Distribution and accumulation of soil carbon in temperate wetland,northeast China |
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| Authors: | Mingzhi Lyu Lianxi Sheng Zhongsheng Zhang Li Zhang |
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| Institution: | 1.Northeast Normal University,Changchun,China;2.State Environment Protection Key Laboratory of Wetland Ecology and Vegetation Restoration,Changchun,China;3.Key Laboratory of Wetland Ecology and Environment,Institute of Northeast Geography and Agroecology, Chinese Academy of Sciences,Changchun,China;4.Everglades Wetland Research Park,Florida Gulf Coast University,Naples,U.S.A. |
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| Abstract: | Estimating carbon sequestration and nutrient accumulation rates in Northeast China are important to assess wetlands function as carbon sink buffering greenhouse gas increasing in North Asia. The objectives of this study were to estimate accreting rates of carbon and nutrients in typical temperate wetlands. Results indicated that average soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) contents were 37.81%, 1.59% and 0.08% in peatlands, 5.33%, 0.25% and 0.05% in marshes, 2.92%, 0.27% and 0.10% in marshy meadows, respectively. Chronologies reconstructed by 210Pb in the present work were acceptable and reliable, and the average time to yield 0–40 cm depth sediment cores was 150 years. Average carbon sequestration rate (Carbonsq), nitrogen and phosphorus accumulation rates were 219.4 g C/(m2·yr), 9.16 g N/(m2·yr) and 0.46 g P/(m2·yr) for peatland; 57.13 g C/(m2·yr), 5.42 g N/(m2·yr) and 2.16 g P/(m2·yr) for marshy meadow; 78.35 g C/(m2·yr), 8.70 g N/(m2·yr) and 0.71 g P/(m2·yr) for marshy; respectively. Positive relations existed between Carbonsq with nitrogen and precipitations, indicating that Carbonsq might be strengthened in future climate scenarios. |
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