Ma, ChaoTang, YanjieFoley, StephenYe, ChenyangYing, JifengZhao, XinmiaoXiao, YanZhang, Hongfu2025-05-122025-05-121525-2027https://hdl.handle.net/1885/733750055The Middle‒Late Mesozoic massive volcanism formed a considerable thickness of volcanic-sedimentary strata in western Liaoning, northern China. Concomitantly, it elevated phosphorus (P) availability for the rapid bloom of the terrestrial Yanliao and Jehol biotas, which developed highly abundant biodiversity and biomass. Hence, systematic tectonic and geochemical analyses of these volcanic-sedimentary sequences with a significant P fluctuation would advance our understanding of the coevolutionary relationship between terrestrial biotas and regional tectonics. Here, we show that the secular variation of P availability in the Mesozoic volcanic rocks were the immediate results of the changes in volcanic intensity and lithospheric thickness controlled by the geological background of the cratonic destruction resulting from the paleo-Pacific plate subduction. This study reveals the constraint effect of regional tectonics on the evolution of terrestrial ecosystems through the volcanism and P cycle.This work was supported by the National Natural Science Foundation of China (Grants 41725014 and 42288201).application/pdfen-AU©2022 The authorshttp://creativecommons.org/licenses/ by-nc-nd/4.0/202210.1029/2022GC0105362023-12-10Creative Commons Attribution licence