Data from Uncovering diversity and abundance patterns of CO2-fixing microorganisms in peatlands

Microorganisms play a crucial role in the carbon (C) dynamics of peatlands— a major terrestrial C reservoir. Because of their role in C emissions, heterotrophic microorganisms have attracted much attention over the past decades. CO2-fixing microorganisms (CFMs) remained largely overlooked, while they could attenuate C emissions. Here we use metabarcoding and digital droplet PCR to survey microorganisms that potentially fix CO2 in different peatlands. We demonstrate that CFMs are abundant and diverse in peatlands, with on average 1,021 CFMs contributing up to 40% of the total bacterial abundance. Using a joint-species distribution model, we identified a core and a specific CFM microbiome, the later being influenced by temperature and nutrients. Our findings highlight that ASV richness and community structure were direct drivers of abundance, while environmental parameters were indirect drivers. These results provide the basis for a better understanding of the role of CFMs in peatland C cycle inputs. This repository only provides the Data that is needed for the repository on GitHub: https://github.com/vjassey/Diversity_CFMs_peatlands.