Microbial cell fraction (Bac) or sponge cell fraction (Sponge) isolated from bulk sponge tissue; holobiont (combined bulk tissue including both microbial and sponge cells for Amphimedon compressa)
The G, H, I tubes were subsampled. Approximately 1/2 was used for the thorium-234 measurements. The absolute fraction of the total tube volume (i.e. the total sample collected) is indicated here.