The extinction by sulfide-turnover and recovery of a naturally eutrophic, meromictic seawater lake

Turnover of lake water layers in September 1997 occurred so quickly that it resulted in the appearance of total anoxia and sulfide presence throughout the water column. The aerobic flora and fauna died and added to the oxygen demand and the production of nutrients. Those long-term datasets help in recognizing the general trend from unique cases, such as the anoxic event in 1997, which was related to anthropogenic eutrophication.