Fig. 4From: Sponge bioerosion accelerated by ocean acidification across species and latitudes?Comparison of bioerosion capacity of azooxanthellate C. celata form cold-temperate Helgoland (this study) versus zooxanthellate C. orientalis from the tropical Great Barrier Reef (Wisshak et al. 2013) as a function of pCO2. a Linear regressions of mean chemical bioerosion rates. b Linear regressions of chemical bioerosion expressed as per cent of the present-day rateBack to article page