| vertical distribution of potentially pathogenic free-living amoebae in freshwater lakes. | the vertical distribution of thermotolerant (37 degrees c and 45 degrees c) free-living amoebae (fla) in warm monomictic lakes was determined in relation to the onset of thermal stratification and associated physical and chemical changes. the position of abiotic or biotic particulate layers in the water column was located by using a submersible horizontal beam transmissometer that measures attenuance, or the absorption and scattering of light by particulates in the water column. during mixis, th ... | 1985 | 3989753 |