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Thousands of trees are struck by lightning every year. These trees will have varying degrees of damage ranging from complete shattering and destruction of the tree, to a slow lingering death, to virtually no apparent damage at all (Figure 1).
An Urban Tree Canopy (UTC) assessment, which provides a measure of a community’s tree canopy cover, is important for understanding the extent of a community’s forest or tree resource.
The nation’s forest land area remains stable, but the composition and distribution of those forests is changing.
Although the effects of climate on species richness are known, regional processes
may lead to different species richness–climate relationships across continents
Drought is a recurrent stress to forests, causing periodic forest mortality with enormous economic and environmental costs.
Ginkgo biloba is a distinctive living tree with a unique place in plant evolution and
human culture. It is valued in horticulture and as a street tree, is a source of edible
Empirical studies of the relationship between aspects of the landscape and human emotions have been fruitful over the last few decades. In fact, we are awash in data that describes a correlation between natural landscapes and positive human feelings.
The first TGI report, published in 2015, identified eight critical gaps slowing the transfer of stress-adapted trees from upstream research to forest owners and managers. The gaps fell into three categories: Innovation, Policy, and Markets.
U.S. urban land increased from 2.6% (57.9 million acres) in 2000 to 3.0% (68.0 million acres) in 2010. States with the greatest amount of urban growth were in the South/Southeast (TX, FL, NC, GA and SC).
Learn about how to evaluate sites that are ideal for urban tree health and growth and resources and tools on how to better assess these sites.