Changes in Water-Use Efficiency of Eucalyptus Plantations and Its Driving Factors in a Small County in South China

Ecosystem water-use efficiency (WUE) has been central in revealing the variability terrestrial carbon and water cycles. Short-rotation plantations such as Eucalyptus can simultaneously impact net primary production (NPP) actual evapotranspiration (ETa), components of WUE, resulting changes However, there are few detailed studies on WUE at catchment scale with high spatial remote sensing imagery. Here, we present its driving factors (i.e., NPP ETa) using satellite-based models combined 5-m resolution RapidEye imagery a small county South China. The increases ETa primarily result climate warming low plantations. management practice used (short rotation this study) enhance effect by varying A value leads to end short rotation, while results beginning another rotation. Changes indicated large temporal variability, associated short-rotation practices.