Land cover types and depth regulate carbon and nitrogen cycle functional genes in permafrost regions on the Qinghai-Tibet Plateau - Xiaoying Fan; Xiaodong Wu; Dejincuo Ma; Tonghua Wu; Guimin Liu; Haiyan Xu; Defu Zou; Guojie Hu; Yadong Liu; Xianhua Wei; Xuchun Yan; Yongxiang Liu; et al. (Plant and Soil, 2025)