Fig. 6: Structural equation model of the interactions among carbon, nitrogen, and environmental factors for all restored wetlands.
From: Ecosystem carbon and nitrogen recovery in restored coastal wetlands
Soil C: response ratios of soil carbon stock. Soil N: response ratios of soil nitrogen stock. Plant biomass: response ratios of plant biomass carbon stock. C/N ratio: soil organic carbon/nitrogen ratio. MTR: mean tidal range. SAL: soil salinity. BD: soil bulk density. Mud: soil mud content. pH: soil pH. SWC: soil water content. YAR: year after restoration. Blue, red, and dashed gray arrows indicate positive, negative, and insignificant relationships, respectively. Values associated with arrows represent standardized path coefficients, with significance indicated by asterisks (“*” for p < 0.05 and “**” for p < 0.01). The R2 values associated with the response variables indicate the proportion of the variation explained by the other variables. The model fit to the data was tested using chi-square (χ2), normed chi-square (χ2 / df), probability (p), root mean square error of approximation (RMSEA), comparative fit (CFI), and Tucker–Lewis indices (TLI). The sample size is 262.
