Ubiquity of inverted ’gelatinous’ ecosystem pyramids in the global ocean

Type : ACL
Nature : Production scientifique
Au bénéfice du Laboratoire : Oui
Statut de publication : Publié
Année de publication : 2024
Auteurs (30) : LOMBARD Fabien GUIDI Lionel BRANDÃO Manoela,c PEDROS-ALIO Carlos COLIN Sébastien DOLAN John,r ELINEAU Amanda GASOL Josep,m GRONDIN P,l HENRY Nicolas IBARBALZ Federico,m JALABERT Laetitia LOREAU M MARTINI Séverine MERIGUET Zoe PICHERAL Marc PIERELLA KARLUSICH Juan,j PEPPERKOK Rainer ROMAGNAN Jean-baptiste ZINGER Lucie TARA OCEANS Coordinators STEMMANN Lars ACINAS Silvia,g KARP-BOSS Lee BOSS Emmanuel SULLIVAN Matthew,b DE VARGAS Colomban BOWLER Chris KARSENTI Eric GORSKY Gabriel
Revue scientifique : bioRxiv
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DOI : 10.1101/2024.02.09.579612
URL : http://biorxiv.org/content/early/2024/02/12/2024.02.09.579612.abstract
Abstract : Plankton are essential in marine ecosystems. However, our knowledge of overall community structure is sparse due to inconsistent sampling across their very large organismal size range. Here we use diverse imaging methods to establish complete plankton inventories of organisms spanning five orders of magnitude in size. Plankton community size and trophic structure variation validate a long-held theoretical link between organism size-spectra and ecosystem trophic structures. We found that predator/grazer biomass and biovolume unexpectedly exceed that of primary producers at most (55%) locations, likely due to our better quantification of gelatinous organisms. Bottom- heavy ecosystems (the norm on land) appear to be rare in the ocean. Collectively, gelatinous organisms represent 30% of the total biovolume (8-9% of carbon) of marine plankton communities from tropical to polar ecosystems. Communities can be split into three extreme typologies: diatom/copepod-dominated in eutrophic blooms, rhizarian/chaetognath-dominated in oligotrophic tropical oceans, and gelatinous-dominated elsewhere. While plankton taxonomic composition changes with latitude, functional and trophic structures mostly depend on the amount of prey available for each trophic level. Given future projections of oligotrophication of marine ecosystems, our findings suggest that rhizarian and gelatinous organisms will increasingly dominate the apex position of planktonic ecosystems, leading to significant changes in the ocean’s carbon cycle.Competing Interest StatementThe authors have declared no competing interest.
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Citation :
Lombard F, Guidi L, Brandão MC, Pedros-Alio C, Colin S, Dolan JR, Elineau A, Gasol JM, Grondin PL, Henry N, Ibarbalz FM, Jalabert L, Loreau M, Martini S, Meriguet Z, Picheral M, Pierella Karlusich JJ, Pepperkok R, Romagnan J-B, Zinger L, Tara Oceans C, Stemmann L, Acinas SG, Karp-Boss L, Boss E, Sullivan MB, De Vargas C, Bowler C, Karsenti E, Gorsky G (2024) Ubiquity of inverted ’gelatinous’ ecosystem pyramids in the global ocean. bioRxiv | doi: 10.1101/2024.02.09.579612