Microcosms experiment of soils amended with leaf litter

This study investigates the impact of small-scale variations in leaf litter placement within the soil-water interface on greenhouse gas emissions in wetland ecosystems. Wetlands are crucial for global carbon cycling, serving as both significant carbon sinks and sources of carbon dioxide and methane. Leaf litter, primarily from local vegetation, contributes to soil organic carbon and drives the decomposition processes that produce these greenhouse gases. While much research has focused on the factors influencing leaf litter decomposition, the effect of millimeter-scale differences in leaf litter burial depth on carbon dioxide and methane fluxes has been largely overlooked. The study hypothesizes that such minor variations in burial depth can significantly influence gas emission patterns. A controlled microcosm experiment was conducted to measure gas fluxes and analyze physicochemical properties of the SWI under treatments with leaf litter placed at two different depths. Results show that even slight shifts in litter position can dramatically alter carbon dioxide and methane emissions, revealing the sensitivity of wetland carbon dynamics to small-scale environmental changes. These findings highlight the importance of incorporating fine-scale variations into models that predict wetland contributions to global carbon fluxes and climate impact.