Nitrogen addition delays the emergence of an aridity-induced threshold for plant biomass - Li, Hailing (Lanzhou University. College of Ecology. State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems) ; Terrer, César (Massachusetts Institute of Technology. Department of Civil and Environmental Engineering) ; Berdugo, Miguel (Universitat d'Alacant. Institut Multidisciplinari per a l'Estudi del Medi 'Ramón Margalef') ; Maestre, Fernando T. (Universitat d'Alacant. Institut Multidisciplinari per a l'Estudi del Medi 'Ramón Margalef') ; Zhu, Zaichun (Peking University. School of Urban Planning and Design) ; Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ; Yu, Kailiang (Princeton University. High Meadows Environmental Institute) ; Luo, Lin (Lanzhou University. College of Ecology. State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems) ; Gong, Jie-Yu (Lanzhou University. College of Ecology. State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems) ; Ye, Jian-Sheng (Lanzhou University. College of Ecology. State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems)