F4 BIOMASS Biomass and population density of epipelic algae in the drying phase. 18 Dec. 1967 3 Jan. 1968 9 Jan. 1968 Biomass [mg (chlorophyll a) 15.5 17.4 56.5 Population density* [cm-2] - 900,000 6,500,000 * Blue-green algae almost 100%. Source:Moss, B. (1979) Algae in Lake Chilwa and the waters of its catchment area. "Lake Chilwa" (ed. Kalk, M., McLachlan, A. J. & Howard-Williams, C.), pp. 93-103. Approximate animal biomass (dry weight) in three main benthic habitats during the recovery phase. Biomass [mg m-2] Area of habitat [km2]Whole lake biomass [kg] Permanent swamp 300 600 180,000 Temporary swamp 4,000 80 320,000 Mud of lake bed 3,000 100 300,000 Total 7,300 780 569,400 Source:McLachlan, A. J. (1979) Decline and recovery of the benthic invertebrate communities. "Lake Chilwa" (ed. Kalk, M., McLachlan, A. J. & Howard-Williams, C.), pp. 143-160.