SUMMER 2018 VOL 9 , I SSUE 2 WATER LEVELS, WATER QUALITY AND ECOSYSTEMS Protecting your water. CAGE AQUACULTURE: EXAMINING IMPACTS Also Inside: THE STATUS OF CAGE AQUACULTURE PAGE 3 CAGE AQUACULTURE: OUR BIGGEST FINDINGS AND QUESTIONS PAGE 4 HOW YOU’RE HELPING US WIN THE WAR ON INVASIVE PHRAGMITES PAGE 7 FRASER DANE – MAKING A DIFFERENCE PAGE 7 In 1973, Experimental Lake 226 in the Kenora District was divided into 2 basins. Extra phosphorus was added to one side by scientists. As a result of this experiment, phosphates were banned from detergents. Now, extra Phosphorus from open cage aquaculture is a risk to freshwater in Ontario. However, many areas of Georgian Bay are more dynamic than Lake 226. In some areas, Phosphorus nutrients are actually too low to support a healthy aquatic ecosystem. To mitigate risk, it is critical for GBF to examine impacts from open cage aquaculture within more complex and diverse Georgian Bay sites. Ecosystem impacts could vary widely — potentially negative in some areas, or positive in others. GBF is at the forefront of finding out these impacts, in order to inform improved regulation. Read on to learn what we’ve discovered so far.