Fig. 2. Example time series and temporal dynamics of carbonate chemistry parameters measured with LIX microsensors in the ECM within the growing edge of S. pistillata.

(A) pH, (B) CO₃²⁻, (C) Ca²⁺. Acquisition time, 2 s; illumination, 200 μmol photons m⁻¹ s⁻¹; ↑ at time point zero, insertion of the microsensor into the ECM; ↓, time of retracting the microsensor out of the ECM; *, exchange of syringes of the perfusion system and resulting interference with the measurement setup.