Canada’s dramatic summer weather — including wildfires and rain — has altered the fall colours this year, researchers say.
The customary reds, oranges and yellows of the trees, marking the arrival of fall, may have appeared early this year, or not at all.
“There is good reason to think that climate change will disrupt that normal leaf colouration that we see,” Thomas said. Mason MacDonald, an assistant professor of environmental sciences and agriculture at Dalhousie University, said the colours he’s seen so far this autumn don’t compare to the brilliant reds and oranges Nova Scotians are used to.
One of these pigments — anthocyanins — creates the red shade in leaves, and it requires consistent sunlight through late summer to be produced. A drop in anthocyanins isn’t harmful to a tree, MacDonald said, adding that if next summer is sunnier, those vibrant reds will likely be back in full force.
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