Jacob S. Berv

The paper introduces bifrost, an R package for detecting shifts in multivariate trait evolution across phylogenetic trees, using a greedy search and information-criterion weights.

The paper uses computer vision to measure skeletal traits in bird species, creating a dataset of 12 skeletal elements from 14,419 individuals across 2,057 species, and imputes missing data using phylogenetic relationships.

The paper examines phenotypic evolution in three living fossil lineages, finding varied evolutionary patterns across and within lineages, suggesting idiosyncratic processes rather than uniform change.