a, Carbon flux in mg m⁻² d⁻¹ and carbon export at 150 m estimated from particle size distribution and abundance measured with the underwater vision profiler (UVP). Stations at which environmental data are available (Supplementary Table 9) are depicted by white dots. Stations at which eukaryotic samples are available are coloured in red (Supplementary Tables 10 and 12). b, Eukaryotic lineages associated to carbon export as revealed by standard methods for regression-based modelling (sPLS analysis). Correlations between lineages and environmental parameters are depicted as a clustered heat map and lineages with a correlation to carbon export higher than 0.2 are highlighted (detailed results in Supplementary Table 1).