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Spatiotemporal Variations in Soil Organic Carbon and Microbial Drivers in the Yellow River Delta Wetland, China

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  • Xinghua Wang

    (Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Jun Li

    (Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Luzhen Li

    (Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Yanke Guo

    (Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Beibei Guo

    (Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

  • Changsheng Zhao

    (Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

Abstract

This study explores the spatiotemporal dynamics of SOC and microbial-mediated mechanisms in the Yellow River Delta wetlands. Using redundancy analysis and microbial community profiling, we show that vegetation drives distinct SOC storage patterns: Phragmites australis ecosystems exhibit the highest SOC sequestration, followed by Suaeda salsa and Tamarix chinensis habitats, where salt-tolerant taxa like Desulfobacterota and Halobacteriaota promote short-term carbon storage via anaerobic metabolism. The microbial community structure is shaped by both vegetation-induced microhabitats and environmental gradients: SOC and total nitrogen dominate community assembly, while electrical conductivity, pH, and sulfur/nitrogen nutrients regulate spatiotemporal differentiation. Seasonal turnover drives the reorganization of microbial community structures, shaping the dynamic equilibrium of carbon pools. Seasonal DOC dynamics, linked to tidal fluctuations and exogenous carbon inputs, highlight hydrology’s role in modulating active carbon pools. These findings reveal tight linkages among vegetation, microbial functional guilds, and soil biogeochemistry, critical for wetland carbon sequestration.

Suggested Citation

  • Xinghua Wang & Jun Li & Luzhen Li & Yanke Guo & Beibei Guo & Changsheng Zhao, 2025. "Spatiotemporal Variations in Soil Organic Carbon and Microbial Drivers in the Yellow River Delta Wetland, China," Sustainability, MDPI, vol. 17(11), pages 1-19, June.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:11:p:5188-:d:1672159
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    References listed on IDEAS

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