LICHEN TECHNOLOGY, INC. AIR QUALITY EVALUATION FORM #2

Lichen Species
Record cover for five 5-year and five 10-year twigs
 Is the
lichen
abundant?		 If so,
scale
value is:
1
2
3
4
5
6
7
8
9
10
Physcia aipolia                      
Class 4
Lobaria pulmonaria
 
 
 
 
 
 
 
 
 
 
 
Class 4
Evernia prunastri
 
 
 
 
 
 
 
 
 
 
 
Class 3
Lepraria membranacea
 
 
 
 
 
 
 
 
 
 
 
Class 3
Usnea subfloridana
 
 
 
 
 
 
 
 
 
 
 
Class 2
Ramalina farinacea
 
 
 
 
 
 
 
 
 
 
 
Class 2
Parmelia subaurifera
 
 
 
 
 
 
 
 
 
 
 
Class 2
Parmelia sulcata
 
 
 
 
 
 
 
 
 
 
 
Class 1
Xanthoria polycarpa
 
 
 
 
 
 
 
 
 
 
 
Class 1

 
  1. Starting with the first lichen species, Physcia aipolia,  record the amount of each twig that the lichen covers, for ten twigs.  Record a 0 for less than 5% cover, a checkmark for 5% to 25% cover, and a + for greater than 25% cover.
  2. Decide whether the lichen is abundant.  The lichen is consideredd abundant if it has either two checks or one plus.
  3. If the lichen is abundant, read the scale value from the right hand column, and record it below.  If it is not abundant, repeat steps one through three for the next lichen species.  Continue until you find a lichen which is abundant.  If none of the above lichens are abundant, record a scale value of "Class 0." If no lichens at all are present, the scale value is "Class 00."
The scale value for this site 
is Class ___
 
Class 4 =  very clean air
Class 3 =  typical rural air
Class 2 =  typical urban air
Class 1 =  polluted air
Class 0 =  more polluted air
Class 00 =  most polluted air
 		 Copyright 1973 by LICHEN TECHNOLOGY,
INC., BOx 369, Corvallis, OR 97330.  Alll rights reserved.
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