Provisional Element Analysis Thresholds

Provisional Element Analysis Thresholds: 97.5 % quantiles for element concentrations in lichens from background sites in Oregon, Washington and Alaska National Forests. Values above these concentrations are considered elevated; values at or below these concentrations are considered within background range. Concentration units are parts per million dry weight unless otherwise noted

Alectoria sarmentosa Bryoria fremontii Hypogymnia apinnata/
enteromorpha
Hypogymnia inactiva Hypogymnia imshaugii Letharia vulpina Lobaria oregana Platismatia glauca Sphaerophorus globosus shrubby Usnea
No. of records 391 95 83 88 56 159 89 250 73 40
Ash% 2.9 3.6 10.5 6.8 8.9 2.6 3.7   3.7 2.9
TotS% 0.06 0.11 0.09 0.12 0.09 0.08 0.15 0.07 0.07 0.08
TKN% 0.65 1.61 0.76 0.81 0.99 1.03 2.36 0.59 0.56 0.75
Al 170 695 2101 2166 1772 614 865 1514 579 499
B 4.9 34.2 9.2 5.3 13.9 3.5 5.1 3.6 5.1 3.7
Ba 32 31 143.2 85.3 153 52.1 14.4 68.1 23.8 30.1
Be 0.04 0.04 0.08 0.08 0.06 0.04 0.04 0.05 0.04 0.04
Ca 9857 4222 27346 18107 27766 7325 1243 3507 1857 8202
Cd 0.4 0.6 0.8 0.4 0.5 0.4 0.8 0.5 0.2 0.3
Co 0.4 0.3 0.5 0.3 0.9 0.4 0.3 0.3 0.3 0.4
Cr 1.8 2.9 3.7 5 4.5 2.1 1.9 3 3.7 4.1
Cu 10.2 23.3 39.1 47.2 33.8 14.9 10.7 27.8 23.1 25.6
Fe 139 581 1655 2286 1746 472 622 1459 552 272
K 2583 4718 3767 3701 3790 3243 9967 2454 2256 3674
Li 0.4 0.4 0.8 1.7 0.8 0.4 0.9 0.8 0.7 0.5
Mg 602 816 2109 1283 1459 833 684 813 716 2280
Mn 490.5 678.9 858.5 745.9 1104.2 408.5 448.4 803.7 466.9 572
Mo 0.2 0.4 1.1 1 0.6 0.3 0.4 0.8 0.4 0.4
Na 230.4 117.8 561.6 334.2 295 134 263.7 266.2 387.9 934
Ni 2.4 3.6 6.6 6.8 6 2.7 2.6 4.4 3.6 7.1
P 1054 1938 1739 1560 1564 1147 3821 1145 940 1174
Pb 6.1 3.3 23.8 16.6 12.8 7 3.6 10 3.2 13.3
Rb 53 53 53 53 53 53 57 53 53 53
Si 320 607 1168 1130 939 728 984 1043 750 620
Sr 27.4 38 99.6 103 126 31.7 10.4 41.7 14.8 31.4
Ti 15.4 62.4 216.5 141.6 140.9 56 84.7 124.3 35.9 40.6
V 0.8 1.4 6.8 6.1 3.5 1.5 3 4.6 4.5 1.5
Zn 44.5 56.1 62.7 66.8 62.9 43.6 73.8 49.6 34.5 65.8