The rise of modern-type ecosystems occurred in the earliest 50 Myr. of the Mesozoic, i.e. the Triassic, and was linked to major biological crises and environmental perturbations. Multiple Triassic hyperthermals and extinction events paced early Mesozoic evolution, determining the appearance of major biological innovations and the rise of “modern” marine and terrestrial faunas and floras. This session aims to gather together experts and early career scientists working on Triassic bio-sediments (trace fossils, carbonate buildups, oil shales, etc.) and paleoecology reconstructions. We encourage presentations on the major known Triassic environmental changes (Permian-Triassic boundary mass extinction, Carnian Pluvial Episode, Triassic-Jurassic boundary mass extinction), but also on the less-known events that marked this Period (e.g., Middle Triassic humid events, Norian warming). By discussing recent developments on the inner dynamics between Triassic biotic and environmental changes that are archived in the sedimentary record, new ideas and potential international collaborations on Triassic bio-sediments can be expected during the meeting.