Trophic amplification: A model intercomparison of climate driven changes in marine food webs

S5 Fig. The percentage of surface covered by each total consumer biomass response type, for the nine considered MEMS, under IPSL-SSP5-8.5 modelling. (TIF) S6 Fig. Model agreement on biomass response types projected in the 2090s, under IPSL-SSP5-8.5 configuration. Response types correspond to at least seven out of nine models in agreement for the coloured cells while grey cells indicate where less than seven models proj- ect the same type of response and white cells where no data were available. The percentage numbers in the pie chart correspond to the relative surface areas. (TIF) S7 Fig. Evolution of R ratio (total consumer biomass change divided by NPP change) in regards to SST increase relative to reference period. Where NPP is expected to decrease (a), or increase (b) under IPSL-SSP5-8.5 combination. Grey lines separate biomass response types. (1), (2) and (3) refer to positive inversion, negative attenuation and negative amplification, respectively, while (4), (5) and (6) refer to positive inversion, negative attenuation and negative amplification, respectively. (TIF) S8 Fig. Comparison between change over time in the total consumer production and change in total consumer biomass. Under EcoTroph simulation (first row) FEISTY simula- tion (second row) and BOATS simulation (third row). The Left and the right plots correspond to GFDL-SSP5-8.5 and IPSL-SSP5-8.5 forcing, respectively. Blue, and red lines correspond to the total consumer biomass change and total consumer production change, respectively. (TIF)

S9 Fig. Ensemble projections of low trophic level drivers change and total consumer biomass changes, relative to 1995–2014, under SSP5-8.5 and for all the considered MEMs with the GFDL-SSP5-8.5 forcing (a) and with the IPSL-SSP5-8.5 forcing (b). For temporal trends, all values are relative to the standardised reference period of 1995–2014. Vertical grey line indi- cates the last year of the historical period. Full lines correspond to MEMs’ total consumer bio- mass change and lines with diamonds to MEMs’ low trophic level changes. (TIF) Acknowledgments We thank ISIMIP for assistance with processing ESM inputs and outputs and the ESM/MEM community for enabling these impact analyses. This work has been conducted as part of a col- laboration between L’Institut Agro, Rennes, and the University of British Columbia, Vancou- ver. We further thank Jerome Guitton for his technical support. Author Contributions Conceptualization: Vianney Guibourd de Luzinais, Hubert du Pontavice, Gabriel Reygondeau, William W. L. Cheung, Didier Gascuel. Data curation: Vianney Guibourd de Luzinais, Hubert du Pontavice, Nicolas Barrier, Julia L. Blanchard, Matthias Bu¨chner, Jason D. Everett, Jerome Guiet, Olivier Maury, Camilla Novaglio, Colleen M. Petrik, Jeroen Steenbeek. Formal analysis: Vianney Guibourd de Luzinais. Funding acquisition: William W. L. Cheung, Didier Gascuel. PLOS ONE Trophic amplification revealed PLOS ONE | https://doi.org/10.1371/journal.pone.0287570 August 23, 2023 19 / 23