Nature World: Trees are currently threatening growing grasslands, turning tallgrass prairies into shrublands and forests, and a pair of researchers is concerned that if nothing is done to stop or slow down this process, an important part of the ecosystem may soon be lost.
Two Kansas State University biologists, doctoral student Allison Veach and professor Walter Dodds, are researching grassland streams and the expansion of nearby woody vegetation, such as trees and shrubs, to see what can be done to save growing...