Abstract
As a significant reservoir of organic carbon (OC), natural wetlands play an important role in mitigating greenhouse effects. To determine what factors might influence OC, we analyzed the distributions of dissolved organic carbon (DOC), light fraction organic carbon (LFOC), and heavy fraction organic carbon (HFOC) in sediments taken from the Yanghe River Wetland (YRW) and assessed the effects of several environmental variables on the distribution of the different carbon types. The microbial community abundances and compositions of the sampled sediments were analyzed by 16S rRNA amplicon sequencing. Redundancy analysis (RDA) was used to reveal the environmental factors that affect the distribution of OC. The DOC and LFOC contents varied significantly in the research area, while HFOC content showed no variation. The DOC content was significantly affected by sediment pH, vegetation height, and microbial abundances, and the LFOC content was significantly affected by water pH. We also proposed a novel indicator to study the microbial effect on the distribution of OC content in wetlands: weighted abundance of related microbes (WARM). This study identifies the environmental factors that could affect the distribution of OC in a riverine wetland and outlines the calculation of a novel indicator.
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The authors thank for the English editing of Editage.
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This work was supported by the China Major Science and Technology Program for Water Pollution Control and Treatment (2017ZX07101003), and the Natural Science Foundation of Shandong Province, China (ZR2017MC013).
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Dong, J., Zhao, D., Zhang, C. et al. Factors controlling organic carbon distributions in a riverine wetland. Environ Sci Pollut Res 27, 34529–34540 (2020). https://doi.org/10.1007/s11356-020-09685-1
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DOI: https://doi.org/10.1007/s11356-020-09685-1