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Fig. 1. (A) Semi-logarithmic plot of habitat spectral irradiance (350-800 nm) for
the different light treatments employed in the study. `BRIGHT' refers to the
unshaded cage (`bright-light') treatment, `DIM' refers to the shaded cage
(`dim-light') treatment. The subscripts `Downwelling' and `Upwelling' refer to
irradiance measurements made with the recording probe pointing either directly
upwards towards the sky or directly downwards towards the substrate,
respectively. (B) Ratios of downwelling (solid line) and upwelling (broken
line) spectral irradiance between the bright-light and dim-light treatment
groups.