sentences:  The tract had previously been designated as a research forest under IP's ownership, attracting researchers from the US Forest Service, the University of Maine, NASA, NOAA, and the Woods Hole Research Center.Areas of study included acid rain, nutrient cycling, soil ecology, and more recently, forest carbon uptake and loss.The forest has one of the longest records of carbon flux measurement in the world, dating to 1996, providing important information about carbon sequestration in mature forests.