1. The alternative hypothesis probably solve the lengthy debate over the sewage contamination and its effect on the lake. One theory argues that the excess of phytoplankton production is the result of the hydrothermal fluids warm in the deep water of lake
2. The hypothesis forming history introduction. 1968 & 1983 experiments
The details of latter experiment, which proves more than 85% pf the total new nitrogen derived from allochthonous sources.