Fig. 1
From: CASCADE: Dataset of extant coccolithophore size, carbon content and global distribution
Graphical Abstract: An overview of CASCADE dataset’s pipeline. We compiled taxonomic-unit-specific cell size and cellular organic carbon (POC) and inorganic carbon (PIC) contents for 139 coccolithophore taxonomic units. We then combined them with a global abundance observational dataset to create a gridded data product (Latitude/Longitude/Depth/Month/Year) of the global distributions of taxonomic-unit-specific coccolithophore carbon stocks. The pipeline consists of the following steps for a given taxonomic unit (i. (A) Direct POC laboratory measurements of taxonomic unit i are compiled from the literature. (B) If POC measurements are available for taxonomic unit i, measurements are statistically reconstructed to create a merged estimate of POC content of taxonomic unit i. (C) If direct measurements are unavailable for taxonomic unit i, an allometric Generalised Linear Model (GLM) based on cell size and POC contents of all taxonomic units with observations is used to estimate taxonomic unit i’s cellular POC content from its merged cell-size distribution (E). The merged cell-size estimate of taxonomic unit i is created by compiling cell-size estimates of taxonomic unit i (F), which are then statistically reconstructed to propagate the error distributions of measurements from different studies (G). For cellular PIC content estimates, a similar process is applied. (H) PIC measurements are conducted and compiled from the literature. (J) If direct measurements are available for taxonomic unit i, its PIC measurements are statistically reconstructed and used to create a merged estimate of its PIC content (K). If no direct estimates are available for taxonomic unit i, an allometric Generalised Linear Model (GLM) based on cell size and PIC contents of all taxonomic units with observations is used to estimate taxonomic unit i’s cellular PIC content from its merged cell-size estimate (E). Finally, global spatial-temporal abundances of taxonomic unit i are compiled (L) and then converted into organic carbon (D) and inorganic (K) stocks, providing a global distribution of cellular carbon stocks for taxonomic unit i (M). This pipeline is then applied for each taxonomic unit (139 in total).
