Archaeal contribution to carbon-functional composition and abundance in China’s coastal wetlands: Not to be underestimated

Yang, Meiling; Liu, Na; Wang, Baoli; Li, Yajun; Li, Jianfeng; Liu, Cong‐Qiang

doi:10.3389/fmicb.2022.1013408

Cited by 3 publications

(1 citation statement)

References 53 publications

(61 reference statements)

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“…These biogeochemical processes are distinctly different from terrestrial ecosystems. Vegetation growth is a critical aspect of developing ecosystem functions for coastal estuarine wetlands. ,, Soil salinization reduces water availability to wetland plants, thereby inhibiting plant growth, soil fertility, and biodiversity. − …”

Section: Discussionmentioning

confidence: 99%

Microbial Necromass, Lignin, and Glycoproteins for Determining and Optimizing Blue Carbon Formation

Li,

Song,

Xia

et al. 2023

Environ. Sci. Technol.

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Coastal wetlands contribute to the mitigation of climate change through the sequestration of "blue carbon". Microbial necromass, lignin, and glycoproteins (i.e., glomalinrelated soil proteins (GRSP)), as important components of soil organic carbon (SOC), are sensitive to environmental change. However, their contributions to blue carbon formation and the underlying factors remain largely unresolved. To address this paucity of knowledge, we investigated their contributions to blue carbon formation along a salinity gradient in coastal marshes. Our results revealed decreasing contributions of microbial necromass and lignin to blue carbon as the salinity increased, while GRSP showed an opposite trend. Using random forest models, we showed that their contributions to SOC were dependent on microbial biomass and resource stoichiometry. In N-limited saline soils, contributions of microbial necromass to SOC decreased due to increased N-acquisition enzyme activity. Decreases in lignin contributions were linked to reduced mineral protection offered by short-range-ordered Fe (Fe SRO ). Partial leastsquares path modeling (PLS-PM) further indicated that GRSP could increase microbial necromass and lignin formation by enhancing mineral protection. Our findings have implications for improving the accumulation of refractory and mineral-bound organic matter in coastal wetlands, considering the current scenario of heightened nutrient discharge and sea-level rise.

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Section: Discussionmentioning

confidence: 99%

Microbial Necromass, Lignin, and Glycoproteins for Determining and Optimizing Blue Carbon Formation

Li,

Song,

Xia

et al. 2023

Environ. Sci. Technol.

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Stepwise degradation of organic matters driven by microbial interactions in China΄s coastal wetlands: Evidence from carbon isotope analysis

Yang,

Liu,

Wang

et al. 2024

Water Research

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Metagenomics analysis reveals that carbon degradation rather than carbon fixation is dominant during animal carcass decay

Wang

Sun

et al. 2023

Preprint

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Background Temperature shapes microbial functional genes associated with carbon (C) cycles. However, the effects of temperature on microbial C cycle genes associated with carcass-contaminated water remains poorly understood. To fill this gap, we explored the variation of microbial carbon cycling genes in polluted water caused by animal corpse decay at five different temperature gradients (23, 26, 29, 32, and 35℃) by metagenomic sequencing. Results Corpse decay increased the total carbon by 86.6%, but temperature rise had no significant effect. The dominant phyla of C-cycle microbes were Proteobacteria, followed by Actinobacteria and Bacteroidetes. Approximately a half of carbon-cycling genes and 37.59% of carbohydrate-active enzyme genes can be predicted by temperature, while others were not sensitive to temperature. The alpha diversity of carbon cycling genes decreased with rising temperature, and beta diversity was affected by temperature and cadaver decomposition. High temperature led to an increase of those genes encoding decomposed starch, carbohydrate esters, pectin, lignin, chitin, cellulose, oligosaccharide, debranching enzymes and hemicellulose in control group, while only carbohydrate esters decomposition increased with temperature in the corpse group. The concentration of total carbon was positively related with easily degradable carbon genes (e.g., decomposed starch), but lacked correlations with refractory carbon genes (e.g., cellulose, hemicellulose and lignin). Conclusions We found that carbon degradation rather than carbon fixation was dominated during animal carcass decay, and microbes may prioritize use the degradable carbon, such as easily decomposed amylose. Our research finds that carcass decomposition regulates carbon cycle pathway, and provides possibility for predicting carbon cycle genes under global warming.

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Archaeal contribution to carbon-functional composition and abundance in China’s coastal wetlands: Not to be underestimated

Cited by 3 publications

References 53 publications

Microbial Necromass, Lignin, and Glycoproteins for Determining and Optimizing Blue Carbon Formation

Microbial Necromass, Lignin, and Glycoproteins for Determining and Optimizing Blue Carbon Formation

Stepwise degradation of organic matters driven by microbial interactions in China΄s coastal wetlands: Evidence from carbon isotope analysis

Metagenomics analysis reveals that carbon degradation rather than carbon fixation is dominant during animal carcass decay

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