DBL thickness and oxygen flux in interactions between the massive coral Porites spp. and algae.

DBL thickness (µm), net photosynthesis rate (PN) and dark respiration rate (RD, both in nmol O2 cm−2 s−1) at the three sampling points (‘Coral’, ‘Interface’ and ‘Alga’) for each coral-algal interaction type (coral-turf and coral-CCA). Data are means ±95% Confidence Intervals. Note that oxygen fluxes at the interface between coral and algae were not calculated directly from the microprofiles due to violated assumptions in the one-dimensional Fick's first law of diffusion. Therefore the flux at the interface was modeled.