Fig. 5: Indirect effects produce an East–West contrast.
From: Continent-wide tree fecundity driven by indirect climate effects
a Fecundity rising then falling with size, for a common eastern hardwood (Q. alba) and western conifer (A. concolor) plotted on the square root scale. The predictive mean (black line) is bounded by the 90% credible interval (dark shading) and the 90% predictive interval (light shading) over all tree-years. b The growth effect includes terms in Eq. (1) that are multiplied by dG/dt, that is, ∂f/∂G + ∂f/∂(GC) × C (units are log f/yr). Averages shift from positive in the East to near zero or negative in the West, where more trees are near or past the diameter where growth stimulation increases fecundity.
