Replication data for "Urbanization can increase the invasive potential of alien species"

It was also used to explore whether a trophic mechanism helps explain the success of invaders in urban systems. All data come from one single model species, the guppy, Poecilia reticulata, which occurs in both urban and non-urban aquatic systems worldwide.

This study took place in Rio de Janeiro, Brazil, where guppies have invaded many brackish and freshwater systems. We selected 6 urban stream reaches and 6 non-urban stream reaches, with the selection of urban streams based on the presence of development and evident direct sewage input, while non-urban streams were located inside parks and forest reserves. Within each treatment (urban, non-urban), 3 reaches had guppies as the only fish (guppy only), while in the other 3 guppies co-occurred with potential competitors and predators (guppy and other fish species).