Independent response of soil DOM to MAT and MAP: Evidence from a large-scale survey of moss crusts in mainland China

Liu, Siwan; Fan, Linhua; Chang, Chao; Ge, Zhengkui; Ma, Ning; Chen, Wenbin; Yang, Fang; Pan, Baozhu; Li, Ming

doi:10.1016/j.ecolind.2022.109240

Cited by 5 publications

(1 citation statement)

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“…Dissolved organic matter (DOM), which is highly mobile and less inert, is the world's largest carbon reservoir (Inamdar et al, 2012;Yu et al, 2020), supplying both nutrient sources for plant roots and energy for microbial metabolism (Zhang et al, 2020). DOM interacts with water pollutants through various physical and chemical processes (Wen et al, 2016;He et al, 2022), and plays a role in the maintenance and release of nutrients and biological availability, having a signi cant impact on the material cycling of the ecosystem (Inamdar et al, 2012;Hao et al, 2017;D'Andrilli et al, 2019;Liu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Salinity fluctuations in a brackish-water lake influence the dissolved organic matter characteristics of pore water

Xie

Zuo

et al. 2023

Preprint

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The dissolved organic matter (DOM) compositions in lake water have been widely studied; however, it is not clear how salinity fluctuations in brackish lakes with reeds affect DOM transformation in pore water. This experiment included three salinity groups (1,200 mg/L, 3,600 mg/L, and 6,000 mg/L) to research the interactions between bacteria and DOM in sediments under a salinity gradient. The results showed that higher salinity reduced the Fmax of protein-like substances and resulted in DOM becoming more aromatic and endogenous. Salinity affected DOM compositions due to the responses of functional bacterial communities. Thiobacillus was salt-tolerant and dominated in the sediments, the relative abundances of which were negatively correlated with the Fmax of the protein-like components. The relative abundance of Flavobacterium showed a positive correlation with salinity and a negative correlation with the Fmax of fulvic acid-like and tryptophan-like components. Pseudomonas showed negative correlations with salinity and the Fmax of fulvic acid-like substances and a positive correlation with the Fmax of protein-like substances. Higher salinity inhibited the tryptophan degradation metabolic pathway and enhanced tryptophan biosynthesis. In addition, higher salinity simultaneously inhibited tyrosine biosynthesis and metabolism pathways. The results of this study may provide a new idea for understanding DOM cycling in brackish lake and organic pollution management.

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