Plant uptake of available N from different layers varies among species in an alpine meadow of permafrost regions on the Qinghai-Tibetan Plateau - Fei Peng; Jianbo Sun; Chimin Lai; Weisong Liu; Chengyang Li; Xiaojie Chen; Ben Chen; Xian Xue; Ji Chen; Carly Stevens (Soil Ecology Letters, 2026)