Ecosystem service trade-offs in the Guanzhong-Tianshui economic region of China Multi-scale analysis of ecosystem service trade-offs in urbanizing drylands of China: A case study in the Hohhot-Baotou-Ordos-Yulin region Advances in ecological immunology Testing of corner’s rules across woody plants in Tiantong region, Zhejiang Province: effects of micro-topography Research progress on trade-offs and synergies of ecosystem services: an overview