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Global dispersal of macroalgae-derived recalcitrant DOC may substantially contribute to deep-ocean carbon storage.

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Τίτλος: Global dispersal of macroalgae-derived recalcitrant DOC may substantially contribute to deep-ocean carbon storage.
Συγγραφείς: Feng X; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.; University of Chinese Academy of Sciences, Beijing, China., Nair S; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China., Hancke K; Norwegian Institute for Water Research, Oslo, Norway., Lønborg C; Section for Marine Diversity and Experimental Ecology, Department of Ecoscience, Aarhus University, Roskilde, Denmark., Li H; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.; University of Chinese Academy of Sciences, Beijing, China., Zhang Z; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.; University of Chinese Academy of Sciences, Beijing, China., Zheng Q; Institute of Marine Microbes and Ecospheres, Xiamen University, Xiamen, China., He C; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing, China., Shi Q; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing, China., Li X; The State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China., Bellerby R; Norwegian Institute for Water Research, Bergen, Norway., Jiao N; Institute of Marine Microbes and Ecospheres, Xiamen University, Xiamen, China., Zhang Y; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.; University of Chinese Academy of Sciences, Beijing, China.
Πηγή: Science advances [Sci Adv] 2026 Sep 25; Vol. 12 (39), pp. eaeg3815. Date of Electronic Publication: 2026 Sep 23.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: American Association for the Advancement of Science Country of Publication: United States NLM ID: 101653440 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2375-2548 (Electronic) Linking ISSN: 23752548 NLM ISO Abbreviation: Sci Adv Subsets: MEDLINE
Imprint Name(s): Original Publication: Washington, DC : American Association for the Advancement of Science, [2015]-
Ιατρικοί όροι (MeSH): Seaweed*/metabolism , Seaweed*/chemistry , Carbon*/metabolism , Carbon*/chemistry , Dissolved Organic Matter*/analysis , Dissolved Organic Matter*/chemistry , Oceans and Seas* , Carbon Sequestration*, Kelp/metabolism ; Ecosystem
Περίληψη: Macroalgae, the dominant primary producers of Earth's most productive coastal vegetated ecosystems and a vital component driving ocean carbon sequestration, produce ∼5 to 80% of their net primary productivity as dissolved organic carbon (DOC). However, the global extent, fate, and contribution of this macroalgae-derived DOC to the pelagic carbon pool remain poorly understood. We establish a molecular fingerprint of the dominant coastal macroalga Saccharina japonica-derived DOC (kelp-derived DOC) using ultrahigh-resolution mass spectrometry and conservative filtering. We differentiate the kelp-derived DOC into labile (LDOC) and recalcitrant fractions (RDOC) based on prolonged resistance to microbial degradation, identify discriminating molecular traits through machine learning, and integrate them into a stability metric, molecular recalcitrance score (MRS). Both candidate kelp-associated RDOC signals and the more persistent, semilabile subset of candidate kelp-associated LDOC signals are detected throughout the global ocean, as far as ∼10,000 kilometers from kelp ecosystems and at depths of ∼5500 meters. Detected candidate kelp-associated DOC signals exhibit elevated MRS, with values positively correlated with distance from source regions, indicating selective long-distance transport of intrinsically more stable compounds. We preliminarily estimate that coastal macroalgal ecosystems globally may contribute 320.7 to 481.1 teragrams of carbon per year of RDOC. The detection of candidate kelp-associated RDOC signals throughout the global ocean provides molecular-level evidence of the long-distance export of macroalgae-derived RDOC to the pelagic and deep ocean, highlighting a major, previously unrecognized pathway of long-term storage of macroalgae-derived DOC in global oceans, although the precise fraction exported to the deep ocean remains to be quantified.
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Oecologia. 2020 Jan;192(1):227-239. (PMID: 31834515)
Sci Adv. 2025 Jul 11;11(28):eadw1148. (PMID: 40644537)
Environ Sci Technol. 2024 Jul 9;58(27):11988-11997. (PMID: 38875444)
Sci Adv. 2022 Apr 22;8(16):eabj8394. (PMID: 35442733)
Sci Total Environ. 2023 Dec 15;904:166843. (PMID: 37678524)
ACS Environ Au. 2023 Dec 06;4(1):31-41. (PMID: 38250340)
Ann Rev Mar Sci. 2013;5:421-45. (PMID: 22881353)
Glob Chang Biol. 2024 Nov;30(11):e17570. (PMID: 39600212)
Environ Sci Technol. 2023 Dec 5;57(48):19723-19731. (PMID: 37963337)
Sci Adv. 2022 Sep 16;8(37):eabn2465. (PMID: 36103524)
Environ Sci Technol. 2025 Aug 19;59(32):16985-16996. (PMID: 40675776)
Environ Sci Technol. 2009 Feb 1;43(3):698-703. (PMID: 19245004)
Sci Adv. 2022 Jul 8;8(27):eabn0035. (PMID: 35857452)
Curr Biol. 2019 Sep 23;29(18):3087-3093.e3. (PMID: 31474532)
Water Res. 2020 Oct 15;185:116268. (PMID: 32784034)
ACS Omega. 2020 May 14;5(20):11730-11736. (PMID: 32478264)
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Substance Nomenclature: 7440-44-0 (Carbon)
0 (Dissolved Organic Matter)
Entry Date(s): Date Created: 20260923 Date Completed: 20260923 Latest Revision: 20260925
Update Code: 20260925
PubMed Central ID: PMC13600246
DOI: 10.1126/sciadv.aeg3815
PMID: 42777052
Βάση Δεδομένων: MEDLINE
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  Data: Global dispersal of macroalgae-derived recalcitrant DOC may substantially contribute to deep-ocean carbon storage.
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  Data: <searchLink fieldCode="AU" term="%22Feng+X%22">Feng X</searchLink>; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.; University of Chinese Academy of Sciences, Beijing, China.<br /><searchLink fieldCode="AU" term="%22Nair+S%22">Nair S</searchLink>; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.<br /><searchLink fieldCode="AU" term="%22Hancke+K%22">Hancke K</searchLink>; Norwegian Institute for Water Research, Oslo, Norway.<br /><searchLink fieldCode="AU" term="%22Lønborg+C%22">Lønborg C</searchLink>; Section for Marine Diversity and Experimental Ecology, Department of Ecoscience, Aarhus University, Roskilde, Denmark.<br /><searchLink fieldCode="AU" term="%22Li+H%22">Li H</searchLink>; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.; University of Chinese Academy of Sciences, Beijing, China.<br /><searchLink fieldCode="AU" term="%22Zhang+Z%22">Zhang Z</searchLink>; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.; University of Chinese Academy of Sciences, Beijing, China.<br /><searchLink fieldCode="AU" term="%22Zheng+Q%22">Zheng Q</searchLink>; Institute of Marine Microbes and Ecospheres, Xiamen University, Xiamen, China.<br /><searchLink fieldCode="AU" term="%22He+C%22">He C</searchLink>; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing, China.<br /><searchLink fieldCode="AU" term="%22Shi+Q%22">Shi Q</searchLink>; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing, China.<br /><searchLink fieldCode="AU" term="%22Li+X%22">Li X</searchLink>; The State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China.<br /><searchLink fieldCode="AU" term="%22Bellerby+R%22">Bellerby R</searchLink>; Norwegian Institute for Water Research, Bergen, Norway.<br /><searchLink fieldCode="AU" term="%22Jiao+N%22">Jiao N</searchLink>; Institute of Marine Microbes and Ecospheres, Xiamen University, Xiamen, China.<br /><searchLink fieldCode="AU" term="%22Zhang+Y%22">Zhang Y</searchLink>; State Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy, Qingdao New Energy Shandong Laboratory, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China.; University of Chinese Academy of Sciences, Beijing, China.
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  Data: <searchLink fieldCode="JN" term="%22101653440%22">Science advances</searchLink> [Sci Adv] 2026 Sep 25; Vol. 12 (39), pp. eaeg3815. <i>Date of Electronic Publication: </i>2026 Sep 23.
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  Data: Macroalgae, the dominant primary producers of Earth's most productive coastal vegetated ecosystems and a vital component driving ocean carbon sequestration, produce ∼5 to 80% of their net primary productivity as dissolved organic carbon (DOC). However, the global extent, fate, and contribution of this macroalgae-derived DOC to the pelagic carbon pool remain poorly understood. We establish a molecular fingerprint of the dominant coastal macroalga Saccharina japonica-derived DOC (kelp-derived DOC) using ultrahigh-resolution mass spectrometry and conservative filtering. We differentiate the kelp-derived DOC into labile (LDOC) and recalcitrant fractions (RDOC) based on prolonged resistance to microbial degradation, identify discriminating molecular traits through machine learning, and integrate them into a stability metric, molecular recalcitrance score (MRS). Both candidate kelp-associated RDOC signals and the more persistent, semilabile subset of candidate kelp-associated LDOC signals are detected throughout the global ocean, as far as ∼10,000 kilometers from kelp ecosystems and at depths of ∼5500 meters. Detected candidate kelp-associated DOC signals exhibit elevated MRS, with values positively correlated with distance from source regions, indicating selective long-distance transport of intrinsically more stable compounds. We preliminarily estimate that coastal macroalgal ecosystems globally may contribute 320.7 to 481.1 teragrams of carbon per year of RDOC. The detection of candidate kelp-associated RDOC signals throughout the global ocean provides molecular-level evidence of the long-distance export of macroalgae-derived RDOC to the pelagic and deep ocean, highlighting a major, previously unrecognized pathway of long-term storage of macroalgae-derived DOC in global oceans, although the precise fraction exported to the deep ocean remains to be quantified.
– Name: Ref
  Label: References
  Group: RefInfo
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  Group: ID
  Data: PMC13600246
– Name: DOI
  Label: DOI
  Group: ID
  Data: 10.1126/sciadv.aeg3815
– Name: AN
  Label: PMID
  Group: ID
  Data: 42777052
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=cmedm&AN=42777052
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1126/sciadv.aeg3815
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        StartPage: eaeg3815
    Subjects:
      – SubjectFull: Kelp metabolism
        Type: general
      – SubjectFull: Ecosystem
        Type: general
      – SubjectFull: Seaweed metabolism
        Type: general
      – SubjectFull: Seaweed chemistry
        Type: general
      – SubjectFull: Carbon metabolism
        Type: general
      – SubjectFull: Carbon chemistry
        Type: general
      – SubjectFull: Dissolved Organic Matter analysis
        Type: general
      – SubjectFull: Dissolved Organic Matter chemistry
        Type: general
      – SubjectFull: Oceans and Seas
        Type: general
      – SubjectFull: Carbon Sequestration
        Type: general
    Titles:
      – TitleFull: Global dispersal of macroalgae-derived recalcitrant DOC may substantially contribute to deep-ocean carbon storage.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Feng X
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            NameFull: Nair S
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            NameFull: Hancke K
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            NameFull: Li H
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            NameFull: Zhang Z
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            NameFull: Zheng Q
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            NameFull: He C
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            NameFull: Shi Q
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            NameFull: Bellerby R
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            NameFull: Jiao N
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            NameFull: Zhang Y
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      – BibEntity:
          Dates:
            – D: 25
              M: 09
              Text: 2026 Sep 25
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-electronic
              Value: 2375-2548
          Numbering:
            – Type: volume
              Value: 12
            – Type: issue
              Value: 39
          Titles:
            – TitleFull: Science advances
              Type: main
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