The objectives,tasks and characteristics of China ecological regionalization Review on air pollution induced ecological stress effects on urban vegetation Effects of simulated acid rain and Cd on the membrane lipid peroxidation and morphological characteristics of Hosta ventricosa Ecological stress in grassland ecosystems in source regions of Yangtze, Yellow and Lancang Rivers over last 40 years Ecological stress and environmental construction in mountain resorts: A case study in Taishan Mountain resort