How Drought and Thinning Affect Water Balances in Southeastern Pine Plantations

Evapotranspiration – the combination of water evaporation and plant transpiration – is an essential process for forests and water supply and climate. This is particularly true in the Southeastern U.S. where evapotranspiration from forested watersheds can return 50 to 90 percent of annual precipitation to the atmosphere. Until now, there has been a gap in…  More 

Hemlock Seedlings Released from Shade

Eastern hemlock typically grows in shady environments, but its world is now infested by hemlock woolly adelgids (HWA). The miniscule sap-sucking insects can kill mature trees in less than five years. “Eastern hemlock is a shade-tolerant species,” says USDA Forest Service research entomologist Bud Mayfield. “But extra sunlight may help it survive HWA infestation.” Extra…  More 

SRS Contributes to Fourth National Climate Assessment

Long hours, lots of reading, and collaborating with fellow scientists around the world is some of what goes into overseeing a chapter for the Fourth National Climate Assessment (NCA4). SRS senior research ecologist James Vose was a federal coordinating lead author and chapter lead for Chapter 6 – Forests of the NCA4. SRS senior economist…  More 

Using CAT in Local Watersheds

General circulation models use math to predict the future – future rainfall and temperature data, for example. But GCMs are meant for global or regional scales. “CAT is better for fine scales,” says USDA Forest Service research hydrologist Ying Ouyang. CAT, the Climate Assessment Tool, is a model developed by the U.S. Environmental Protection Agency.…  More 

How I Joined the Wood-in-the-Water Choir

Not everyone knows from an early age what they want to do when they grow up. I did. Raised in a small coastal Maine town that was home base for marine and estuarine research and with an affinity for the outdoors, I knew I was destined to pursue a career in marine biology. Right out…  More 

The Future of Forests & Water in the NC Piedmont

We’re all downstream from something. A new modeling study by the USDA Forest Service shows that forests make very good upstream neighbors. The research focuses on the Yadkin Pee-Dee River Basin in central North Carolina. Senior research ecologist Jim Vose and colleagues have been studying this area because of its projected rapid population growth and…  More 

Putting Mangrove Data to Work in East Africa

Mangrove forests are among the most carbon-rich ecosystems on the planet. Their stilt-like roots trap carbon and other nutrients that rivers have carried to the coastal deltas where mangroves grow. They act as a buffer, protecting coastlines and the people who live there from increasingly strong seas and storm surges. People depend on mangrove forests…  More 

Formidable Forest Shrubs Affect Tree Height and Biomass

Forests are made of three-dimensional life forms that constantly interact with each other and with the abiotic factors in their environment. A recent study shows how complex those interactions can be. “Trees growing within an evergreen shrub layer can be almost 20 feet shorter than trees without a shrub layer,” says USDA Forest Service scientist…  More 

Tribal Wetlands Training

In June, seven representatives of five Tribal Nations joined USDA Forest Service and U.S. Army Corps of Engineers experts for the Tribal Wetlands Training workshop, hosted by the United South and Eastern Tribes, Inc. Where does a wetland begin or end? Delineating the boundaries of a wetland is difficult. “Our goal was to help participants –…  More 

Long-Term Research Yields Understanding and Insights

Gaze at a painting for long enough, and you may notice details that you didn’t see right away: light, movement, and texture. This happens with research data, too. “At Coweeta, we all talk about how everything fits together,” says USDA Forest Service scientist Jennifer Knoepp. “We have been analyzing long-term watershed data for more than…  More