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The aim is to understand how soil organic carbon responds to different hydrological conditions in the Dongting Lake Basin.

July 1, 2026LandOpen Access

Vertical Distribution and Stability of Soil Carbon Pools Across Ecological Zones in the Dongting Lake Basin

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The aim is to understand how soil organic carbon responds to different hydrological conditions in the Dongting Lake Basin.
Examined vertical and spatial variations of soil carbon fractions and nutrient stoichiometry at four sites across depths of 0–200 cm.
Analyzed particulate organic carbon, mineral-associated organic carbon, and total nutrient concentrations in five defined soil layers.
Assessed the interactions between nutrient levels and soil texture to determine their effects on carbon pool characteristics.
SOC and total nitrogen decreased significantly with depth, particularly below 60 cm (p < 0.05).
The POC/MAOC ratio indicated that Tuanzhou was POC-dominated, whereas other sites were MAOC-dominated (ratio < 1).
Regional variations in nutrient regulation significantly affected carbon fraction characteristics.

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Examines soil carbon differences across ecological zones, highlighting implications for carbon stabilization in wetlands.

Liang et al. (2026) studied this question.

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