Population genomics project with S. purpuratus looking at polygenic signals of adaptation.
GOTerms_full.xlsx contains three supplementary tables of Gene Onology outputs for each city region studied (LA, San Deigo and Victoria). The tables are stored here rather than in the MS document due to the large size of the tables.
The vcf file that is from this project is stored on dryad: 10.5061/dryad.4xgxd25ph
NCBI raw files are stored at this accession number: PRJNA1317549
Urbanization results in novel environments, offering a unique opportunity to investigate natural selection on small spatiotemporal scales. Using whole genomes from Pacific purple sea urchins (Strongylocentrotus purpuratus) across three coastal cities spanning >2000km, we investigate genomic signals for adaptation to urban environments. We found genetic variants differentiating urban and nonurban sites within each city region, despite high gene flow and little evidence for differentiation across latitudinal gradients. While these SNP-level candidates for selection were largely non-overlapping, polygenic approaches uncover a distinct parallel signal of urban adaptation across the sampled range. Our results suggest that adaptation over small scale urbanization gradients is possible even in high gene flow systems and the polygenic architecture of adaptation is, at least in part, parallel. More broadly, our work highlights the importance of polygenic methods in ecological genomics in expanding our understanding of how evolutionary forces operate in natural systems.