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From: "J.E. Shields" <jshields at INDY.NET>
Subject: Climate and the Ice Age
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I am of course interested in the long term climate changes. About 20,000
years ago, the spot where I'm sitting, writing this note, was under sever=al
thousand feet of ice. There was no little patch of woods out back, no
Arisaema triphyllum, no Trillium, no Claytonia here.

Where did our local Arisaema spend the long ice age? How did they travel
back to this spot, from wherever they survived the ice? I assume they
survived to the South. I assume they travelled back North as the ice
disappeared, perhaps as seeds in the craws of birds.

There is an interesting little book on the subject, "After the Ice Age. T=he
Return of Life to Glaciated North America" by E.C. Pielou, University of
Chicago Press, 1991. I need to look at it again, to refresh my memory. An=d
thanks, Tony, for the reference on the book you mentioned.

Jim Shields
in central Indiana, where once glaciers covered all

Jim Shields             USDA Zone 5             Shields Gardens, Ltd.
P.O. Box 92              WWW:
Westfield, Indiana 46074, USA
Tel. ++1-317-867-3344     or      toll-free 1-866-449-3344 in USA

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