. . . . . . . . . "Abundance of Syracosphaera protrudens (WoRMS 619049) per unit volume of the water body by identification and counting by scanning electron microscopy (SEM)"@en . . . . "Ab_SEM_BE007214" . . "SDN:P01::ASY07214" . . "accepted"@en . "Counts of a given biological entity using scanning electron microscopy normalised to a specified volume of fresh or salt water"@en . . . . . . . . .