In the 1960s, acid rain poisoned Ontario’s lakes, and the smallest survivors left a genetic record in the mud that took scientists decades to uncover |
Zooplankton, Copepod, Leptodiaptomus minutus, male| Image Credit: Wikimedia Commons When acid rain swept across parts of Ontario in the 1960s, it had a dramatic effect on freshwater ecosystems.Populations of fish were wiped out, many microscopic aquatic species declined, and vast areas of lakes became far more acidic than they had been in centuries. Amidst the…