Figure 5

Schematic experimental setup and an example data set from the localized experiments.
Water samples were collected with narrow tubing from three sites next to the coral surface for H2O2 measurements. After eight minutes of sample collection (black arrows), the coral was applied with strong physical stimulus, at only one site (black star). The localized stimulus led to an increase in H2O2 concentrations at the site of stimulus (red squares), but not at the other sites (empty triangles and diamonds).