Dissolved natural organic matter in Boreal soil waters Its sources, transport, and fate

Sammendrag

This study investigates the transport dynamics of dissolved organic matter (DOM) within the porewaters of peatlands at Langtjern, a boreal ecosystem in northern Norway. The objective was to enhance understanding of how hydrological gradients, organic matter dynamics, and biogeochemical controls interact to shape nutrient and carbon cycling in these climate-sensitive environments. Peatlands play a critical role in nutrient retention and carbon storage, making them essential components in the context of climate change and ecosystem resilience. The study examined the variability of DOM, pH, electrical conductivity (EC), oxidation-reduction (RedOx) conditions, key nutrients (dissolved nitrogen and phosphorus), and major cations and anions across different peat types. Results revealed pronounced spatial and temporal variability in these parameters, underscoring the complexity of biogeochemical processes that govern the mobility and distribution of nutrients and carbon. The findings highlight the pivotal role of hydrological flow paths in controlling nutrient transport and emphasize the need to consider these dynamics in strategies for peatland management, conservation, and climate change adaptation.