Estimation of leaf area index of three forest types in Xiaoxing’an Mountains of Northeast China. A Comparison of Different Quickbird Image Information for Estimating the Effective Leaf Area Index of Robinia pseudoacacia Plantations Seasonality and Spatial Pattern of Leaf Area Index of a Spruce-Fir Forest at the Valley in Xiaoxing’an Mountains Spatial analysis of LAIe of montane evergreen broad-leaved forest in southwest Sichuan, Northwest China, based on image texture. Seasonal dynamics in leaf area index in three typical temperate montane forests of China: a comparison of multi-observation methods