Fig. 4
Structural equation model describing the influence of soil temperature and snowpack depth as drivers of soil total respiration (Rs) and its components (Rh and Ra) after fire disturbance. Solid boxes represent observed variables, while the hexagonal box depicts a composite variable (to account for a polynomial model structure). Single and double headed arrows represent relationships and correlations between variables, respectively; the strength and sign of relationships and correlations are depicted by standardized path coefficient. *, **, and *** represent significance at P < 0.05, 0.01, and 0.001, respectively