Asymmetric responses of plant aboveground and belowground stoichiometry to precipitation in Tibetan alpine grasslands. - Duan, Xiaoqing; Zhao, Guang; Cong, Nan; Zheng, Zhoutao; Zhu, Yixuan; Li, Shenggong; Yan, Jun; Cai, Mengke; Liu, Mengxue; Liu, Xiao (Journal of Plant Ecology, 2026)