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Spatial distribution of soil organic carbon across diverse vegetation types in a tidal wetland

  • 0School of Geography and Environment, Liaocheng University, Liaocheng 252000, China; CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, Shandong 264003, China; Yellow River Delta Field Observation and Research Station of Coastal Marsh Ecosystem, Chinese Academy of Sciences, Dongying 257000, Shandong, China.
Marine Pollution Bulletin +

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November 1, 2024

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November 1, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Tidal wetlands store significant soil organic carbon (SOC). Vegetation type, influenced by water and salt, dictates SOC levels, with low-tide saltmarsh showing the most carbon storage.

Area Of Science

  • Environmental Science
  • Soil Science
  • Coastal Ecology

Background

  • Tidal wetlands are crucial for global blue carbon sequestration.
  • Water and salt gradients in these ecosystems drive vegetation patterns and soil organic carbon (SOC) storage.

Purpose Of The Study

  • To investigate the impact of different vegetation types on SOC distribution in tidal wetlands.
  • To understand the relationship between environmental gradients and SOC accumulation.

Main Methods

  • Field sampling across four distinct intertidal regions with varying vegetation types (Suaeda salsa, Phragmites australis, Tamarix chinensis).
  • Laboratory analysis of soil organic carbon (SOC) content and vertical distribution.
  • Statistical analyses including Mantel analysis and Structural Equation Modeling (SEM) to determine influencing factors.

Main Results

  • Significant differences in SOC levels were observed across vegetation types, with low-tide saltmarsh (LS) exhibiting the highest SOC and Phragmites australis (P) the lowest.
  • Vertical variations in SOC were identified within a 1-meter soil profile.
  • Soil water content (SWC) was found to influence SOC by mediating vegetation type, which in turn regulates total soil carbon.

Conclusions

  • Vegetation type is a key determinant of SOC accumulation in tidal wetlands.
  • Environmental factors like SWC play a critical role in shaping vegetation and subsequent carbon storage.
  • Findings offer insights into the dynamics of soil carbon pools during vegetation succession in coastal ecosystems.

Keywords:

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