تبديل جنگل هاي طبيعي به نهالستان هاي جنگلي مديريت شده مقاومت درختان در برابر خشكسالي هاي طولاني مدت را كاهش مي دهد

عنوان انگلیسی: Conversion of natural forests to managed forest plantations decreases tree resistance to prolonged droughts چکیده انگلیسی: Abstract: Throughout the southern US, past forest management practices have replaced large areas of native forests with loblolly pine plantations and have resulted in changes in forest response to extreme weather conditions. However, uncertainty remains about the response of planted versus natural species to drought across the geographical range of these forests. Taking advantage of a cluster of unmanaged stands (85–130 year-old hardwoods) and managed plantations (17–20 year-old loblolly pine) in coastal and Piedmont areas of North Carolina, tree water use, cavitation resistance, whole-tree hydraulic (Ktree) and stomatal (Gs) conductances were measured in four sites covering representative forests growing in the region. We also used a hydraulic model to