Assessing environmental gradients in relation to dark CO₂ fixation in estuarine wetland microbiomes.

ABSTRACT: The rising atmospheric concentration of CO₂ is a major concern to society due to its global warming potential. In soils, CO₂-fixing microorganisms are preventing some of the CO₂ from entering the atmosphere. Yet, the controls of dark CO₂ fixation are rarely studied in situ. Here, we examined the gene and transcript abundance of key genes involved in microbial CO₂ fixation along major environmental gradients within estuarine wetlands. A combined multi-omics approach incorporating metabarcoding, deep metagenomic, and metatranscriptomic analyses confirmed that wetland microbiota harbor four out of seven known CO₂ fixation pathways, namely, the Calvin cycle, reverse tricarboxylic acid cycle, Wood-Ljungdahl pathway, and re

SUBMITTER: Gruterich L 

PROVIDER: S-EPMC11784365 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature