Climate warming and elevated CO₂ alter peatland soil carbon sources and stability.

ABSTRACT: Peatlands are an important carbon (C) reservoir storing one-third of global soil organic carbon (SOC), but little is known about the fate of these C stocks under climate change. Here, we examine the impact of warming and elevated atmospheric CO₂ concentration (eCO₂) on the molecular composition of SOC to infer SOC sources (microbe-, plant- and fire-derived) and stability in a boreal peatland. We show that while warming alone decreased plant- and microbe-derived SOC due to enhanced decomposition, warming combined with eCO₂ increased plant-derived SOC compounds. We further observed increasing root-derived inputs (suberin) and declining leaf/needle-derived inputs (cutin) into SOC under warming and eCO₂. The decline in SOC compounds with warming and

SUBMITTER: Ofiti NOE 

PROVIDER: S-EPMC10662476 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature