This article came from Northern Life, Sudbury’s biweekly newspaper.
Blue-green algae the next big threat: Vital Signs
The city’s lakes have seen a dramatic recovery since local mining companies started cutting back on their air emissions 30 years ago, said the honorary chair of this year’s Vital Signs Report.
John Gunn, director of the Vale Living with Lakes Centre, said sulphate levels in Clearwater Lake, located in the city’s South End, have decreased dramatically since 1973, while the pH level has gone back up. Nickel, copper and aluminium levels have also decreased in the lake.
Gunn was the keynote speaker at the Oct. 2 launch of the report. He said fish populations have also dramatically increased at a number of local lakes. For example, in 1990, McFarlane Lake had only four types of fish — now it has 12
Those are facts found within the 20-page 2012 edition of the Greater Sudbury’s Vital Signs report, titled the City of Lakes Edition, a document coined as Greater Sudbury’s annual check-up. It’s put together by the Sudbury Community Foundation.