Fig 3. Potential extracellular enzyme rates along linear transects from the grave.

Points are means of n = 3 samples from three independent transects. Significant changes in enzyme activity between distances are denoted by letters. Significant differences between surface soils (0‒5 cm, open circles) and soils collected at 30‒35 cm depth (filled circles) are indicated by asterisks. Measurements from off-grave site and control grave are included for reference. PDE = phosphodiesterase activity; NAG = N-acetyl-β-glucoseaminidase activity; CB = β-D-cellulobiosidase activity; LAP = leucine aminopeptidase activity; COL = collagenase activity.