.


The information is right up to date (published last year) and well




Edward Brown

edward at iinet.net.au


-----Original Message-----
From: permaculture-admin at lists.ibiblio.org
[mailto:permaculture-admin at lists.ibiblio.org] On Behalf Of Heide Hermary
Sent: Friday, 5 July 2002 10:38 AM
To: permaculture at lists.ibiblio.org
Subject: Re: [permaculture] Exotic Species: #2 Cause of Extinction?


What do they call "exotic" plant species: all our food plants that were
originally imported from other continents? Weeds? Urban ornamental
gardens? I don't know, I'd like to see some of the original research /
statistics on this. 

Kirby Fry wrote: 

Hello, Has anyone heard the figure that exotic plant species are the
number two cause of species extinction in the U.S.A?  I'm hearing it a
lot from the native plant societies.  My first response to this is;
what's the number three cause?  It sounds like this snippet may come
from a study which lumps all DIRECT human disturbances into one category
- i.e. farming and urbanization fall into "direct disturbance," and then
exotic plants somehow not belonging in the number one category and
sweeping second place. This factoid is also referred to often by
ecosystem restoration and prairie enthusiasts and aimed like a weapon at
non-native vegetation - i.e. China-berry, Chinese tallow trees, bastard
cabbage, Johnson grass, and many others exotics of which I'm sure you've
had your local culprit. My question, however, is how much money and time
do we spend on exotic / invasive (including native invasives) species
eradication? Has there ever been a species eradication project that
didn't require perpetual maintenance?  Can exotics naturalize in a
symbiotic manner? Fukuoka rather surprised me in his third book, "The
Road Less Traveled," when he recommended the heavy use of pesticides to
control an inevitable outbreak of the Mediterranean fruit fly in Japan.
Even Mollison told me to get rid of a patch of Georgia Cain or elephant
grass. Thanks,  Kirby Fry For the real scoop on environmental and social
justice issues check out the archives of Democracy Now!

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