As the U.S. and other countries have ramped up development of bio-energy as an alternative to fossil fuels, demand is rising for trees for wood pellets, or biomass, and agricultural products for liquefied biofuels. A recent multi-year study by researchers at North Carolina State University and the U.S. Geological Survey, detailed in two papers printed in August in the journal “Global Change Biology Bioenergy,” indicates that the increased demand could come with a cost: a loss of forested land, especially mature pinelands, and because of that, less habitat for wildlife.