Data from: Dietary specialization is linked to reduced species durations in North American fossil canids
Balisi, Mairin, University of California Los Angeles
Casey, Corinna, University of California Los Angeles
Van Valkenburgh, Blaire, University of California Los Angeles
Published Mar 20, 2018 on Dryad.
Cite this dataset
Balisi, Mairin; Casey, Corinna; Van Valkenburgh, Blaire (2018). Data from: Dietary specialization is linked to reduced species durations in North American fossil canids [Dataset]. Dryad. https://doi.org/10.5061/dryad.1pj2600
How traits influence species persistence is a fundamental question in ecology, evolution, and paleontology. We test the relationship between dietary traits and both species duration and locality coverage over 40 million years in North American canids, a clade with considerable ecomorphological disparity and a dense fossil record. Because ecomorphological generalization--broad resource use--may enable species to withstand disturbance, we predicted that canids of average size and mesocarnivory would exhibit longer durations and wider distributions than specialized larger or smaller species. Second, because locality coverage might reflect dispersal ability and/or survivability in a range of habitats, we predicted that high coverage would correspond with longer durations. We find a non-linear relationship between species duration and degree of carnivory: species at either end of the carnivory spectrum tend to have shorter durations than mesocarnivores. Locality coverage shows no relationship with size, diet, nor duration. To test whether generalization (medium size, mesocarnivory) corresponds to an adaptive optimum, we fit trait evolution models to previously generated canid phylogenies. Our analyses identify no single optimum in size or diet. Instead, the primary model of size evolution is a classic Cope's Rule increase over time, while dietary evolution does not conform to a single model.
Extinct canid dataset
Taxonomic, trait, duration, and locality coverage data for 131 species of North American fossil canids.
Slater (2015) canid tree - pruned
Topology of canid tree from Slater (2015), pruned to the species included in Balisi et al.
Scripts for principal component analysis, linear regressions, quantile regressions, and the associated plots.
Code for Figure S3
Figure S3 is a time-scaled canid tree using the pruned Slater (2015) phylogeny, with black bars representing stratigraphic ranges as calculated using PyRate.