Figure 2 Variation in the species richness of marine bivalves across a latitudinal gradient on the eastern coastline of Australia, estimated using the corrected jackknife equation of Alroy (2020). Panels show different subsets of an OBIS dataset – the full dataset (a ), inclusive of observational data (b ), and with cells matched to field data (c ). Blue points in each panel show estimates based on field data for comparison. All y-axes are logged for clarity.