ScienceDaily: In a widely recognized painting by Tom Thomson, a bent and lonely tree hunches on a rocky ledge overlooking a windswept lake and distant snowy peaks. The misshapen tree remains so emblematic of the beauty and harshness of Canada’s climate that it is part of the permanent collection at the National Art Gallery in Ottawa. Fast forward 100 years after the tree first sparked the painter’s imagination and climate change is a global concern. It’s timely to consider how trees are faring on …