The LAIs were calculated by unconstrained analysis
of hemispherical photographs (Table 1). Plots with
higher stocking or greater canopy closure had the highest
LAIs. The largest coefficients of variance for LAI
occurred in plots with the lowest canopy coverage and
the highest gap fractions. Calculated LAI had a strong
negative linear relationship with transmitted PAR (r =
−0.75, n = 936). For comparison, the gap fraction
(hemispherical densiometer) model had R2 = 0.73
when fitted to PAR transmission