Fig. 3. Schematic representation of Maya substrate types used to describe variation in edaphic conditions in this study. Grey fill indicates zones of soil accumulation. Local names are A=kon kon lu’um, B=laja or tsek’el, C=wool wool tunich, D= ch’iich lu’um, E=k’ankab. Types A—C tend to have high organic content, whereas types D and E tend to be redder in color, corresponding roughly to lithosols and rendzinas, respectively (Weisbach et al. 2002). The inset shows the relative position of each substrate type along the PCA axis, which we defined as our rockiness index, ranging from sites with a high proportion of plots with less rocky types D and E, to those with a high proportion of plots with rockier types A and B.