F4 BIOMASS Aboveground biomass of macrophytes Mean biomass [g m-2] Area [km2] Total biomass [t] Emerged 417.7 6.06 2,531 Submerged 417.1 16.21 6,761 Source: Howard-Williams, C. (1979) Distribution, biomass and role of aquatic macrophytes in Lake Sibaya. Lake Sibaya (ed. Allanson, B. R.), pp. 88-107.