Abstract
White Oak Lake, Oak Ridge, Tennessee, was used as a dilution basin for radioactive and chemical wastes from 1943 to 1955, when it was drained. From 1956 to 1960 the vegetation on 3 acres of the dry lake bed was identified, mapped, and clip sample. The plant collections revealed rapid invasion and succession by many species. Cover was almost complete the second year. The initial forb cover, made up chiefly of Polygonum, subsequently declined from 73% to 20%. Juncus and Carex, which provided the major cover in 1957 and 1959 respectively, had declined by 1960. Thickets and open woody stands of Salix developed in the first 2 years after lake was drained. Only a slight correlation was found between the vegetation patterns and the isopleths of known physical or chemical soil characteristics.
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