Figure 4: Relationship between species-level wood density and population differentiation for survival (a) height increment (b) and inherent growth rate, IGR (c) in tropical trees grown across three common garden experimental plots. All points represent the sympatric/allopatric calculations of local adaptation using pairwise comparisons for lowland and upland provenances from the models. Values greater than 0 (red horizontal line) indicate greater mean performance of the local provenance in their local site (local adaptation), and values < 0 indicate greater mean performance of the nonlocal provenance in their nonlocal sites (maladaptation), significant regression trends (P <0.05) are indicated by solid line.