Revisiting the silicon isotopic signal of sponge skeletons and its implications

These datasets are supplementary data files for a study that investigates the relationship between the silicon isotopic composition of sponge skeletal silica and seawater characteristics in sponge habitats, specifically the concentration of dissolved silicic acid and its Si isotopic signature. The study revisits the historical dataset, including a detailed examination of each datapoint to identify biases related to environmental, biological and taxonomic factors. We also contribute new isotopic data obtained, specifically targeting underrepresented low-silicic-acid, shallow- water environments.