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Bartlett: Needle Diseases of Conifers

Needlecast and needle blight are terms applied to a variety of foliage disorders of many coniferous species. These diseases are usually more severe on young trees or on trees growing outside of their natural range. Disease severity and corresponding...

Resource
9/15/21
Chicago Region 2020 Tree Census

The Morton Arboretum has released the results of its 2020 Chicago region tree census. Findings include the loss of an estimated 6 million ash trees, felled by the emerald ash borer. Chicago's canopy cover decreased from 19% to 16%, largely because of...

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5/4/21
Challenges to the Reforestation Pipeline in the United States

This article from Frontiers in Forests and Global Change explores large-scale global reforestation goals in the US. The authors used GIS analyses, surveys of nursery managers and foresters, and literature synthesis to assess the opportunities and...

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4/29/21
Challenges to the Reforestation Pipeline in the United States

Large-scale global reforestation goals have been proposed to help mitigate climate change and provide other ecosystem services. To explore reforestation potential in the United States, we used GIS analyses, surveys of nursery managers and foresters,...

Resource
3/4/21
Measuring multi-stemmed trees

Diameter at Breast Height (DBH) is an enormously important metric for foresters, arborists, researchers, contractors, and the general public. With single-stemmed species, it is used to estimate timber volume, biomass, ecosystem services, and...

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11/12/20
The global tree restoration potential

The restoration of trees remains among the most effective strategies for climate change
mitigation.We mapped the global potential tree coverage to show that 4.4 billion hectares
of canopy cover could exist under the current climate....

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7/9/20
The pollination services of forests

This document was developed as a contribution to “mainstreaming biodiversity
into agriculture, forestry and fisheries”, as recommended at the 24th Session of the
Committee on Forestry in 2018. It also contributes to FAO’s Strategic...

Resource
6/18/20
Lightning Protection for Trees

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). When...

Resource
12/12/19
URBAN TREE CANOPY ASSESSMENT: A Community’s Path to Understanding and Managing the Urban Forest

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. UTC assessments are often used for establishing and implementing...

Resource
8/1/19
Forest Resources of the United States, 2017: A Technical Document Supporting the Forest Service 2020 RPA Assessment.

The nation’s forest land area remains stable, but the composition and distribution of those forests is changing. The data supporting this assertion, along with other information on the status, condition, and trends in the nation’s forest resources, are...

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6/14/19
A consistent species richness–climate relationship for oaks across the Northern Hemisphere

Although the effects of climate on species richness are known, regional processes
may lead to different species richness–climate relationships across continents
resulting in species richness anomalies, especially for tropical groups....

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4/23/19
Wood and water: How trees modify wood development to cope with drought

Drought is a recurrent stress to forests, causing periodic forest mortality with enormous economic and environmental costs. Wood is the water‐conducting tissue of tree stems, and trees modify wood development to create anatomical features and hydraulic...

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3/8/19
An evolutionary and cultural biography of ginkgo

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
“nuts” and popular in herbal medicine, and it has proved...

Resource
12/11/18
The impact of ancient tree form on modern landscape preferences

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....

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10/10/18
Tree Genes Initiative REPORT 2018: Securing our Future Forests by Enhancing Technology, Capacity, and Speed

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. TGI members...

Resource
7/27/18
US Urban Forest Statistics, Values, and Projections

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). Between 2010 and 2060, urban land is projected...

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3/23/18
A Rapid Urban Site Index for Assessing the Quality of Street Tree Planting Sites

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. 

Resource
3/16/18
Urban Forests For Urban Futures: How Trees Help Create Better Cities

Check out this exciting webinar that covers which cities around the world are considered "green" and have a significant amount of green spaces and forest cover and what impact that is having on the economy, people, and environment. 

Resource
3/16/18
The Power of Trees

New research shows that trees communicate with one another and share nutrients through their roots! They need each other. In urban areas, trees also help us with health, economic and social benefits. They are part of our culture. We need them. So...

Resource
2/14/18
Forests & Climate Change

Dedicated to preserving our forests and replanting trees, American Forests provide information on the impacts of climate change on forests. The challenges facing trees from fire, urban areas, water and other issues are explored. The Global ReLeaf...

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11/1/15

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