Shrub encroachment leads to accumulation of C, N, and P in grassland soils and alters C:N:P stoichiometry: A meta-analysis - Zhong Du; Huan Zheng; Josep Penuelas; Jordi Sardans; Dongzhou Deng; Xiaohu Cai; Decai Gao; Shirui Nie; Yanmin He; Xiaotao Lü; Mai-He Li (Science of The Total Environment, 2024)