Drought, Fire, and Forests

A special report published in the Knoxville News-Sentinel on November 20 noted that forest fires have now burned more than 119,000 acres in eight states across the Southeast. Though no lives have been lost in the fires, the smoke has sent hundreds of people from Asheville to Atlanta to emergency rooms and doctors’ offices with…  More 

Forests, Water, Climate, and Management

Across the globe, forests cover about a quarter of all land and are important sources of clean water. A new book, edited by U.S. Forest Service Southern Research Station (SRS) scientist Devendra Amatya, examines the interactions between forests, water, climate, and management. The book, Forest Hydrology: Processes, Management and Assessment, was recently published by the…  More 

Dry Air May Be More Stressful to Trees than Dry Soil

Scientists forecast that for many parts of the U.S., climate change will bring higher temperatures and more frequent and severe periods of drought. In parts of the West, forests are already changing as a result of drought, but all U.S. forests may be impacted, in turn affecting other important resources such as clean air and…  More 

Annual Report Keeps a Finger on the Pulse of U.S. Forest Health

Everyone can understand the importance of a yearly checkup for monitoring one’s general health and wellbeing. Regular “checkups” are also necessary to gauge the overall health and monitoring needs of U.S. forests, so managers, scientists, and decision makers look to the U.S. Forest Service’s annual Forest Health Monitoring (FHM) national report to gain insights into…  More 

Watersheds of the Future Could Mirror a Variable Climate

With some exceptions, precipitation, water yield from forests, and forest growth and productivity generally increase from west to east across the United States. Shifts in temperature and precipitation associated with climate change may not necessarily alter these general west-to-east trends, but U.S. Forest Service and university researchers do anticipate great variability in how watersheds respond…  More 

Our Dry, Warm Future may Favor Oaks

Historically, many oak forests across the eastern U.S. experienced frequent low-intensity fires that promoted the establishment and growth of oaks. “However, fire and other disturbances have become less common,” says U.S. Forest Service scientist James Vose. “Red maple, tulip poplar, and other mesophytic, fire-sensitive, and shade-tolerant trees are increasing in many areas of the eastern…  More 

Water Planning for the South in the New Fire Age

The ability to provide fresh drinking water is a critical ecosystem service of forests, and for many households in the southeastern United States, forests are the only source of municipal water supply. About 32 percent of the Southeast’s total annual water supply originates on state and private forest lands and another 3.4 percent on National Forest System…  More 

How Drought Affects Forests and Streams

Across the U.S., forested watersheds filter surface water that drains into the rivers that supply drinking water for many of the nation’s cities. Besides providing high quality water for humans needs, forest trees regulate streamflow, mitigate flooding, and help create and maintain the water conditions that support healthy aquatic ecosystems. Drought affects the ability of…  More 

Open or Shut: How Trees Respond to Drought at the Leaf Level

Trees pull water into their roots, where some of it moves up the trunk against the pull of gravity. This upward movement, which is described by the cohesion-tension theory, is possible because of the chemical nature of water. Water molecules are attracted to each other (cohesion), so just before a water molecule evaporates from the…  More 

Live Webinar This Friday: Effects of Drought on Forests and Rangelands in the U.S.

Title: Effects of Drought on Forests and Rangelands in the United States: A Comprehensive Science Synthesis What will you learn? The presenters will discuss key messages from the recently published drought assessment. Topics to be covered include a state-of-the-science review of direct and indirect impacts of drought on forests and rangelands, as well as a…  More