Carbon sequestration from refractory dissolved organic carbon produced by biodegradation of Saccharina japonica

Zhang, Mingliang; Qin, Huawei; Ma, Yuanqing; Qi, Yuhan; Zhao, Yuting; Wang, Zhidong; Li, Bin

doi:10.1016/j.marenvres.2022.105803

Cited by 14 publications

(5 citation statements)

References 58 publications

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“…Meanwhile, Sul tobacter and Roseobacter belonging to Alphaproteobacteria were revealed as the dominant species during the rapid DOC degradation period in the present study. A large amount of sulfur-containing organic compounds present in the DOC released from the macroalgae collectively entered the water column (Zhang et al 2023). The sulfate-reducing bacteria, such as Sul tobacter, are the main degraders of organic sulfur.…”

Section: Discussionmentioning

confidence: 99%

“…The DOC produced by the macroalgae and shell sh aquaculture is consumed by microorganisms and used for survival, ultimately generating RDOC. A recent study revealed that macroalgal biodegradation also leads to RDOC production (Zhang et al 2023) and, therefore, indirect production of RDOC by macroalgae and shell sh cannot be ignored in the marine carbon cycle ).…”

Section: Introductionmentioning

confidence: 99%

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Microbial degradation of DOC released by the mixed culture of Crassostrea gigas and Undaria pinnatifida

Hu,

Su,

Shao

et al. 2024

Preprint

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To determine the potential of shellfish-algae aquaculture on carbon sequestration, we studied the microbial degradation process of dissolved organic carbon (DOC) released in a mixed culture of Crassostrea gigas and Undaria pinnatifida. The results showed that DOC concentration tended to rapidly decline followed by a slow decline period and then a steady phase with 28% concentration of DOC remaining over a period of 120 days after removing the Crassostrea gigas and Undaria pinnatifida. Bacterial community structure was dynamic over time and changed in response to three stages of DOC degradation. In the three stages of DOC degradation, the dominant microbial classes shifted from Alphaproteobacteria (39%) and Gammaproteobacteria (43%) in the rapid decline period to Planctomycetia (28%) and Flavobacteria (19%) in the slow decline period to Alphaproteobacteria (29%) in the stable period. The amino acid metabolism and carbohydrate metabolism were observed to be highly active in the rapid DOC decline and slow DOC decline periods, respectively. The carbon-fixing genes smtA and rbcL were most abundant during the DOC rapid degradation stage. The DOC concentration was significantly negatively correlated with Planctomycetia, Anaerolineae (p < 0.05) and the tricarboxylic acid cycle (TCA cycle) (p < 0.001). These results suggested that the main carbon fixation pathways TCA cycle and its related carbon-fixing genes may be involved in the degradation of DOC released by the mixed culture of shellfish-algae.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microbial degradation of DOC released by the mixed culture of Crassostrea gigas and Undaria pinnatifida

Hu,

Su,

Shao

et al. 2024

Preprint

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“…The sediment OC resuspension time in the water column in coastal systems depends on particle size and water turbulence, and it is usually limited to few days (< 30 days; Lande and Wood, 1987;Omand et al, 2020). That explains that most of the previous studies about sediment OC remineralization from marine ecosystems under oxic conditions were limited to short-term experimental periods (i.e., few weeks or months; Zhao et al, 2018;Zhang et al, 2023). However, shallow waters are systems in which interactions between sediment and water column are continuous (Fabiano et al, 2000), and where the carbon cycle is coupled closely with the water column through a succession of erosion/redeposition cycles as a consequence of higher (both, in number and intensity) turbulence events, such as storms (Pusceddu et al, 2005;Arndt et al, 2013), which may increase the resuspension time of sediments, and therefore the time OC is subjected to oxic remineralization conditions in the water column.…”

Section: Introductionmentioning

confidence: 99%

“…During the remineralization of OC, dissolved organic materials (DOM) such as dissolved organic carbon and nitrogen (DOC and DON) are produced (Zhang et al, 2023). To date, the few recent studies analysing the OC resuspension and remineralization in vegetated coastal communities has been limited to particulate fraction (POC; Marin-Diaz et al, 2020;Barcelona et al, 2021), meanwhile the dissolved organic fraction (DOC) remains largely unexplored.…”

Section: Introductionmentioning

confidence: 99%

“…A significant fraction of this DOC is formed by bioavailable material (i.e., the labile fraction; DOC L ) being an important driver of secondary production, acting as a quick transfer of carbon across the food web (Egea et al, 2019;Moran et al, 2022). Otherwise, another fraction of this DOC is apparently non-accessible to rapid microbial degradation (i.e., recalcitrant fraction; DOC R ) and it can be exported and sequestered in the deep ocean, and therefore it is considered nowadays a cornerstone in the contribution of oceans to carbon sequestration (Krause-Jensen and Jimeńez-Ramos et al, 2022;Zhang et al, 2023;Egea et al, 2023b). On the other hand, seagrass and macroalgae are highly variable in terms of size, biomass, and meadow canopy complexity, which ultimately affect the properties of sediment deposits -main OM origin (autochthonous vs allochthonous), dry bulk density (DBD), OC and CaCO 3 contents, etc (Mazarrasa et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Long-term sediment organic carbon remineralization in different seagrass and macroalgae habitats: implication for blue carbon storage

Yamuza-Magdaleno,

Jiménez-Ramos,

Casal-Porras

et al. 2024

Front. Mar. Sci.

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Seagrass and macroalgae beds are key blue carbon ecosystems in the ocean. However, coastal development and climate change are sparking a growing concern about the vulnerability of sediment organic carbon (OC) to remineralization after macrophyte perturbation. Thus, the aim of this study was to assess the potential of long-term remineralization of sediment OC stocks (1 year) in coastal vegetated habitats (i.e., seagrasses Zostera noltei and Cymodocea nodosa, macroalgae Caulerpa prolifera and unvegetated sediment) after complete disturbance of macrophyte meadows under conducive conditions to microorganisms growth (i.e., oxygen saturated, non-nutrient limitation, turbulence and dark). Leached dissolved organic carbon (DOC) from particulate organic carbon (POC) remineralization, carbonate dissolution and photo-reactivity of long-term persistent DOC were also evaluated. Our results evidenced that, sediment OC from Z. noltei and unvegetated habitats were entirely remineralized to CO2. However, sediment OC from C. nodosa and C. prolifera communities exhibited a significant fraction of recalcitrant OC, and therefore, a 42 and 46% of the sediment OC still remained after 1 year of culture, respectively. POC remineralization released relevant amounts of both labile and recalcitrant DOC, which showed low photo-reactivity. Finally, we discuss that the main argument to promote management, monitoring, and restoration programs for macrophytes is usually based on their sediment OC deposit, which favor larger species. The study presented here adds arguments to also include small macrophyte species, since their sediment OC may be highly labile and entirely remineralized to CO2 once these habitats are disturbed.

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Soil bacteria mediate organic carbon stability during alpine wetland biogeomorphic succession in the arid region of Central Asia

Hu,

Cong,

Chen

et al. 2023

Plant Soil

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Carbon sequestration from refractory dissolved organic carbon produced by biodegradation of Saccharina japonica

Cited by 14 publications

References 58 publications

Microbial degradation of DOC released by the mixed culture of Crassostrea gigas and Undaria pinnatifida

Microbial degradation of DOC released by the mixed culture of Crassostrea gigas and Undaria pinnatifida

Long-term sediment organic carbon remineralization in different seagrass and macroalgae habitats: implication for blue carbon storage

Soil bacteria mediate organic carbon stability during alpine wetland biogeomorphic succession in the arid region of Central Asia

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