Table 1.

Functional plant trait values and their effects on performance estimates for the studied sapling community

Traits,LAI,As,LMA,Nmass,ψmin,ρs,Ks,
unitsm2⋅m−2cm2kg⋅m2mg⋅g−1MPakg⋅m3kg⋅m−1⋅s−1⋅MPa−1
Mean1.1200.170.09125−1.774355.0
Min0.4600.060.05118−3.422110.7
Max2.3900.310.16734−0.1762916.0
Sensitivities
 Max C gain59.2−0.29−1.519.3−1.6−0.20.3
 LCP29.00.94.135.50.3−0.60.0
 WCP002.0−2.062.00.0−2.0
  • Minimum, maximum, and average trait values are given for the studied species (for values of individual species, see Table S4). The sensitivities (%) in maximum carbon gain, light compensation point (LCP), and water compensation point (WCP) to the observed variation in functional traits were calculated. These sensitivities show the responses in these performance traits to the variation in each functional trait, with this variation calculated as the difference between max/min values of a functional trait relative to the mean value of the trait. The considered functional traits include leaf area index (LAI), the stem sapwood cross-section area (As), the leaf mass per area (LMA), the nitrogen mass per leaf mass (Nmass), the minimum leaf water potential (ψmin) at the end of the dry season, the wood density (ρs), and the sapwood-specific hydraulic conductivity (Ks). We calculated the sensitivities S (%) (carbon gain, LCP, or WCP) in response to a functional trait X: S = 100% × 1/2 × {[|Y(Xmin) − Y(Xmean)|]/Y(Xmean) + [|Y(Xmax) − Y(Xmean)|]/Y(Xmean)}. A minus sign was added to Y when X had a negative effect on Y.