Figure 1: Comparisons of annual size spectra. (a, b) The “Sheldon” and normalized biomass size spectra, respectively, for extremely disturbed years, 1997 and 1998 (after ). The biomass size spectrum describes the assemblage biomass distribution to size classes of cell volume logarithm, and the normalized biomass size spectrum can be interpreted as the cell abundance ( cell) distribution approximation. (c) The traditional taxonomic size-spectrum (TTSS) change for representative years of the stable (1983, 1985) and extremely disturbed (1998) periods (after ). The curves are marked by the year they represent (yy). All phytoplankton species with cell size ≥2 μm and colonial species of smaller cell size are included, but not unicellular picoplankton. Size classes were created by doubling cell volume () and are presented on a logarithmic scale ().