Archive for Climate Change

Lake trout ‘a canary in a coal mine’ for climate change: researcher

Aug. 15, CBC News:

A new study out of the University of Manitoba shows some lake predators are changing their behaviour due to climate change, which may have a wide-ranging effect on aquatic ecosystems.

Researchers watched the feeding habits of lake trout at the IISD Experimental Lakes Area in northwestern Ontario over an 11-year span and found the fish can quickly adapt their behaviour — moving to deeper and cooler parts of the lake to feed — as water temperatures rise.

Matthew Guzzo, a PhD candidate in the U of M’s department of biological sciences and lead author of the study published in the proceedings of National Academy of Sciences, said as temperatures rise, lake trout move from shallow, more productive waters to the deep part of the lake where water is cooler but food is of a lower quality. Read more.

How the Climate Crisis is changing our rivers

So much of the reporting on how the climate crisis is affecting water systems has centered on shrinking sea ice, glacial melt, and sea-level rise that it’s easy to forget that the crisis impacts every drop of H2O on the earth’s surface.

From the tiny stream in your grandmother’s backyard that you played in as a child to the mighty rivers that transport goods, power towns and cities, and provide recreation and fresh water to millions, waterways large and small are being transformed by climate change – and far quicker than even experts had predicted.

This spring, scientists studying Arctic river ice revealed what is being described as “the first case of large-scale river reorganization as a result of human-caused climate change,” according to the Washington Post. Read more.

Construction Corner: Flood waters continue to rise in a warming world

June 23, Daily Commercial News:

Climate change is often seen as posing the greatest threat to the world’s coastal areas.

But inland cities face perils of their own, including more intense storms and more frequent flooding.

Revised flood forecasts from the U.S. Army Corps of Engineers has got inland American cities scrambling. It seems that many of their bridges are going to be too low to cope with increased river flows as the climate warms.

A little more than a decade ago the city of Des Moines, Iowa, spruced up an old train trestle, turning it into a pedestrian and cycling pathway across the Des Moines River. But little more than a decade later, crews were back to the site with a crane to hoist the span 1.4 metres at a cost of $3 million. That was after the corps concluded that the river’s flood risk was nearly double earlier estimates. Read more.

The Water Brothers Visit ELA To Learn About Climate Change

On Friday March 24, 2017 at 7:30 p.m. (EST) join TVO’s The Water Brothers as they visit IISD Experimental Lakes Area to learn how climate change is affecting our water.

The episode On Thin Ice will broadcast on the television channel TVO in Ontario at that time, and then will be available for free streaming across Canada on The Water Brothers’ website the next day.

On Thin Ice looks at how climate change might affect Canada’s fresh water, and explores what Canadian scientists are doing about it. When the Water Brothers came to the site last year, they took part in a wide range of experiments determining how warming waters and reduced lake ice cover is harming freshwater ecosystems.