LDSF Topsoil Soil Organic Carbon (SOC)
This map shows the distribution of predicted topsoil (0-20cm) soil organic carbon (SOC). The highest concentration of SOC was found in the forests at the top of the watershed and the lowest in the southeast. Soil organic carbon (SOC) is a key indicator of soil health and is a critical component to numerous ecosystems service. SOC is derived from organic materials from plant detritus, roots, leaves and stems, and the bodies of soil organisms. SOC provides the metabolic substrate required by microorganisms that ensure the cycling, storage and availability of many plant nutrients and thus has implications for the long-term sustainability of food, fuel and timber provisioning services. SOC also contributes to soil structure and can affect soil compaction, and the infiltration and retention of water which influences water quality and quantity and flooding.
There was a wide range of values for SOC across the watershed (Figure 16, and 17) with significant differences in SOC concentrations in the topsoil (p < 0.03) and subsoil (p <0.001) among LULC classes. There were no significant differences due to, elevation or slope.
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