Principal role of fungi in soil carbon stabilization during early pedogenesis in the high Arctic.

ABSTRACT: Climate warming is causing widespread deglaciation and pioneer soil formation over glacial deposits. Melting glaciers expose rocky terrain and glacial till sediment that is relatively low in biomass, oligotrophic, and depleted in nutrients. Following initial colonization by microorganisms, glacial till sediments accumulate organic carbon and nutrients over time. However, the mechanisms driving soil nutrient stabilization during early pedogenesis after glacial retreat remain unclear. Here, we traced amino acid uptake by microorganisms in recently deglaciated high-Arctic soils and show that fungi play a critical role in the initial stabilization of the assimilated carbon. Pioneer basidiomycete yeasts were among the predominant taxa responsible for carbon assimilation, which were associated w

SUBMITTER: Trejos-Espeleta JC 

PROVIDER: S-EPMC11252988 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature