Twentieth century carbon stock changes related to Piñon-Juniper expansion into a black sagebrush community

Table 6 Object-based image segmentation and ground based measurement comparisons for the LD and HD 300 m ² plots

Measurement	LD	HD
Image segmentation canopies	32	42
Ground measured canopies	31	42
Image segmentation canopy area plot^-1 (m²)	137.00	235.00
Ground measured canopy area plot^-1 (m²)	130.05	213.57
Image segmentation mean canopy area tree^-1 (m²)	4.15 (0.55)	5.46 (0.59)
Ground measured mean canopy area (m²)	4.19 (0.69)	5.08 (0.83)
Image segmentation kg C plot^-1	455.12	846.11
Ground based measured kg C plot^-1 using Huang et al. [49] calculation	457.98	833.39
Ground based measured kg C plot^-1 using dbh	327.26	937.49

Image segmentation tree C estimates per plot use the equation developed by Huang et al. [49]. Ground based tree C estimates are shown twice. Once using tree canopy area and the Huang et al. [49] equation and once using dbh and the appropriate tree species equation.

ISSN: 1750-0680