Study: Draining Reservoir Helps Salmon

Study: Draining Reservoir Helps Salmon

For the past several years, the managers of a reservoir in Oregon have let all of the water out for a week or so, so that the stream that feeds it flows freely. The result? A boost for native salmon and the elimination of invasive, warm-water species of fish. Those...
Photo Retake Project Documents Long-Term Changes

Photo Retake Project Documents Long-Term Changes

Sometimes a great deal of insight about how landscapes change over time can be gained through relatively low-tech approaches. A “repeat photography” project on Wyoming’s Bridger-Teton National Forest offers a case in point. Half a century ago, George Gruell, a...
Disease Threatens Beech Trees

Disease Threatens Beech Trees

A mysterious disease first detected seven years ago is attacking beech trees in Ohio and Pennsylvania. Scientists are scrambling to find the cause as the disease spreads rapidly. Beech leaf disease has been detected in 11 counties in Ohio, eight in Pennsylvania, and...