Figure 10. Changes in the species richness and the equitability of radiolarian assemblages, as exemplified by single sample yields from an Equatorial area (from Boltovskoy 1987, surface sediments), a Transitional area (from data in Boltovskoy and Riedel 1987, 0-100 m plankton), and from the Antarctic (from data in Boltovskoy 1987, surface sediments).