The potential for restoration of acid-damaged lake trout lakes

This review of long-term monitoring and experimental manipulation studies f rom Ontario, Canada, offers encouraging evidence that lake trout (Salvelinu s namaycush) populations can be restored to acidified lakes once the proble m of acid deposition is solved in North America. Predicting the rate of che mical and biological recovery remains difficult, because there are several limnological attributes (dissolved organic carbon, flushing rate) and biolo gical attributes (acid sensitivity, species longevity, fish community compo sition) of lake trout ecosystems that can either enhance or delay the recov ery process. Some options for managing recovering lakes are also reviewed, including increased pollution controls, liming, hatchery stocking, and harv est controls.