Fig. 2: Species’ thermal bias is correlated with a gradient of occupancy responses over warming and transitional phases, but not over climate stasis phases.
From: Marine species and assemblage change foreshadowed by their thermal bias over Early Jurassic warming
A Summary of the climatic phases under study, with ammonite (sub)zone time bins on the x-axis. The solid line shows the main pCO2 scenario, while the dotted line shows more extreme estimates. The stage boundary absolute timing has an estimated uncertainty of ±0.4 Ma89. The T-OAE occupies most of the Exaratum ammonite subzone. B–F Each panel shows two regressions: the solid line regressions run across immigrant, persisting, and extirpated species responses only; the dashed line regressions run across all five ordered response levels. Regressions use random effects to nest regions within time zones. Circles show species responses with a small horizontal jitter to avoid overplotting of points against their thermal biases per region, the numbers of which are given along the x-axes, with box plots showing the medians and interquartile ranges, with whiskers extending to the furthest values within an additional 1.5x interquartile range. Significance testing was two-tailed, with exact p-values in C 0.0004 (upper) and 4.21E−14 (lower), and in D 8.35E−06. Source data are provided as a Source Data file.
