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| Effects of Changes of Typical Climate/Environmental Factors on Soil Carbon Sequestration Potential in Jiuduansha Wetland, China |
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| KeyWord:global change; estuary wetland; carbon cycle; artificial climatic chamber |
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| Abstract: |
| The organic carbon reservation capability in soil has great significance on reduction of the greenhouse gases release and relief of global warming. With the further global climate warming, it has gradually attracted more and more attentions on the research of the soil respiration and carbon sequestration in coastal salt marsh. Jiuduansha wetland with many important ecological functions is the most impermanent original ecological coast salt marsh ecosystem in the Yangtze River estuary, and its carbon sequestration function is of great significance to the balance of carbon emissions in Shanghai. In this study, the possible effects of the changes of some typical climate/environment factors such as warming, atmospheric CO2 enrichment and inorganic nitrogen addition on soil carbon accumulation ability in Jiuduansha wetland were studied.The results showed that both considering of soil respiration and plant biomass, warming, atmospheric CO2 enrichment and inorganic nitrogen addition, respectively, within certain ranges could increase the soil organic carbon accumulation ability comparing with the control. Warming combined with inorganic nitrogen addition also could enhance the soil organic carbon accumulation ability. However, atmospheric CO2 enrichment combined with aggravated water eutrophication prompted the issue of soil organic carbon, which ultimately decreased the soil organic carbon accumulation ability. Atmospheric CO2 enrichment combined with warming had no significantly effect on soil organic accumulation capability of Jiuduansha wetland. Warming, atmospheric CO2 enrichment combined with inorganic nitrogen addition could prompte the issue of soil organic carbon, which ultimately decreased the soil organic carbon accumulation ability. So, the situation of warming, atmospheric CO2 enrichment combined with inorganic nitrogen addition should be avoid as far as possible in the further for keeping organic carbon reservation capability of Jiuduansha wetland . |
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