Keys to the global treeline formation: Thermal limit for its position and moisture for the taxon-specific variation - Yuyang Xie; Zehao Shen; J. Julio Camarero; Josep Peñuelas; Xuejing Wang; Jitang Li; Wenge Rao; Xiangwu Chen; Fu Zhao; Xiao Feng (Proceedings of the National Academy of Sciences, 2025)