Spatial variation in dissolved organic matter in a vegetation-restored ephemeral gully on the semi-arid region

Chen, Guo; Wang, Hao; Li, Ming; Zhang, Qingwei; Jian, Wang; Geng, Ren; He, Xinhua

doi:10.1016/j.catena.2023.107452

CATENA

2023

DOI: 10.1016/j.catena.2023.107452

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Spatial variation in dissolved organic matter in a vegetation-restored ephemeral gully on the semi-arid region

Guo Chen

Hao Wang

Ming Li

et al.

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2024

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Cited by 1 publication

References 70 publications

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Variation of Dissolved Organic Matter Chemistry in the Runoff From Slopes Covered With Biocrusts Under Rainfall: Insights From the Linkages Between the Optical and Molecular Composition Analyses

Chen,

Wang,

Zhang

et al. 2024

Land Degrad Dev

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Variation of dissolved organic matter (DOM) largely affects the regional and even global carbon cycle. Both optical techniques and ultra‐high‐resolution mass spectrometry have their advantages and disadvantages, and the combination of them can better track DOM cycles. However, the relationship between the optical and molecular characteristics of DOM in the runoff from slopes covered with biocrusts are still unclear. Therefore, optical techniques and Fourier transform ion cyclotron resonance mass spectrometry (FT‐ICR MS) were combined to explore the DOM composition in the runoff from different runoff plots (i.e., bare runoff plot [BP], cyanobacterial crusts covered runoff plot [CP], mixed crusts covered runoff plot [MIP], moss crusts covered runoff plot [MOP]) under different rainfall intensities in the current study. The findings stated that the runoff from BP and CP exhibited a higher proportion of terrestrial DOM under heavy rainfall intensity (HRI), whereas DOM in the runoff from MIP and MOP were primarily controlled by microbial sources. The DOM unique molecules in the runoff from CP were more recalcitrant under HRI than those under light rainfall intensity (LRI), and these differences decreased with the increased with the succession stage of biocrusts. The results of aromaticity characterized by optical method and FT‐ICR MS were generally consistent. Meanwhile, Spearman correlation analysis also indicated that the optical parameters can be utilized for the estimation of molecular characteristics and labile in the runoff from slopes covered with biocrusts after the necessary calibration of the correction between the optical and molecular parameters.

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Variation of Dissolved Organic Matter Chemistry in the Runoff From Slopes Covered With Biocrusts Under Rainfall: Insights From the Linkages Between the Optical and Molecular Composition Analyses

Chen,

Wang,

Zhang

et al. 2024

Land Degrad Dev

View full text Add to dashboard Cite

show abstract

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Spatial variation in dissolved organic matter in a vegetation-restored ephemeral gully on the semi-arid region

Cited by 1 publication

References 70 publications

Variation of Dissolved Organic Matter Chemistry in the Runoff From Slopes Covered With Biocrusts Under Rainfall: Insights From the Linkages Between the Optical and Molecular Composition Analyses

Variation of Dissolved Organic Matter Chemistry in the Runoff From Slopes Covered With Biocrusts Under Rainfall: Insights From the Linkages Between the Optical and Molecular Composition Analyses

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