Table 3. Mean soil N and C isotopic values and biogeochemical parameters.

Mean soils		Mean δ15N per site	Mean δ13C per site	%N	%C	C/N
Site	Elevation
TLT01	4480	5.9	−23.3	0.01	0.16	16.0
TLT02	4370	7.6	−24.3	0.02	0.19	9.5
TLT03	4270	6.6	−24.4	0.02	0.17	8.5
TLT04	4174	5.9	−23.8	0.03	0.29	9.7
TLT05	4072	4.0	−22.6	0.02	0.23	11.5
TLT06	3970	6.8	−22.2	0.02	0.29	14.5
TLT07	3870	7.7	−22.5	0.03	0.35	11.7
TLT08	3870	7.5	−22.5	0.02	0.32	16.0
TLT09	3770	9.1	−22.7	0.03	0.26	8.7
TLT10	3670	8.0	−22.0	0.02	0.19	9.5
TLT11	3570	9.5	−21.1	0.02	0.15	7.5
TLT12	3470	8.7	−19.6	0.02	0.17	8.5
TLT13	3370	6.6	−21.5	0.03	0.32	10.7
TLT14	3270	10.6	−17.9	0.03	0.21	7.0
TLT15	3170	8.4	−19.0	0.02	0.14	7.0
TLT16	3070	10.0	−18.5	0.01	0.10	10.0
TLT17	2970	10.0	−14.4	0.02	0.13	6.5
TLT18	2870	9.7	−18.3	0.01	0.10	10.0
TLT19	2770	11.1	−13.2	0.01	0.13	13.0
TLT20	2670	8.7	−12.4	0.01	0.09	9.0

Data were obtained from 40 different soil samples (Supplementary Table 1).