Kolbestånd i restaurerade våtmarker, En fältstudie av anlagda våtmarker i Lunds kommun

Sammanfattning: Sedimentation of organic carbon in shallow lakes and wetlands removes CO2 from the atmosphere and can be considered a natural carbon sink. Actions toward regulating restored wetlands as carbon sink would provide Lund municipality with solution to combat CO2 emission goals for the future. A field study was conducted collecting sediment samples from 6 constructed wetlands in Lund municipality, Sweden during March of 2020. The samples were tested regarding its organic carbon content using C/N-element-analyzer. The results were then upscaled and extrapolated to give an idea of the environmental relevance of these impoundments. This study showed that these restored wetlands were excellent carbon sinks with carbon capture as focus with yearly sedimentation rates of OC ranging between 0.48 and 3.76 tons/hectare. However, emissions of greenhouse gases should be taken into consideration for further evaluation. This study also tried to find out about the different interactions affecting accumulation rate of OC in wetland sediment. Using the collected calculated data OC sedimentation showed a positive correlation (p ≤ 0.5) to increasing catchment area and to increasing wetland size. The current observation numbers are however low to accurately pinpoint the different correlations.