Responses of ecological indicators to fishing pressure under environmental change : exploring non-linearity and thresholds Fu, C. H. Xu, Y. Gruss, A. Bundy, A. Shannon, L. Heymans, J. J. Halouani, G. Akoglu, E. Lynam, C. P. /Coll, Marta Fulton, E. A. Velez, L. /Shin, Yunne-Jai ecosystem-based fisheries management generalized additive model marine ecosystem model non-linear response primary productivity Marine ecosystems are influenced by multiple stressors in both linear and non-linear ways. Using generalized additive models (GAMs) fitted to outputs from a multi-ecosystem, multi-model simulation experiment, we investigated 14 major ecological indicators across ten marine ecosystems about their responses to fishing pressure under: (i) three different fishing strategies (focusing on low-, high-, or all-trophic-level taxa); and (ii) four different scenarios of directional or random primary productivity change, a proxy for environmental change. From this work, we draw four major conclusions: (i) responses of indicators to fishing mortality in shapes, directions, and thresholds depend on the fishing strategies considered; (ii) most of the indicators demonstrate decreasing trends with increasing fishing mortality, with a few exceptions depending on the type of fishing strategy; (iii) most of the indicators respond to fishing mortality in a linear way, particularly for community and biomass-based indicators; and (iv) occurrence of threshold for non-linear-mixed type (i.e. non-linear with inflection points) is not prevalent within the fishing mortality rates explored. The conclusions drawn from the present study provide a knowledge base in indicators' dynamics under different fishing and primary productivity levels, thereby facilitating the application of ecosystem-based fisheries management worldwide. 2020 text https://www.documentation.ird.fr/hor/fdi:010079915 fdi:010079915 Fu C. H., Xu Y., Gruss A., Bundy A., Shannon L., Heymans J. J., Halouani G., Akoglu E., Lynam C. P., Coll Marta, Fulton E. A., Velez L., Shin Yunne-Jai. Responses of ecological indicators to fishing pressure under environmental change : exploring non-linearity and thresholds. 2020, 77 (4), 1516-1531 EN