Microbial residues as the nexus transforming inorganic carbon to organic carbon in coastal saline soils

Shao, Ping; Li, Tian; Dong, Kaikai; Yang, Hongjun; Sun, Jingkuan

doi:10.1007/s42832-021-0118-y

Cited by 8 publications

(4 citation statements)

References 51 publications

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“…Recent evidences suggest that SOM formation is independent of chemical recalcitrance and that large proportions of SOM are directly derived from microbial‐derived necromass (Joergensen, 2018; Liang et al, 2017). In this study, we collected data of microbial residue C in whole coastal wetlands of China (Shao et al, 2022; Q. Li, Z. Song, S. Xia, L. Guo, B. P. Singh, Y. Shi, W. Wang, Y. Luo, Y. Li, J. Chen, J. Zhang, S. Sun, & H. Wang, Unpublished), and compared the contribution of lignin and microbial necromass C to SOC accumulation in coastal wetlands at a broader scale (Figure S9).…”

Section: Discussionmentioning

confidence: 99%

Patterns and determinants of plant‐derived lignin phenols in coastal wetlands: Implications for organic C accumulation

et al. 2023

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1. As a major plant-derived soil organic carbon (SOC) component, lignin phenols are unique biomarkers that reflect biogeochemical characteristics under different vegetation compositions and climatic zones in coastal wetlands. However, the latitudinal patterns of plant-derived lignin phenols to SOC and their link with the stability and controlling mechanisms remain poorly understood.2. A total of 156 soil samples from 39 sites along a 5000 km coastal transect, were taken to explore the effects of biological and environmental controls on the patterns of lignin phenols. Lignin phenols had contents ranging from 1.91 to 83.3 mg g −1 OC, and a positive correlation was detected in grass-dominated salt marsh, but a weakly negative correlation in mangrove. Positive correlations between SOC or lignin content and C/V or S/V (the cinnamyl-or syringyl-tovanillyl) ratios were found, while overall negative correlations between SOC or lignin content and (Ad/Al) V or (Ad/Al) S (the acid-to-aldehyde of vanillyl or syringyl units) ratios were detected, respectively, which confirmed the validity of these lignin biomarker degradation parameters.3. Our findings revealed that plant C inputs and monomer ratios directly influenced the capacity of lignin phenols in soils. Lignin content and stabilization was mainly controlled by soil properties (i.e. pH, EC sand/clay). Mean annual temperature (MAT) influenced the patterns of lignin phenols both directly by increasing decomposition and indirectly by changing the vegetation and soil biogeochemistry (i.e. microbial substrate availability).

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Section: Discussionmentioning

confidence: 99%

Patterns and determinants of plant‐derived lignin phenols in coastal wetlands: Implications for organic C accumulation

et al. 2023

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“…Plant inputs stimulate the activity and size of the soil microbial community, which could enhance the nutrient cycle and reduce soil pH of saline-alkali soil (Li et al, 2022;Liu et al, 2022;Rathore et al, 2022). Microbial biomass and the resulting microbial necromass, part of which can be relatively recalcitrant, provides binders for aggregates that physically protect soil organic matters and improve soil structure (Bronick and Lal, 2005;Zhu et al, 2018;Zhu et al, 2020;Shao et al, 2022). In this study, MB increased in halophytes field, and the response showed a strong correlation with desalinization effect, which highlights the importance of microbes in the process of soil improvement during desalinization (Figure 6).…”

Section: Aboveground Accumulation and Rootsoil Interaction Of Desalin...mentioning

confidence: 99%

Performance of halophytes in soil desalinization and its influencing factors: a meta-analysis

Wang,

Liu,

Wang

et al. 2023

Front. Environ. Sci.

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Soil salinization threatening natural and agricultural production challenges global food security. Halophytes are of great interest in soil desalinization in recent years; yet, there is a lack of a comprehensive quantitative overview of biotic and abiotic factors for halophytes’ desalinization performance across global scales. Here, a meta-analysis was conducted using 400 observations from 53 peer-reviewed studies to assess desalinization by halophytes in relation to 27 variables. Results showed that soil salinity was significantly decreased in halophytes field on average by 37.7% compared to control on a global scale (p < 0.05). Desalinization performance was better in cold and hot regions than in temperate regions, in dry regions than in wet regions, in alkaline saline soils than in neutral saline soils, and in conditions with low sand content than high sand content. Under aboveground harvest treatment, desalinization increased with the years of cultivation, while no trends were detected under no harvest treatment, indicating the importance of aboveground accumulation. Desalinization was not related to soil CaCO3 content but was accompanied by soil structure improvement, nutrition enrichment, and microbe propagation, implying other root-microbe-soil interactions rather than CaCO3 dissolution play important roles. Shoot biomass could be used as an indicator of the desalinization performance, and the performance would not be decreased due to the high uptake selectivity for K+ over Na+. Notably, desalinization was similar in the pot experiments and field experiments, but pot experiments would magnify the contribution of aboveground salt accumulation to desalinization. Our findings can help to expand the applicability and efficiency of halophytes for sustainable agricultural development in saline soils.

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“…The importance of soil microbes in transforming plant-derived organic matter and in fostering the formation of soil organic matter (SOM) have gained widespread acceptance but has been largely overlooked as a primary pathway of SOM formation until recently (Bardgett et al, 2008;Heimann and Reichstein, 2008;Schimel and Schaeffer, 2012;Kallenbach et al, 2016;Lu et al, 2018;Zhu et al, 2020). The sequestration of SOM depends on microbial metabolic pathways, mainly involving the decomposition, transformation and sequestration of organic matter, which is ultimately determined by microbial species and community diversity (Benner, 2011;Ludwig et al, 2015;Liang, 2020;Shao et al, 2021;Wang et al, 2021a). Determining how the soil microbial community regulates C fluxes and therefore controls biogeochemical cycling and climate change is urgent (Bond-Lamberty et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Bacterial biogeography in China and its association to land use and soil organic carbon

Lei

et al. 2023

Soil Ecol. Lett.

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6102 high-quality sequencing results of soil bacterial samples were re-analyzed. • The type of land use was the principal driver of bacterial richness and diversity.• SOC content is positively correlated with key bacteria and total nitrogen content. Soil organic carbon (SOC) is the largest pool of carbon in terrestrial ecosystems and plays a crucial role in regulating atmospheric CO 2 concentrations. Identifying the essential relationship between soil bacterial communities and SOC concentration is complicated because of many factors, one of which is geography. We systematically reanalyzed 6 102 high-quality bacterial samples in China to delineate the bacterial biogeographic distribution of bacterial communities and identify key species associated with SOC concentration at the continental scale. The type of land use was the principal driver of bacterial richness and diversity, and we used machine learning to calculate its influence on microbial composition and their co-occurrence relationship with SOC concentration. Cultivated land was much more complex than forest, grassland, wetland and wasteland, with high SOC concentrations tending to enrich bacteria such as Rubrobacter, Terrimonas and Sphingomona. SOC concentration was positively correlated with the amounts of soil total nitrogen and key bacteria Xanthobacteraceae, Streptomyces and Acidobacteria but was negatively correlated with soil pH, total phosphorus and Micrococcaceae. Our study combined the SOC pool with bacteria and indicated that specific bacteria may be key factors affecting SOC concentration, forcing us to think about microbial communities associated with climate change in a new way.

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Microbial residues as the nexus transforming inorganic carbon to organic carbon in coastal saline soils

Cited by 8 publications

References 51 publications

Patterns and determinants of plant‐derived lignin phenols in coastal wetlands: Implications for organic C accumulation

Patterns and determinants of plant‐derived lignin phenols in coastal wetlands: Implications for organic C accumulation

Performance of halophytes in soil desalinization and its influencing factors: a meta-analysis

Bacterial biogeography in China and its association to land use and soil organic carbon

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