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Spatial Analysis of Land Use Change Effect on Soil Organic Carbon Stocks in Sanjiang Plain of China between 1980 and 2016

Marsh–wetland, as an important type of wetlands, is a synthetic natural ecosystem with rich soil organic carbon. The largest area of marsh–wetland was located in Sanjiang Plain in the Northeast China and obvious land use changes have occurred during the last 50 years with large area of marsh–wetland cultivated to farmland which had a big impact on soil organic carbon stock. In this study, spatial distributions of 0–20cm soil organic carbon sources and sinks in Sanjiang Plain were investigated from 1980 to 2016.