The graphic on this page shows a summary of lichen airscores on NWPS wilderness areas. Each wilderness area has a row of cells representing each reporting cycle, with each cell shaded to represent the number of lichen plots sampled that cycle. If there are enough observations to determine a trend, the trend direction is shown in red text inside that cell.

Only wilderness areas with known lichen plots are shown. Click a wilderness name to see lichen airscore trend analysis on that wilderness.