Sorry, folks

Surferbeetle alerted me to the fact that the link which I provided in posting #11 no longer leads to Helen Peck's study.
I'm not sure why, and that is unfortunate because it provided a concise intro which people could examine before linking to the study itself.

Here is a direct link to Helen Peck's "Resilience in the Food Chain" (July 06):
http://www.cranfield.ac.uk/cds/depar...l%20report.pdf

Sorry for the confusion

rm