One in four hardwood trees in the eastern United States was once an American chestnut. But no one today can take a walk in these woods beneath the once towering chestnut trees because the species is functionally extinct.
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There is increasing interest in tree planting as a nature-based solution to climate change. Many countries around the world have made pledges to the Bonn Challenge to bring millions of hectares of degraded land under restoration. However, there is growing concern in the biodiversity conservation and ecological restoration community that there is too little attention paid to which species are planted and where.
The Guelph area has a surprising diversity of tree species, and the Arboretum at the University of Guelph has just the thing to help schoolchildren identify them.
The Arboretum is producing hundreds of “Native Tree Leaves” sheets for distribution to more than 3,000 local Grade 6 students, and is working with the Upper Grand District School Board and the Wellington Catholic District School Board on ways to incorporate the resource into everyday learning.
Faced with deforestation, climate change, invasive pests, and new diseases, many trees are in trouble. Foresters and conservationists are scrambling to save them, but can’t protect every stand of woods. And prioritizing which places—and even which individual trees—warrant preservation has been a challenge. For example, “You want a lot of genetic diversity in a conservation area. … The higher the diversity, the more the chances that the population will survive,” says F. A. (Phil) Aravanopoulos, a forest geneticist at Aristotle University of Thessaloniki.
A Cultural Landscape Foundation report lists the Holden Arboretum in Kirtland among 10 U.S. landscapes threatened by climate change.