. 2021 Apr 14;7(16):eabd3176. doi: 10.1126/sciadv.abd3176

Table 3. Summary of bilinear models with no preestablished break point fitted for the relationship between the particulate organic carbon formation efficiency (POC_FE) with time (Fig. 3).

Equation fitted: POC_FE ~ A + B * (T − C < 0) * (T − C), where T is the time (years), C is the year where the break occurs, A is mean POC_FE after T = C, and B is the change rate of POC_FE (POC_FE year⁻¹) before T = C. These nonlinear models were fitted with the nls function of the R software (73).

	Aboveground			Belowground
Parameters	Estimated	SE	P	Estimated	SE	P
A	0.06	0.04	0.2042	0.15	0.03	4.03 × 10^–5
B*	−0.25	0.09	0.0076	−0.38	0.08	6.25 × 10^–5
C	1.22	0.29	0.0003	1.04	0.13	3.99 × 10^–8

*The change rate B in relative terms (percentage of change respecting to the initial POC_FE) is −76% year⁻¹ for aboveground and −79% year⁻¹ for belowground.

Table 3. Summary of bilinear models with no preestablished break point fitted for the relationship between the particulate organic carbon formation efficiency (POCFE) with time (Fig. 3).

Table 3. Summary of bilinear models with no preestablished break point fitted for the relationship between the particulate organic carbon formation efficiency (POC_FE) with time (Fig. 3).