Water Relations and Carbon Dynamics under Drought Stress and the Mechanisms of Drought-Induced Tree Mortality IMPACT OF EXTREME DROUGHT ON NET ECOSYSTEM EXCHANGE FROM LEMUS CHINENSIS STEPPE IN XILIN RIVER BASIN, CHINA Effects of extreme drought on plant species in Karst area of Guizhou Province, Southwest China. Climate characteristics of precipitation and extreme drought events in Northwest China Staged strategy of plants in response  to drought stress. Survival Strategy of Periploca sepium under Extremely Drought Conditions:Being Relative Dormant and Quick Resuscitation