Jennifer Leman, December 14, 2017
Northern Canada is speckled with lakes. And those lakes tell stories, according to Tamlin Pavelsky, an associate professor at the University of North Carolina at Chapel Hill.
Pavelsky and other researchers are using data from a series of flights flown for NASA’s Arctic-Boreal Vulnerability Experiment (ABoVE) to understand how permafrost—which rests beneath roughly 50% of Canada and 80% of Alaska—affects the lakes that lie above it.
The goal is to understand “whether there’s a relationship to water levels in lakes and whether or not there’s permafrost underneath them,” said Pavelsky. He presented the team’s research methods in a poster session on 12 December at the American Geophysical Union’s 2017 Fall Meeting in New Orleans, La.
WINNIPEG, Dec. 18, 2017-Lakes suffering from harmful algal blooms may not respond to reduced, or even discontinued, artificial nitrogen loading. Many blue-green algae responsible for algal blooms can fix atmospheric nitrogen dissolved in the water, and therefore water stewards should focus their efforts on removing phosphorus from lakes to combat algal blooms.
This is according to a recently published article in Springer’s Ecosystems journal, Biological Nitrogen Fixation Prevents the Response of a Eutrophic Lake to Reduced Loading of Nitrogen: Evidence from a 46-Year Whole-Lake Experiment.
CBC News, Dec. 12, 2017 – Parks Canada has closed a lake and campground in Riding Mountain National Park to the public after DNA evidence of zebra mussels was found in water samples taken this summer and fall.
In a news release, Parks Canada said Whirlpool Lake, on the eastern side of the southwestern Manitoba park, and its campground area are closed until further notice as a precaution.
CBC News, Dec 1, 2017 – Winnipeg’s most expensive construction project is now even more expensive.
Upgrades to the North End water-pollution control centre, the largest of the city’s three sewage treatment plants, are now expected to cost $1.4 billion, a rise of $600 million from the last estimate.
A report to city council’s finance committee said the higher cost is a result of a new conceptual design. While officials hinted in September the new estimate would be “more than $1 billion,” the report published Friday is the first to formalize the new project cost.