Oxygen is lower here, indicating increased consumption.We're looking at measures of Po2, not [O2], hence changes are not due to low O2 solubility at high temperature, but an interaction between the meristem and temperature consuming O2 at high temperature.Likely faster enzyme action > faster respiration.Assuming atmospheric PO2 is fixed at sealevel, the Po2 of water around seagrass depends on how quickly it diffuses to it, compared to how quickly seagrass consumes it. Rough conditions speed this up.