Isotopic and spectral signatures unravel the sources, preservation and degradation of sedimentary organic matter in the Dongzhai Harbor mangrove estuary, southern China

Yan, Lu; Xie, Xianjun; Heiss, James W.; Peng, Kang-Lin; Deng, Yamin; Gan, Yiqun; Li, Qinghua; Zhang, Yanpeng

doi:10.1016/j.jhydrol.2023.129256

Journal of Hydrology

2023

DOI: 10.1016/j.jhydrol.2023.129256

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Isotopic and spectral signatures unravel the sources, preservation and degradation of sedimentary organic matter in the Dongzhai Harbor mangrove estuary, southern China

Lu Yan

Xianjun Xie

James W. Heiss

et al.

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Cited by 11 publications

References 94 publications

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Role of Iron in Stabilization of Soil Organic Carbon Under Different Vegetation Communities of Mangrove Wetlands

Zhao,

Tan,

Zhang

et al. 2024

Land Degrad Dev

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Iron (Fe) oxides play an important role in maintaining soil organic carbon (SOC) stability. However, little attention has been paid to the role of Fe oxides in preserving SOC in mangrove wetlands with different vegetation communities. In this study, four soils of dominant vegetation communities: Phragmites australis (PA), Acanthus ilicifolius (AI), Sonneratia apetala (SA), and mixed soils of S. apetala and A. ilicifolius (SA + AI) were selected from mangrove wetland of Qi'ao Island. The distributions of Fe‐bound organic carbon (OC‐Fe) and Fe oxides (Feo, acid oxalate‐extractable Fe; Fep, pyrophosphate‐extractable Fe), and the role of soil factors in SOC conservation were investigated. The results showed that soil OC‐Fe content ranged from 1.03 to 4.96 g/kg, with a contribution to SOC ranging from 5.97% to 24.07%, which was highest in SA + AI (3.58 ± 0.94 g/kg), followed by PA (2.67 ± 1.07 g/kg), SA (1.88 ± 0.43 g/kg), and AI (1.82 ± 0.32 g/kg). The Fep content was higher in the PA and SA + AI, however, the Feo content was lower. Structural equation modeling indicated that SOC, Feo, and Fep were direct drivers of OC‐Fe formation. Overall, the aboveground biomass of different vegetation communities indirectly affected the OC‐Fe content by regulating SOC inputs. High water contents, low oxygen conditions, and near‐neutral soils in mangrove wetlands favor OC‐Fe formation between Fe oxides and SOC by co‐precipitation or complexation. This study highlights the importance of mangrove wetland vegetation communities in Fe‐C coupling, while providing theoretical support for the study of carbon cycling processes in mangrove wetlands.

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Role of Iron in Stabilization of Soil Organic Carbon Under Different Vegetation Communities of Mangrove Wetlands

Zhao,

Tan,

Zhang

et al. 2024

Land Degrad Dev

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Optical signatures as a diagnostic tool for tracking dynamics of sedimentary dissolved organic nitrogen, phosphorus, and sulfur in an anthropogenic bay

Zhang,

Zhao,

Chen

et al. 2025

Chemical Geology

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Profile of Pangpang Bay (Banyuwangi, Indonesia) based on water, sediment type, and macrobenthic diversity

Suciyono,

Kenconojati,

Ulkhaq

et al. 2024

Egyptian Journal of Aquatic Research

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Isotopic and spectral signatures unravel the sources, preservation and degradation of sedimentary organic matter in the Dongzhai Harbor mangrove estuary, southern China

Cited by 11 publications

References 94 publications

Role of Iron in Stabilization of Soil Organic Carbon Under Different Vegetation Communities of Mangrove Wetlands

Role of Iron in Stabilization of Soil Organic Carbon Under Different Vegetation Communities of Mangrove Wetlands

Optical signatures as a diagnostic tool for tracking dynamics of sedimentary dissolved organic nitrogen, phosphorus, and sulfur in an anthropogenic bay

Profile of Pangpang Bay (Banyuwangi, Indonesia) based on water, sediment type, and macrobenthic diversity

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