Global soil available phosphorus alters the upper limit of plant diversity impact on terrestrial productivity - Xiaodong Yuan; Xiaoyong Bai; Zhongfa Zhou; Shiqi Tian; Junhan Li; Sirui Zhang; Lian Xiong; Jingjing Liao; Chaochao Du; Yu Jiang; Qunqun Deng; Yuanhuan Xie (Global and Planetary Change, 2026)