Eco-engineering approaches for ocean negative carbon emission

Zhang, Chuanlun; Shi, Tao; Liu, Jihua; He, Zhili; Thomas, Helmuth; Dong, Hailiang; Rinkevich, B.; Wang, Yuze; Hyun, Jung‐Ho; Weinbauer, Markus G.; Abbate, M. Celeste López; Tu, Qichao; Xie, Shucheng; Yamashita, Youhei; Tishchenko, P. Ya.; Chen, Quanrui; Zhang, Rui; Jiao, Nianzhi

doi:10.1016/j.scib.2022.11.016

Cited by 32 publications

(11 citation statements)

References 85 publications

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“…Second, microorganisms transform plant-derived C to build the biomass via anabolism and subsequently promote the formation of RDOC and microbial necromass, which is considered as the primary source of stable soil organic C (Liang et al, 2017;Ni et al, 2021). The production of RDOC is largely attributed to microbial activities and is related to the secondary metabolites released by diverse microorganisms (Jiao et al, 2010;Zhang et al, 2018Zhang et al, , 2022. Thus, the transformation of plant-derived C to microbial biomass may enhance the RDOC production in coastal ecosystems, while unravelling its composition and related microbial populations is still a challenge.…”

Section: Discussionmentioning

confidence: 99%

“…In addition to C fixation, there are several functional pathways and associated microbial groups also involved in C sink formation and transformation, such as anaerobic methane oxidation and organic carbon degradation (Caesar et al, 2019; Pätsch et al, 2018; Yang et al, 2020; Yu et al, 2023). For example, anaerobic methanotrophic archaea could produce acetate from methane and fuels the heterotrophic community, which is found to dominate the RDOC formation (He, Xiao, et al, 2022; Yang et al, 2020); they could also accelerate carbonate precipitation and increase the alkalinity, which is related to the enhancement of C sink (Caesar et al, 2019; Zhang et al, 2022). Anaerobic degradation of organic carbon (e.g.…”

Section: Discussionmentioning

confidence: 99%

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Chemoautotrophic sulphur oxidizers dominate microbial necromass carbon formation in coastal blue carbon ecosystems

Yu,

Qian,

et al. 2023

Functional Ecology

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Coastal blue carbon (C) ecosystems are recognized as efficient natural C sinks and play key roles in mitigating global climate change. Microbially driven C, nitrogen (N) and sulphur (S) cycles are crucial for ecosystem functioning, but how microorganisms drive C sink formation and C sequestration in coastal sediments remains unclear. In this study, we conducted a comprehensive analysis of amino sugars, C, N and S cycling genes/pathways and their associated taxa in coastal sediments of native (Cyperus malaccensis and Kandelia obovata) and alien (Spartina alterniflora and Sonneratia apetala) vegetation. Compared to the alien‐vegetated coastal sediment, the native‐vegetated coastal sediment had significantly (p < 0.05) higher microbial necromass C and higher functional potentials of chemoautotrophic C fixation, C degradation, methane cycling, N2 fixation, S oxidation and sulphate reduction. Also, our analysis of coastal sediment microbiomes showed that S oxidation could be coupled with C fixation and/or nitrate/nitrite reduction. S oxidation, C degradation and C fixation were found to be key functional pathways for predicting sediment microbial necromass C. Additionally, the sulphur‐oxidizing Burkholderiales metagenome‐assembled genomes (MAGs) were a key functional group that dominated chemoautotrophic C fixation in coastal sediments. These results suggested that chemoautotrophic S oxidizers, in particular Burkholderiales with a novel lineage, might be the key microbial group that dominates microbial necromass C formation in coastal sediments through microbial anabolism (C fixation);the coupling of microbially driven C, N and S cycling processes; and the deposition of microbially derived C. This study provides novel insights into the importance of chemoautotrophic S oxidizers for microbial necromass formation and shed new light on the microbial mechanism of C sink formation in coastal ecosystems, which also has important implications for enhancing C sequestration in coastal wetlands. Read the free Plain Language Summary for this article on the Journal blog.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Chemoautotrophic sulphur oxidizers dominate microbial necromass carbon formation in coastal blue carbon ecosystems

Yu,

Qian,

et al. 2023

Functional Ecology

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“…carbon into the deep ocean for permanent storage. 87,88 Research on this technique, however, is largely lacking and is currently almost purely conceptual.…”

Section: Ocean-based Netsmentioning

confidence: 99%

“…Artificial downwelling attempts to accelerate this natural process by pumping surface ocean waters that are rich in sequestered carbon into the deep ocean for permanent storage. 87,88 Research on this technique, however, is largely lacking and is currently almost purely conceptual.…”

Section: Ocean-based Options To Supplement Climate Change Mitigationmentioning

confidence: 99%

Direct ocean capture: the emergence of electrochemical processes for oceanic carbon removal

Aleta,

Refaie,

Afshari

et al. 2023

Energy Environ. Sci.

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“…Carbon neutrality is a significant and urgent development topic and strategy for all humans due to the increasingly serious environmental crises induced by growing atmospheric CO 2 concentrations, 1 such as global warming and ocean acidification. As photosynthetic microorganisms, microalgae have been considered great candidates for capturing and fixing CO 2 due to their rapid growth rate, high photosynthetic efficiency, and CO 2 fixation rate.…”

Section: Introductionmentioning

confidence: 99%

Novel Thin-Layer Fountain Photobioreactors for the High-Density Cultivation of Spirulina sp

Wang,

Hu,

et al. 2023

ACS Sustainable Chem. Eng.

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Microalgae have been considered great candidates for carbon reduction and sustainable feedstock for foods, biofuels, and biochemicals, but their production usually features low productivity, high costs, and intensive energy inputs. The thick culture layer adopted in conventional cultivation systems (5.0−30 cm) has been established as a significant reason for the above problems. In this study, a novel mixing-based thin-layer fountain photobioreactor (TLF-PBR) was developed. A fountain pump was used to pump and spray microalgal culture for mixing. The results showed that the mixing mode could support sufficient mixing to efficiently cultivate Spirulina sp. in a 50 cm-diameter TLF-PBR, with the lowest mixing time of 13.580 ± 0.522 s, the highest oxygen mass transfer coefficient of 142.555 ± 5.791 h −1 , and the highest biomass concentration of 3.118 ± 0.009 g L −1 in the 1.0 cm layer. The TLF-PBR was successfully scaled to a diameter of 1.5 m (1.766 m 2 ), with a maximum biomass density of 3.955 ± 0.037 g L −1 , which was 71.0 and 44.7% higher than that of the flat panel PBR and thin-layer cascade system, respectively. This study provides a novel approach for developing thin-layer, scalable PBRs that could support cost-effective, efficient microalgae production.

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Eco-engineering approaches for ocean negative carbon emission

Cited by 32 publications

References 85 publications

Chemoautotrophic sulphur oxidizers dominate microbial necromass carbon formation in coastal blue carbon ecosystems

Chemoautotrophic sulphur oxidizers dominate microbial necromass carbon formation in coastal blue carbon ecosystems

Direct ocean capture: the emergence of electrochemical processes for oceanic carbon removal

Novel Thin-Layer Fountain Photobioreactors for the High-Density Cultivation of Spirulina sp

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