Physical and chemical conditions underneath and above macroalgal assemblages in the field on inshore coral reefs.

Physical and chemical conditions underneath and 0.3 m above mat- (N = 8) and canopy-forming (N = 11) macroalgal assemblages on inshore coral reefs of the Great Barrier Reef, and results of paired t-tests. Abbreviations and units: pH, dissolved oxygen (DO, mg L−1), alkalinity (ALK, µEq/kg), dissolved inorganic carbon (DIC, µM) dissolved organic carbon (DOC, mg L−1), silicic acid (Si, µM), soluble reactive phosphorus (SRP, µM) and Irradiance (µmol photons m−2 s−1).