Decipher the Persistence of Soil Dissolved Organic Matter Under Different Land Use Types Using Potential Molecular Transformations

Datos Bibliográficos

ID21647509
AutoresAoping Mao (School of Ecology and Nature Conservation Beijing Forestry University Beijing China), Jingming Zheng (0000-0001-5157-4758, School of Ecology and Nature Conservation Beijing Forestry University Beijing China, autor de correspondencia), Ziteng Wang (0000-0001-7763-8959, State Key Laboratory of Environment Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing China, autor de correspondencia), Fuhong Sun (0000-0002-2069-4973, State Key Laboratory of Environment Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing China), Yiwen Sang (State Key Laboratory of Environment Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing China), Yimin Sang (0000-0003-1828-3961, Beijing Forestry University), Xiuyuan Chen (0000-0002-5999-0227, State Key Laboratory of Environment Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing China), Yimiao Li (Beijing Forestry University), Yi-miao Li (0009-0008-1348-7360, School of Ecology and Nature Conservation Beijing Forestry University Beijing China), Anning Miao (School of Ecology and Nature Conservation Beijing Forestry University Beijing China)
Año2026
Volumen37
Número3
Páginas997-1010
Fecha de publicación2026-02-15
Open AccessSí
TipoARTICLE
RevistaLand Degradation and Development (JOURNAL)
Identificadores de la revistaISSN: 1085-3278 • E-ISSN: 1099-145X
EditorialWiley (PUBLISHER • GB)
DOI10.1002/ldr.70156
OpenAlexW4413802697
IdiomaEN
Referencias citadas60

Soil dissolved organic matter (SDOM), as the largest active carbon pool in terrestrial ecosystems, understanding its chemical composition and molecular transformation is of great significance for the global carbon cycle. However, due to the inherent complexity and dynamic nature of DOM in different ecosystems, the differences in molecular transformations under different land use types and the main factors affecting the transformations remain unclear. To address this issue, we employed ultrahigh‐resolution Fourier transform ion cyclotron resonance mass spectrometry (FT‐ICR MS) to analyze molecular transformation differences and their influencing factors in SDOM from five land use types: farmland (FL), forest (FR), grassland (GL), urban area (UA), and wetland (WL). The results showed that in human‐affected land use types, the transformations of aliphatic/peptide‐like compounds in FL and condensed aromatic compounds in UA were more abundant than in natural soil systems (FR, GL, and WL); the proportions accounted for 3–5 times and 1.5–100 times those of other land types, respectively. Random forest analysis identified two key factors influencing the intensity of transformation‐related molecules: Total phosphorus (TP) and Shannon index. Increased TP led to a decrease in intensity for unstable molecules involved in transformation, and enhanced Shannon index resulted in increased intensity of stable molecules (lignin compounds and condensed aromatic compounds) but decreased intensity of unstable molecules (aliphatic/peptide compounds). Compared to molecular intrinsic characteristics, the influence of external environmental factors on SDOM molecular transformation cannot be overlooked. Our findings highlight the importance of external environmental factors and chemodiversity in influencing molecular transformations, providing new insights for understanding the dynamic changes in soil carbon pools

Bioinformatics · Biology · DECIPHER · Geotechnical engineering · Organic matter · Soil organic matter · Soil water · Chemistry · Environmental Science · Isotope Analysis in Ecology · Marine and coastal ecosystems · Soil Carbon and Nitrogen Dynamics · Ecology · Environmental Chemistry · Geology · Soil Science