21. The concepts and terminology used in describing meromictic lakes were essentially complete following some additions by G . Evelyn Hutchinson in 1937. 22. In meromictic lakes, however, the layers of the lake water can remain unmixed for years, decades, or centuries. 23. Depending on the exact definition of " meromictic ", the ratio between meromictic and holomictic lakes worldwide is around 1 : 1000. 24. Depending on the exact definition of " meromictic ", the ratio between meromictic and holomictic lakes worldwide is around 1 : 1000. 25. Other meromictic lakes in Norway with old seawater in the lower depths include Kilevann, Tronstadvann, Botnvatnet, R�rhopvatnet, and R�rholtfjorden. 26. The term " meromictic " was coined by the Austrian Ingo Findenegg in 1935, apparently based on the older word " holomictic ". 27. A study made in 1971 determined that the lake was meromictic , which makes the lake a prime site for archeological and geochemical studies. 28. "' Sulfitobacter brevis "'is a species of bacteria isolated from the hypersaline, heliothermal and meromictic Antarctic Ekho Lake. 29. Occasionally, carbon dioxide ( CO 2 ) or other dissolved gases can build up relatively undisturbed in the lower layers of a meromictic lake. 30. Meromictic lakes are quite rare; nearly all lakes undergo mixing of their deep and shallow waters at least once each year . limnological research.
