Moderate increase of precipitation stimulates CO₂ production by regulating soil organic carbon in a saltmarsh.

ABSTRACT: Saltmarsh is widely recognized as a blue carbon ecosystem with great carbon storage potential. Yet soil respiration with a major contributor of atmospheric CO₂ can offset its carbon sink function. Up to date, mechanisms ruling CO₂ emissions from saltmarsh soil remain unclear. In particular, the effect of precipitation on soil CO₂ emissions is unclear in coastal wetlands, due the lack of outdoor data in real situations. We conducted a 7-year field manipulation experiment in a saltmarsh in the Yellow River Delta, China. Soil respiration in five treatments (-60%, -40%, +0%, +40%, and + 60% of precipitation) was measured in the field. Topsoils from the last 3 years (2019-2021) were analyzed for CO₂ production potential by microcosm experiments. Furth

SUBMITTER: Zhang L 

PROVIDER: S-EPMC10847529 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature