Fig. 6From: Evaluation of geochemical records as a paleoenvironmental proxy in the hypercalcified demosponge Astrosclera willeyanaWithin-skeleton variations in a δ18O and b δ13C values and c–g elements/Ca ratios of sclerosponges. Deviations to the average in an individual sample are shown. Horizontal lines and dotted lines respectively represent zero and standard deviation (2σ)Back to article page