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. 2022 Jul 7;16(10):2329–2336. doi: 10.1038/s41396-022-01280-1

Fig. 3. Phycosphere pH of marine coccolithophore Emiliania huxleyi in the light (140 μmol photons m−2 s−1) and in the dark.

Fig. 3

Bulk seawater pH = 8.00. Note, in the light the phycosphere pH did not always increase and sometimes decreased (red arrows), and such decreases likely result from biogenic calcification, which releases protons or CO2.