Evolutionary Impacts of Urban Stressors
1. Are there genetic differences between urban and non-urban populations?
To compare connectivity and adaptation in urban and non-urban environments as a whole, I will be collecting spines and sequencing the genomes of 200 S. purpuratus from Los Angeles and San Diego (photos of collections below). Previous studies have classified pollutant concentrations along the Southern California Bight region, providing a basis for categorizing regions as “urban” or “non-urban” (Maruya et al., 2014). My hypothesis is that lower connectivity will exist among urban than among non-urban populations of urchins, similar to a previous study in a different species (Puritz and Toonen, 2011). Overall, this aim will provide a broad-scale view of the effects of urban stressors on population connectivity and adaptation in a widespread marine intertidal species.