Abstract: The spatial distribution of soil elements in wetlands is affected by many environmental factors, among which the hydrological conditions regulate the soil elements through the change of hydrological cycle and the movement of surface water and groundwater. Since the Dongting Lake Wetland Ecosystem Research Station formally operated in 2009, according to the unified monitoring criteria of China Ecosystem Research Network (CERN), the main physical and chemical properties, nutrient elements and heavy metal contents of soil in the wetland ecosystem under the change of the hydrological situation of Dongting Lake have been measured for long-term locating and monitoring. The soil element content dataset of Dongting Lake beach from 2012 to 2016 were obtained by processing the surface soil element monitoring data of three typical wetland plants (Carex. sp, Triarrhena lutarioriparia and Polygonum hydropiper) in Dongting Lake. This data set contains 14 indicators, including organic matter, total nitrogen, total phosphorus, total potassium, available phosphorus, available potassium, total manganese, total iron, cadmium, lead, chromium, nickel, mercury and arsenic. The relative error rate of 14 indicators is 4.26% in average, with relative deviation of 3.77% in average. At the same time, complete background information is attached to ensure the temporal and spatial consistency of data. The dataset is expected to provide data support for soil nutrition assessment, environmental quality assessment, soil contamination risk assessment and environmental soil science research in Dongting Lake.
Keywords: nutrient element; heavy metal; soil pollution; wetland beach; long-term locating and monitoring