Processing of each endmember and mixed canopy spectral data collection in situ.

(left) Acquisition of spectral data. (center) Sample selection for Nitraria shrub spectral data. (right) Sample selection for Haloxylon spectral data. PV represents the sunlit and shaded green leaves; NPV represents the sunlit and shaded wood, senescent material, and litter; BS represents the bare soil; shadow represents only the shade on the soil. The individual in this manuscript has given written informed consent (as outlined in PLOS consent form) to publish these case details.