Fig. 2: Hydraulic trait variation across and within Amazon forest sites.
From: Basin-wide variation in tree hydraulic safety margins predicts the carbon balance of Amazon forests
a,d, Xylem water potential at which 50% of the conductance is lost (\(\varPsi \)50). b,e, HSMs related to \(\varPsi \)50 (HSM50 = \(\varPsi \)dry − \(\varPsi \)50). c,f, In situ dry season leaf water potential (\(\varPsi \)dry). d–f, Show hydraulic trait variation within intermediate DSL forests, subsetted according to Amazon region (central eastern Amazon: TAP, CAX and MAN; western Amazon: FEC and TAM). Dashed lines denote the mean value of each trait across all tree taxa in the dataset whereas the red line indicates HSMs equal to zero. Boxplots show the 25th percentile, median and 75th percentile. The vertical bars show the interquartile range ×1.5 and datapoints beyond these bars are outliers. Sites are sorted according to increasing water availability. Red, green and blue colours represent sites from ecotonal long DSL, intermediate DSL and aseasonal ever-wet forests, respectively. Each point represents one species per site (Ntotal = 170 species). Significant differences at P < 0.05 are shown on the figure (Wilcoxon rank sum tests).
