N-induced soil acidification triggers metal stimulation of soil methane oxidation in a temperate steppe ecosystem - Lihua Zhang; Ivan A. Janssens; Xinhao Zhu; David Lipson; Donatella Zona; Fenghui Yuan; Nannan Wang; Yanyu Song; Changchun Song; Yowhan Son; Walter Oechel; Xiaofeng Xu (Soil Biology and Biochemistry, 2023)