Artikel bekijken

Peat decomposition processes account for~ 2% of the annual anthropogenic greenhouse gas emissions (GHG). The rate of microbial peat respiration is determined by temperature, the quality and abundancy of organic matter, moisture and electron acceptor (such as O 2, Fe [III], SO 4 2-) availability. The redox potential and pH reflect the chemical state of the soil and are an indicator for biogeochemical metabolic processes that occur within the soil. Here, we introduce a novel methodology to estimate peatland GHG emission (CO 2 and CH 4) by linking soil temperature and redox potential over time and depth with aerobic and anaerobic CO 2 and CH 4 incubation fluxes. Soil metabolic processes (at 0.1, 0.3, 0.5, 0.7 and 0.9 m depth) were classified based on the redox potential and pH. Individual rates of CO 2 and CH 4 emission (based on newly acquired and literature lab incubation data) were assigned to aerobic …