Abstract
The effect of climate warming on soil organic carbon (SOC) of sediment in wetlands is important for accurately projecting SOC content. Thus, understanding the mechanism influencing SOC content under climate warming is necessary. Field investigation and a laboratory incubation experiment were conducted in Hulunbeier steppe wetland during 2016 and 2017. Four types of wetland were selected to incubate with ambient temperature and temperature increased by 2.5 °C. The results showed that SOC content was negatively affected by temperature warming. The SOC content reduction in sediment caused by increasing temperature was ranged from − 2.34 to 39.52%. In addition, the content of sand, silt, total phosphorus (TP), calcium phosphate tribasic (Ca-P), total nitrogen (TN), and sediment moisture (MC) should be considered in models of SOC content in steppe wetland. However, it requires further validation, in particular how SOC content varies with warming temperatures, the duration of incubation, and other abiotic and biotic factors. These findings provide evidence that both climate warming and original characteristics of sediment can control the SOC storage dynamics in the steppe wetland.
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Acknowledgments
Thanks staff from Huihe National Nature Reserve and Ewenke country environmental protection bureau for offering their help.
Funding
This work was financially supported by National Key Research & Developmental Program of China (2018YFF0213405, 2018YFC0507304, and 2017YFC0504004) and Specific Research on Public Service of Environmental Protection in China (JY-201509040).
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The authors declare that they have no conflict of interest. The funding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.
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Highlights
• SOC content in sediments was decreased in the order of marsh wetland > reservoir wetland > river wetland > freshwater lake wetland.
• Temperature warming had a negative effect on SOC accumulation of sediments in steppe wetland.
• Sediment moisture, TP, Ca-P, TN and silt all had positive effects on SOC accumulation of sediments in steppe wetland.
• Sand content had a negative effect on SOC accumulation of sediments in steppe wetland.
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He, J., Xie, J., Su, D. et al. Organic carbon storage and its influencing factors under climate warming of sediments in steppe wetland, China. Environ Sci Pollut Res 27, 19703–19713 (2020). https://doi.org/10.1007/s11356-020-08434-8
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DOI: https://doi.org/10.1007/s11356-020-08434-8