FN Archimer Export Format PT J TI Nanoplanktonic diatoms are globally overlooked but play a role in spring blooms and carbon export BT AF LEBLANC, Karine QUEGUINER, Bernard DIAZ, Frederic CORNET, Veronique MICHEL-RODRIGUEZ, Monica DE MADRON, Xavier Durrieu BOWLER, Chris MALVIYA, Shruti THYSSEN, Melilotus GREGORI, Gerald REMBAUVILLE, Mathieu GROSSO, Olivier POULAIN, Julie DE VARGAS, Colomban PUJO-PAY, Mireille CONAN, Pascal AS 1:1;2:1;3:1;4:1;5:1;6:2;7:3;8:3,4;9:1;10:1;11:5;12:1;13:6;14:7;15:5;16:5; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:; C1 Aix Marseille Univ, Univ Toulon, UM110, MIO,IRD,CNRS, F-13288 Marseille, France. Univ Perpignan, Ctr Etud & Format Environm Mediterraneens, CNRS, UMR 5110, Via Domitia, F-66860 Perpignan, France. PSL Univ Paris, INSERM, CNRS, Ecole Normale Super,IBENS, F-75005 Paris, France. Tata Inst Fundamental Res, Natl Ctr Biol Sci, Simons Ctr Study Living Machines, UAS GKVK Campus,Bellary Rd, Bangalore 560065, Karnataka, India. Univ Paris 06, UPMC, Sorbonne Univ,CNRS,UMR7621, Lab Oceanog Microbienne,Observ Oceanol, F-66650 Banyuls Sur Mer, France. Genoscope, Inst Biol Francois Jacob, CEA, 2 Rue Gaston Cremieux, F-91057 Evry, France. CNRS, UMR 7144, Stn Biolog Roscoff, Pl Georges Teissier, F-29680 Roscoff, France. C2 CNRS, FRANCE CNRS, FRANCE ENS, FRANCE NCBS, INDIA UNIV PARIS 06, FRANCE CEA, FRANCE CNRS, FRANCE IF 11.878 TC 116 UR https://archimer.ifremer.fr/doc/00429/54099/55426.pdf https://archimer.ifremer.fr/doc/00429/54099/55427.pdf LA English DT Article CR DEWEX-MERMEX 2013 LEG1 DEWEX-MERMEX 2013 LEG2 MOOSE (DYFAMED) 2016 MOOSE-GE BO Le Suroît Téthys II AB Diatoms are one of the major primary producers in the ocean, responsible annually for ~20% of photosynthetically fixed CO2 on Earth. In oceanic models, they are typically represented as large (>20 µm) microphytoplankton. However, many diatoms belong to the nanophytoplankton (2–20 µm) and a few species even overlap with the picoplanktonic size-class (<2 µm). Due to their minute size and difficulty of detection they are poorly characterized. Here we describe a massive spring bloom of the smallest known diatom (Minidiscus) in the northwestern Mediterranean Sea. Analysis of Tara Oceans data, together with literature review, reveal a general oversight of the significance of these small diatoms at the global scale. We further evidence that they can reach the seafloor at high sinking rates, implying the need to revise our classical binary vision of pico- and nanoplanktonic cells fueling the microbial loop, while only microphytoplankton sustain secondary trophic levels and carbon export. PY 2018 PD MAR SO Nature Communications SN 2041-1723 PU Nature Publishing Group VL 9 IS 1 UT 000426544200004 DI 10.1038/s41467-018-03376-9 ID 54099 ER EF