Research ArticleECOLOGY

Let more big fish sink: Fisheries prevent blue carbon sequestration—half in unprofitable areas

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Science Advances  28 Oct 2020:
Vol. 6, no. 44, eabb4848
DOI: 10.1126/sciadv.abb4848
  • Fig. 1 Total blue carbon extraction of large fish since 1950.

    Fate of blue carbon and associated emissions (A). Blue carbon extracted by taxon (B) and by fishing sector (C). Error bars represent the lower and upper bounds of carbon content in fish bodies (10 and 15%, respectively). Spatial distribution of the blue carbon extracted since 1950 by fisheries (D). Percentage of countries’ contribution to blue carbon extraction since 1950 (E). Countries in white have no reported catches.

  • Fig. 2 Temporal and spatial changes in blue carbon extraction of large fish by fisheries.

    Temporal trends in the amount of blue carbon extracted from the oceans since 1950 by year (A). Annual difference of blue carbon (kilogram per year) extraction between the periods 1950 to 1954 and 2010 to 2014 in 0.5° × 0.5° cells (B). Average annual carbon extraction (per year and hectare) between 1950 and 1954 (C) and 2010 to 2014 (D).

  • Fig. 3 Impact of government subsidies on blue carbon extraction in the high seas.

    Percentage of blue carbon extracted in profitable areas and unprofitable areas without subsidies (A) and with subsidies (B). Spatial variability of carbon extraction and economic viability without subsidies (C) and with subsidies (D).

Supplementary Materials

  • Supplementary Materials

    Let more big fish sink: Fisheries prevent blue carbon sequestration—half in unprofitable areas

    Gaël Mariani, William W. L. Cheung, Arnaud Lyet, Enric Sala, Juan Mayorga, Laure Velez, Steven D. Gaines, Tony Dejean, Marc Troussellier, David Mouillot

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