The study looked at how different types of plants in wetlands affect the amount and stability of carbon in the soil. They found that willow and poplar wetlands store more carbon than lake-sedge and reed wetlands. However, the carbon in willow and poplar wetlands is less stable. Willow wetlands have the highest stability of carbon. The type of plants in wetlands affects the amount and structure of carbon in the soil, which can impact how much carbon is stored and how it cycles in wetland ecosystems. Willow forests in wetlands are the most promising for increasing carbon storage in the soil.