Between 1979 and 1981, the submerged aquatic macrophyte vegetation in the Wilderness lakes died back significantly, and in some areas disappeared altogether. This study documents the senescent phase and describes the recovery of the plant populations between May 1982 and May 1983. In two lakes, namely Langvlei and Eilandvlei, the plant biomass approximately doubled between the winters of 1982 and 1983. Seasonal changes in species composition are documented and possible factors accounting for the collapse and recovery of the plant populations are discussed.
Weisser, P. J., Whitfield, A. K., & Hall, C. M. (1992). The recovery and dynamics of submerged aquatic macrophyte vegetation in the Wilderness lakes, southern Cape. Bothalia, 22(2). https://doi.org/10.4102/abc.v22i2.851