Increase in sedimentary organic carbon with a change from hypoxic to oxic conditions

Mahmood, Mukseet; Taki, Shunsuke; Nakai, Satoshi; Gotoh, Takehiko; Nishijima, Wataru; Umehara, Akira; Aoyagi, Tomo; Sato, Yuya; Hori, Tomoyuki; Katayama, Yoko; Hajdu-Rahkama, Réka; Puhakka, Jaakko A.

doi:10.1016/j.marpolbul.2021.112397

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…Thus, the deposited sediments most likely harbored the coastal microbial communities. The sulfur-oxidizing Sulfurimonas and Chromatiales bacteria play an important role in the nitrogen, sulfur, and carbon cycling in coastal environments. − , In particular, the genus Sulfurimonas was often found to be dominant in highly sulfidic sediments and hydrothermal environments. , In this study, the Sulfurimonas sp. HDS01 relative became metabolically more active than the other microorganisms, suggesting its ecological preferences for substrate, e.g., different reduced sulfur compounds.…”

Section: Discussionmentioning

confidence: 76%

“…The sulfuroxidizing Sulf urimonas and Chromatiales bacteria play an important role in the nitrogen, sulfur, and carbon cycling in coastal environments. [25][26][27][28]61 In particular, the genus Sulf urimonas was often found to be dominant in highly sulfidic sediments and hydrothermal environments. 62,63 In this study, the Sulf urimonas sp.…”

Section: ■ Discussionmentioning

confidence: 99%

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Nitrate-Driven Trophic Association of Sulfur-Cycling Microorganisms in Tsunami-Deposited Marine Sediment Revealed by High-Sensitivity ¹³C-Bicarbonate Probing

Aoyagi

Katayama

Aizawa

et al. 2021

Environ. Sci. Technol.

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Although denitrification-dependent chemolithotrophic sulfur oxidizers proliferated in tsunami-deposited marine sediment with nitrate amendment, their ecophysiological roles in biogeochemical carbon transfer are not addressed. We employed time-resolved high-sensitivity 13C-bicarbonate probing of rRNA to unveil the carbon fixation and resulting trophic relationship of the nitrate-amended sediment microorganisms. Nitrate reduction and sulfur oxidation co-occurred along with significant decreases in the 13CO2 and dissolved bicarbonate concentrations for the first 4 days of the incubation, during which the denitrification-dependent sulfur-oxidizing chemolithotrophs, i.e., the Sulfurimonas sp. HDS01 and Thioalkalispira sp. HDS22 relatives, and the sulfate-reducing heterotrophs, i.e., the Desulfobulbus spp. and Desulfofustis glycolicus relatives, actively incorporated 13C. These indicated that the sulfur oxidizers and sulfate reducers were tightly associated with each other through the direct carbon transfer. Relatives of the fermentative Thalassomonas sediminis and the hydrolytic Pararheinheimera aquatica, in addition to various sulfur-cycling microorganisms, significantly assimilated 13C at day 14. Although the incorporation of 13C was not detected, a syntrophic volatile-fatty-acid oxidizer and hydrogenotrophic methanogens significantly expressed their 16S rRNA molecules at day 21, indicating the metabolic activation of these final decomposers under the latter nutrient-limited conditions. The results demonstrated the nitrate-driven trophic association of sulfur-cycling microorganisms and the subsequent microbial activation and diversification, triggering the restoration of the marine ecosystem function.

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Section: Discussionmentioning

confidence: 76%

Section: ■ Discussionmentioning

confidence: 99%

Nitrate-Driven Trophic Association of Sulfur-Cycling Microorganisms in Tsunami-Deposited Marine Sediment Revealed by High-Sensitivity ¹³C-Bicarbonate Probing

Aoyagi

Katayama

Aizawa

et al. 2021

Environ. Sci. Technol.

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Controlling organic carbon increase in oxygenated marine sediment by using decarburization slag

Mahmood,

Kato,

Nakai

et al. 2024

Journal of Environmental Management

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Succession and environmental response of sediment bacterial communities in the Liao River Estuary at the centenary scale

Guo

Shao

et al. 2023

Marine Environmental Research

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Increase in sedimentary organic carbon with a change from hypoxic to oxic conditions

Cited by 3 publications

References 31 publications

Nitrate-Driven Trophic Association of Sulfur-Cycling Microorganisms in Tsunami-Deposited Marine Sediment Revealed by High-Sensitivity ¹³C-Bicarbonate Probing

Nitrate-Driven Trophic Association of Sulfur-Cycling Microorganisms in Tsunami-Deposited Marine Sediment Revealed by High-Sensitivity ¹³C-Bicarbonate Probing

Controlling organic carbon increase in oxygenated marine sediment by using decarburization slag

Succession and environmental response of sediment bacterial communities in the Liao River Estuary at the centenary scale

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Increase in sedimentary organic carbon with a change from hypoxic to oxic conditions

Cited by 3 publications

References 31 publications

Nitrate-Driven Trophic Association of Sulfur-Cycling Microorganisms in Tsunami-Deposited Marine Sediment Revealed by High-Sensitivity 13C-Bicarbonate Probing

Nitrate-Driven Trophic Association of Sulfur-Cycling Microorganisms in Tsunami-Deposited Marine Sediment Revealed by High-Sensitivity 13C-Bicarbonate Probing

Controlling organic carbon increase in oxygenated marine sediment by using decarburization slag

Succession and environmental response of sediment bacterial communities in the Liao River Estuary at the centenary scale

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Nitrate-Driven Trophic Association of Sulfur-Cycling Microorganisms in Tsunami-Deposited Marine Sediment Revealed by High-Sensitivity ¹³C-Bicarbonate Probing

Nitrate-Driven Trophic Association of Sulfur-Cycling Microorganisms in Tsunami-Deposited Marine Sediment Revealed by High-Sensitivity ¹³C-Bicarbonate Probing