Calohypnum plumiformewas sampled from Heishiding Nature Reserve and transplanted into 48 trays. After acclimation, trays were assigned to Control (CT, regular watering) or four desiccation-rewetting cycles (6-day dry/6-day wet). Green parts (GP), brown parts (BP), and soil were sampled at each cycle's end. Multi-omics sequencing of GP included: (1) Amplicons (16S V3-V4/ITS1, Illumina NovaSeq); (2) Metagenomics (Illumina, functional annotation via eggNOG/KEGG); (3) Metabolomics (LC-MS, Orbitrap).