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Oxygen dynamics in L. patella. (A) Depth profiles of O2 concentration (in % air saturation) at increasing irradiance levels (given as numbers on curves in units of μmol photons m−2 s−1). (B) Dynamics of O2 concentration at ∼3 mm depth in a L. patella specimen under experimental light-dark shifts at different irradiance levels (given as numbers on curves in units of μmol photons m−2 s−1). Shaded areas indicate periods of illumination.
