The four fastq files available here correspond to the ones generated and analysed in this PhD thesis. Details about the samples collection and processing can be found in the thesis manuscript. 4296-2-00_S1_L001_R1_001.fastq.gz Sample collected on the Sairecabur at 4296 m, surface level. Second sample of the duplicate. 5056-01_S3_L001_R1_001.fastq.gz Sample collected on the Sairecabur at 5056 m, 1 cm deep. 5269-1-00_S4_L001_R1_001.fastq.gz Sample collected on the Sairecabur at 5269 m, surface level. First sample of the duplicate. Ata-2-15_S2_L001_R1_001.fastq.gz Sample collected in the Atacama, 15 cm deep. Second sample of the duplicate.