Meromictic lakes are deep narrow lakes whose bottom waters never mix with waters above. Turnover is possible in spring and fall in upper waters of meromictic lakes. Oligotrophic lakes are lakes with low concentrations of nutrients. They are deep and have a larger hypolimnion than epilimnion. Eutrophic lakes are lakes with high concentrations of nutrients .
Mesotrophic lakes are in between oligo and eutrophic lakes.
Dystrophic lakes have an over slupply of organic matter which cannot be completely decomposed due to insufficient oxygen and alternative terminal electorn acceptors. They are other turbid and acidic. Relate the events of Lake Ciso to Figure 9.13 and the concept of chemoclines. This site maintained by the Life Sciences Web Team .