Data from: Periodic environmental disturbance drives repeated ecomorphological diversification in an adaptive radiation of Antarctic fishes

• Main Authors: Parker, Elyse, Zapfe, Katerina L., Yadav, Jagriti, Frédérich, Bruno, Jones, Christopher D., Economo, Evan P., Federman, Sarah, Near, Thomas J., Dornburg, Alex
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: Notothenioidei; morphospace disparity; phylogenomics; Antarc*; Antarctic; Southern Ocean
• Online Access: https://doi.org/10.5061/dryad.bk3j9kdbg

The ecological theory of adaptive radiation has profoundly shaped our conceptualization of the rules that govern diversification. However, while many radiations follow classic early burst patterns of diversification as they fill ecological space, the longer-term fates of these radiations depend on many factors, such as climatic stability. In systems with periodic disturbances, species-rich clades can contain nested adaptive radiations of subclades with their own distinct diversification histories, and how adaptive radiation theory applies in these cases is less clear. Here, we investigated patterns of ecological and phenotypic diversification within two iterative adaptive radiations of cryonotothenioid fishes in Antarctica's Southern Ocean: crocodile icefishes and notoperches. For both clades, we observe evidence of repeated diversification into disparate regions of trait space between closely related taxa and into overlapping regions of trait space between distantly related taxa. We additionally find little evidence that patterns of ecological divergence are correlated with evolution of morphological disparity, suggesting that these axes of divergence may not be tightly linked. Finally, we reveal evidence of repeated convergence in sympatry that suggests niche complementarity. These findings reflect the dynamic history of Antarctic marine habitats, and may guide hypotheses of diversification dynamics in environments characterized by periodic disturbance. Descriptions of code scripts: procD-pgls.R R script used to test for correlations among Procrustes body shape coordinates and major axes of ecological disparity using phylogenetic generalized least squares (PGLS) regression. These analyses were performed using the procD.pgls function implemented in the R package geomorph (Baken et al. 2021; Adams et al. 2021). PGLS.R R script used to test for relationships among phenotypic (body size and PC axes 1-3 of body shape variation) and ecological (buoyancy, depth, and PC axes 1-3 of diet variation) variables using ...