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 |