Data were collected as part of the Northwest Forest Conservation Plan. Data were collected from 300 half-acre (0.2 ha) sites on the Current Vegetation Survey grid in Gifford-Pinchot National Forest, the Umpqua Basin, and the Oregon Coast. Samples were collected between 2002 and 2003. Indicator variables denoted the presence or absence of 7 lichen species. This dataset may be used as a test dataset for the lichen dataset included in this package.
lichenTestA data frame with 300 observations and 40 variables. One variable is a location identifier, 7 identify the presence or absence of the lichen species, and 32 are characteristics of the survey site where the data were collected.
As with the Lichen Air Quality data, the variables with the suffix Ave in the variable name are the average of 12 monthly variables. The variables with the suffix Diff are contrasts between the sum of the April-September monthly values and the sum of the October-December and January-March monthly values, divided by 12. Roughly speaking, these are summer-to-winter contrasts.
The variables are summarized as follows:
Identifier of the section of forest from which the data were collected.
Lobaria oregana (Absent = 0, Present = 1)
Lobaria pulmonaria (Absent = 0, Present = 1)
Nephroma bellum (Absent = 0, Present = 1)
Nephroma helveticum (Absent = 0, Present = 1)
Pseudocyphellaria anomala (Absent = 0, Present = 1)
Pseudocyphellaria anthraspis (Absent = 0, Present = 1)
Pseudocyphellaria crocata (Absent = 0, Present = 1)
Average monthly potential evapotranspiration in mm
Summer-to-winter difference in monthly potential evapotranspiration in mm
Average monthly moisture index in cm
Summer-to-winter difference in monthly monthly moisture index in cm
Average monthly precipitation in cm
Summer-to-winter difference in monthly precipitation in cm
Average monthly relative humidity in percent
Summer-to-winter difference in monthly relative humidity in percent
Average monthly potential global radiation in kJ
Summer-to-winter difference in monthly potential global radiation in kJ
Average monthly average temperature in degrees Celsius
Summer-to-winter difference in monthly average temperature in degrees Celsius
Average monthly maximum temperature in degrees Celsius
Summer-to-winter difference in monthly maximum temperature in degrees Celsius
Average monthly minimum temperature in degrees Celsius
Summer-to-winter difference in monthly minimum temperature in degrees Celsius
Mean average daytime temperature in degrees Celsius
Summer-to-winter difference in average daytime temperature in degrees Celsius
Average monthly average ambient vapor pressure in Pa
Summer-to-winter difference in monthly average ambient vapor pressure in Pa
Average monthly average saturated vapor pressure in Pa
Summer-to-winter difference in monthly average saturated vapor pressure in Pa
Aspect in degrees
Transformed Aspect: TransAspect=(1-cos(Aspect))/2
Elevation in meters
Percent slope
Reserve Status (Reserve, Matrix)
Stand Age Class (< 80 years, 80+ years)
Average age of the dominant conifer in years
Percent vegetation cover
Percent conifer cover
Percent broadleaf cover
Live tree (> 1inch DBH) biomass, above ground, dry weight.