Due to climate change affecting rainfall regimes, there is an increase in the frequency and size of landslides, especially in mountainous topographies with very high rainfall amounts. Although it is known that this situation affects the carbon storage capacity of the land, numerical data on this subject are insufficient. In this study; some soil properties were determined on soil samples taken from the landslide forest area and an adjacent non-landslide forest area in Trabzon Regional Directorate of Forestry. In addition, it was calculated how much carbon was stored in the topsoil in both areas. According to the research results, significant changes were detected in many properties of the forest soil after the landslide. It was determined that 65.33 Mg C/ ha of organic carbon was stored in the topsoil in the forest area (spruce stand), while 15.48 Mg C/ha of carbon was stored in the landslide area. Therefore, it was observed that there was a 76.31% decrease in carbon stocks in the topsoil in the forest area after the landslide. It was also concluded that landslides may reduce the carbon storage capacity of the topsoil due to the change in soil texture. Therefore, priority should be given to modeling studies to determine the effect of landslides on carbon sinks in the Black Sea Region, which has a steep topography with high rainfall. In addition, research should be conducted to reduce the effect of the landslide or to reveal the processes related to the carbon storage capacity after the landslide.