Fig. 2From: Effects of age-related increases in sapwood area, leaf area, and xylem conductivity on height-related hydraulic costs in two contrasting coniferous speciesLeaf area/sapwood area (in m−2 cm−2) at node 15 from tree top versus tree height for Douglas-fir and ponderosa pine trees (each point shows mean ± s.e. for n = 5–6 samples)Back to article page