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Name: Marion R.
Status: student
Age: 17
Location: N/A
Country: N/A
Date: 12/10/2002


Question:
What is the normal pH of healthy lichens that grow on spruce, fir, and pine trees?. For example what is the pH of the lichen before it is polluted?


Replies:
Perhaps useful:

http://kck.pathfinderscience.net/so2/research/00000000.html

http://redtail.eou.edu/peumodels/lens3.html

http://www.fs.fed.us/r6/aq/lichen/images.htm

http://www.nacse.org/lichenair/sensitivity_images/

The pH is normally acidic. It is the SO2 air pollution that is the problem.

Anthony Brach Ph.D



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