The Hunt for Chemical Dark Matter across a River-to-Ocean Continuum DOI
Ruanhong Cai,

Piao Yao,

Yuanbi Yi

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(27), P. 11988 - 11997

Published: June 14, 2024

Thousands of mass peaks emerge during molecular characterization natural dissolved organic matter (DOM) using ultrahigh-resolution spectrometry. While assigned to certain formulas have been extensively studied, the uncharacterized that represent a significant fraction and convey biogenic elements energy previously ignored. In this study, we introduce term dark DOM (DDOM) for unassigned explored its characteristics environmental behaviors data set 38 extracts covering Yangtze River-to-ocean continuum. We identified total 9141 DDOM molecules, which exhibited higher weight greater diversity than subset with formulas. Although contributed smaller relative abundance, it significantly impacted composition bulk DOM. A portion was found increase abundance across river-to-ocean These compounds could contain halogenated molecules might high potential contribute refractory carbon pool. With underline contribution pool emphasize more research is needed understand global biogeochemical cycles sequestration.

Language: Английский

Carbon sequestration and climate change mitigation using macroalgae: a state of knowledge review DOI Creative Commons
Albert Pessarrodona, Rita Melo Franco-Santos, Luka Seamus Wright

et al.

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2023, Volume and Issue: 98(6), P. 1945 - 1971

Published: July 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

Language: Английский

Citations

64
Carbon export from seaweed forests to deep ocean sinks DOI
Karen Filbee‐Dexter, Albert Pessarrodona, Morten Foldager Pedersen

et al.

Nature Geoscience, Journal Year: 2024, Volume and Issue: 17(6), P. 552 - 559

Published: May 22, 2024

Language: Английский

Citations

25
Carbon removal and climate change mitigation by seaweed farming: A state of knowledge review DOI Creative Commons
Albert Pessarrodona, Jennifer Howard,

Emily Pidgeon

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 918, P. 170525 - 170525

Published: Feb. 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

Language: Английский

Citations

24
Carbon burial in sediments below seaweed farms matches that of Blue Carbon habitats DOI
Carlos M. Duarte, Antonio Delgado‐Huertas, Elisa Martí

et al.

Nature Climate Change, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

Language: Английский

Citations

2
Dissolved Organic Carbon Estimation in Lakes: Improving Machine Learning with Data Augmentation on Fusion of Multi-Sensor Remote Sensing Observations DOI

Seyed Babak Haji Seyed Asadollah,

Ahmadreza Safaeinia,

Sina Jarahizadeh

et al.

Water Research, Journal Year: 2025, Volume and Issue: 277, P. 123350 - 123350

Published: Feb. 22, 2025

Language: Английский

Citations

2
Recalcitrant dissolved organic matter and its major production and removal processes in the ocean DOI Open Access
Ruanhong Cai, Nianzhi Jiao

Deep Sea Research Part I Oceanographic Research Papers, Journal Year: 2022, Volume and Issue: 191, P. 103922 - 103922

Published: Nov. 6, 2022

Language: Английский

Citations

53
Microbial-mediated contribution of kelp detritus to different forms of oceanic carbon sequestration DOI Creative Commons

Xiuting Feng,

Hongmei Li, Zenghu Zhang

et al.

Ecological Indicators, Journal Year: 2022, Volume and Issue: 142, P. 109186 - 109186

Published: July 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

Language: Английский

Citations

46
Legacy Effects of Late Macroalgal Blooms on Dissolved Inorganic Carbon Pool through Alkalinity Enhancement in Coastal Ocean DOI
Tianqi Xiong, Hongmei Li, Yufei Yue

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(5), P. 2186 - 2196

Published: Jan. 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

Language: Английский

Citations

26
Prediction and assessment of marine fisheries carbon sink in China based on a novel nonlinear grey Bernoulli model with multiple optimizations DOI
Xuemei Li, Jin Yang, Yufeng Zhao

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 914, P. 169769 - 169769

Published: Jan. 3, 2024

Language: Английский

Citations

10
Molecular-level insights into dissolved organic matter and its variations of the full-scale processes in a typical petrochemical wastewater treatment plant DOI
Min Li, Zhouyang Li,

Liya Fu

et al.

Water Research, Journal Year: 2024, Volume and Issue: 261, P. 121990 - 121990

Published: June 25, 2024

Language: Английский

Citations

9