One interesting use of herbarium specimens is to trace conserved
pollutants through time. Unfortunately, it is destructive, and one has
to be sure the specimens were stored in such a way that they did not
receive contamination after collection. Geert Raeymaekers did this for
sulfur for part of his Ph. D.: Raeymaekers, G. L. M. *DATE 1986.
*TITL Eco-physiological effects of simulated acidic rain and lead on
Pleurozium schreberi (Hedw.) Brid. *PUBL Ph. D. Dissertation, Michigan
Technological University, Houghton. 126 Pp.
I think he published it, but I haven't been able to figure out which
publication contains it. You can contact him at
<Geert.Raeymaekers from skynet.be>
Janice
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Dr. Janice Glime, Professor
President of IAB; Manager of Bryonet
Department of Biological Sciences
Michigan Technological University
1400 Townsend Dr.
Houghton, MI 49931 USA
email: jmglime from mtu.edu
phone: 906-487-2546
home: 906-482-1610
fax: 906-487-3167
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