Carbon sequestration and climate change mitigation using macroalgae: a state of knowledge review

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Год журнала: 2023, Номер 98(6), С. 1945 - 1971

Опубликована: Июль 12, 2023

The conservation, restoration, and improved management of terrestrial forests significantly contributes to mitigate climate change its impacts, as well providing numerous co-benefits. pressing need reduce emissions increase carbon removal from the atmosphere is now also leading development natural solutions in ocean. Interest sequestration potential underwater macroalgal growing rapidly among policy, corporate sectors. Yet, our understanding whether can lead tangible mitigation remains severely limited, hampering their inclusion international policy or finance frameworks. Here, we examine results over 180 publications synthesise evidence regarding forest potential. We show that research efforts on macroalgae are heavily skewed towards particulate organic (POC) pathways (77% data publications), fixation most studied flux (55%). Fluxes directly (e.g. export burial marine sediments) remain poorly resolved, likely hindering regional country-level assessments potential, which only available 17 150 countries where occur. To solve this issue, present a framework categorize coastlines according Finally, review multiple avenues through translate into capacity, largely depends interventions above baseline avoid further emissions. find restoration afforestation potentially order 10's Tg C globally. Although lower than current estimates value all habitats (61-268 year-1 ), it suggests could add total coastal blue ecosystems, offer valuable opportunities polar temperate areas currently low. Operationalizing will necessitate models reliably estimate proportion production sequestered, improvements fingerprinting techniques, rethinking accounting methodologies. ocean provides major adapt change, largest vegetated habitat Earth should not be ignored simply because does fit existing

Язык: Английский

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Carbon export from seaweed forests to deep ocean sinks

Nature Geoscience, Год журнала: 2024, Номер 17(6), С. 552 - 559

Опубликована: Май 22, 2024

Язык: Английский

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Carbon removal and climate change mitigation by seaweed farming: A state of knowledge review

The Science of The Total Environment, Год журнала: 2024, Номер 918, С. 170525 - 170525

Опубликована: Фев. 1, 2024

The pressing need to mitigate the effects of climate change is driving development novel approaches for carbon dioxide removal (CDR) from atmosphere, with ocean playing a central role in portfolio solutions. expansion seaweed farming increasingly considered as one potential CDR avenues among government and private sectors. Yet, comprehensive assessments examining whether can lead tangible mitigation remain limited. Here we examine results over 100 publications synthesize evidence regarding capacity farms review different interventions through which an may contribute mitigation. We find that presently, majority fixed by seaweeds stored short-term reservoirs (e.g., products) only minority ends up long-term are likely fit within existing international accounting frameworks marine sediments). Additionally, tiny global area cultivated date (0.06 % estimated wild extent) limits present mid-term future. A first-order estimate using best available data suggests that, at present, even low emissions scenario, any provided globally be offset their (median balance net emitter: -0.11 Tg C yr

Язык: Английский

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Carbon burial in sediments below seaweed farms matches that of Blue Carbon habitats

Nature Climate Change, Год журнала: 2025, Номер unknown

Опубликована: Янв. 17, 2025

Язык: Английский

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Recalcitrant dissolved organic matter and its major production and removal processes in the ocean

Deep Sea Research Part I Oceanographic Research Papers, Год журнала: 2022, Номер 191, С. 103922 - 103922

Опубликована: Ноя. 6, 2022

Язык: Английский

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Microbial-mediated contribution of kelp detritus to different forms of oceanic carbon sequestration

Ecological Indicators, Год журнала: 2022, Номер 142, С. 109186 - 109186

Опубликована: Июль 21, 2022

Kelp is one of the most important primary producers in coastal oceans. When it matures or begins to decay, a substantial amount detritus sinks and degraded by microorganisms. However, fate these after long-term microbial degradation, which closely related their ultimate carbon sequestration function, not yet clear. Here, studying (210-day) degradation dynamics kelp detritus, we reveal that bioavailable components (when kept dark) persisted for over four months. This left considerable (in total, ca. 8.85%) different forms stable could function sequestration. Among them, recalcitrant dissolved organic (RDOC), particulate carbon, inorganic residual large accounted 1.27%, 0.12%, 6.00%, 0.04%, 1.41% initial detrital respectively. The remaining resisted further due high content humic-like substances, polycyclic aromatics, highly aromatic compounds. Microbial community structure showed obvious successional characteristics during process, driving gradual transformation detritus-derived from labile recalcitrant. Notably, contributed 28.7% RDOC molecular species. study provides novel insights into contribution microbial-mediated

Язык: Английский

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Legacy Effects of Late Macroalgal Blooms on Dissolved Inorganic Carbon Pool through Alkalinity Enhancement in Coastal Ocean

Environmental Science & Technology, Год журнала: 2023, Номер 57(5), С. 2186 - 2196

Опубликована: Янв. 24, 2023

Taking the world's largest green tide caused by macroalga Ulva prolifera in South Yellow Sea as a natural case, it is studied here if macroalgae can perform inorganic carbon sequestration ocean. Massive released large amounts of organic carbon, most which were transformed microorganisms into dissolved (DIC). Nearshore field investigations showed that, along with seawater deoxygenation and acidification, both DIC total alkalinity (TAlk) increased significantly (both >50%) areas covered dense U. at late-bloom stage. Offshore mapping cruises revealed that TAlk relatively higher stage than before-bloom Laboratory cultivation further manifested significant enhancement effect on seawater. Sulfate reduction and/or denitrification likely dominated production TAlk. Notably, half generated almost all could persist under varying conditions, from hypoxia to normoxia air–water CO2 disequilibrium re-equilibrium. The allowed more remain rather escape atmosphere, thus having long-term legacy increasing pool

Язык: Английский

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A systematic overview, trends and global perspectives on blue carbon: A bibliometric study (2003–2021)

Ecological Indicators, Год журнала: 2023, Номер 148, С. 110063 - 110063

Опубликована: Фев. 28, 2023

Blue carbon sequestration is a nature-based solution to environmental problems caused by climate change and has significant positive impact on the planet human well-being. This paper bibliometrically systematically analyzed 2,613 studies found in Web of Science Core Collection (WoSCC) from 2003 2021 explore hotspots trends blue research using Bibliometrix package R studio VOSviewer software. The results based network co-occurrence analysis indicated that mangroves, seagrasses, salt marshes were major ecosystems (BCEs), mangrove sinks most popular central area. Furthermore, phytoplankton microalgae have essential roles marine cycle bioenergy utilization, as revealed high proportion published literature, while transport mechanisms seagrass macroalgae was understudied. Thematic evolution remote sensing commonly used technology an emerging field for ecological monitoring investigation recent years. In addition, increasing artificial approaches, fishery sinks, been potential development. findings this study shed light past eighteen years, current points field, areas need more investment going forward.

Язык: Английский

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Prediction and assessment of marine fisheries carbon sink in China based on a novel nonlinear grey Bernoulli model with multiple optimizations

The Science of The Total Environment, Год журнала: 2024, Номер 914, С. 169769 - 169769

Опубликована: Янв. 3, 2024

Язык: Английский

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Adverse Environmental Perturbations May Threaten Kelp Farming Sustainability by Exacerbating Enterobacterales Diseases

Environmental Science & Technology, Год журнала: 2024, Номер 58(13), С. 5796 - 5810

Опубликована: Март 20, 2024

Globally kelp farming is gaining attention to mitigate land-use pressures and achieve carbon neutrality. However, the influence of environmental perturbations on remains largely unknown. Recently, a severe disease outbreak caused extensive mortality in Sanggou Bay, China, one world's largest high-density areas. Here, through situ investigations simulation experiments, we find indications that an anomalously dramatic increase elevated coastal seawater light penetration may have contributed dysbiosis Saccharina japonica's microbiome. This promoted proliferation opportunistic pathogenic Enterobacterales, mainly including genera Colwellia Pseudoalteromonas. Using transcriptomic analyses, revealed high-light conditions likely induced oxidative stress kelp, potentially facilitating bacterial Enterobacterales attack activates terrestrial plant-like pattern recognition receptor system kelp. Furthermore, uncover crucial genotypic determinants dominance pathogenicity within tissue, pathogen-associated molecular patterns, potential membrane-damaging toxins, alginate mannitol lysis capability. Finally, analysis kelp-associated microbiome data sets under ocean warming acidification, conclude such favoring shifts are become more prevalent future conditions. Our study highlights need for understanding complex influences health associated microbiomes sustainable development seaweed farming.

Язык: Английский

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