The CORE sites including Nancy Gulch (also referred to as Wyoming Big Sagebrush (WBS), Lower Sheep (LS), and Reynolds Mountain East (also referred to as Mountain Big Sagebrush (MBS) and Satellite sites, Upper Sheep and Flats are more intensively measured along an elevation gradient. Lithology is predominately basalt in origin. Sagebrush dominates the sites, but subspecies vary with elevation (Table 1). From low to high elevations, mean annual precipitation ranged from 235 to 803 mm, and mean annual temperature varied from 9.1 to 5.4 ˚C. We are focusing on intensive measurements of soil carbon and aboveground and belowground processes within the vicinity of the 5 eddy covariance towers. Five randomly, stratified plots were established as part of the CZO at the four sites around the circumference of the CZO core site location, which included an eddy covariance tower, soil moisture and temperature probes, automated soil respiration measurements, and soil carbon dioxide and oxygen measurements, sap flux data collection, and the exclusion of destructive sampling. Other process measurements at the CORE sites include measurements of aboveground biomass and limited aboveground net primary productivity (ANPP), litter and soil organic carbon dynamics, and manual soil CO2 gas.
Description of each site according to elevation (meters), GPS location (latitude and longitude, NAD83 UTM Zone 11 projection), mean annual temperature (MAT) (˚C), mean annual precipitation (MAP) (mm yr-1), and dominant vascular vegetation. Sites increase in elevation from Flats (F), Wyoming Big Sage (WBS), Low Sage (LS), to Mountain Big Sage (MBS). ADD UPPER SHEEP BELOW
Site Elevation GPS MAT MAP Vegetation
F 1170 521386.77 E, 4786114.36 N 9.1 235 Artemisia tridentate ssp. wyomingensis
WBS 1400 523321.08 E, 4779585.49 N 9.2 298 Artemisia tridentate ssp. wyomingensis
LS 1600 521498.19 E, 4776770.61 N 8.5 345 Artemisia arbuscula
MBS 2080 520063.97 E, 4767984.67 N 5.4 803 Artemisia tridentate ssp. vaseyana