Table 1. Scaling exponents (α) and intercepts (β) of M-A relationship at six altitudes as estimated by RMA regression.

Altitude (m)	Latitude (N°)	Longitude (E°)	α	95% CI of α	β	95% CI of β	R2	Sample size
414	119°26.41′	30°19.61′	0.859 c	0.780, 0.946	−2.103	−2.249, −1.957	0.823	78
620	119°26.24′	30°19.90′	0.963bc	0.853, 1.088	−2.248	−2.463, −2.033	0.642	97
850	119°26.00′	30°20.24′	1.000b	0.912, 1.097	−2.374	−2.541, −2.206	0.704	138
1086	119°26.03′	30°24.49′	1.113ab	0.974, 1.273	−2.473	−2.541, −2.206	0.640	81
1286	119°25.67′	30°20.64′	1.299 a	1.160, 1.455	−2.868	−3.114, −2.623	0.773	72
1462	119°25.51′	30°28.90′	1.258 a	1.161, 1.364	−2.821	−2.993, −2.649	0.839	99

All regressions were significant (P<0.05). Boldfaced slopes are statistically significant different from 1 at P<0.05 level. The Post-hoc multiple comparison of slopes were shown among altitudes, where the slopes sharing the same superscript letters are not significantly different from each other at P<0.05 level.