Canada's forests are under threat from the emerald ash borer, a shiny green beetle that kills almost every ash tree it encounters. The insect was first detected near Windsor, Ont., in 2002, and has since spread to parts of Manitoba, Quebec, Nova Scotia and New Brunswick.
It's still standing 29 years later in New Maryland, N.B., but it's under threat from the emerald ash borer, a shiny green beetle that kills almost every ash tree it encounters.
"It's going to be one of the major factors influencing vulnerability of Canadian communities to climate change moving forward, because it's just this huge force of destruction in urban areas," Hudgins said. Within eight to 10 years of its introduction to a region, Natural Resources Canada says, the emerald ash borer kills as many as 99 per cent of unprotected ash trees."Climate change adaptation is really where urban trees have an important role in terms of limiting the number of people who are going to be dying of extreme heat events, mitigating floods, those types of outcomes," she said.
In Toronto, meanwhile, there's somewhere between 28 per cent and 31 per cent tree cover, and the city wants to increase that to 40 per cent by 2050.Before the pest was found in Toronto in 2007, the city estimates it was home to an estimated 860,000 ash trees on both public and private land. Of those, 32,000 were "street trees," located alongside roads. Others were in parks, on private property and in urban forests.
Hudgins said the most effective way to prevent the spread of the emerald ash borer is by controlling the movement of ash lumber, wood chips or nursery stock out of areas where the bug has already been found -- something the Canadian Food Inspection Agency has done for years.
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