AI Article Synopsis

  • The study investigates how urbanization and socioeconomic differences in neighborhoods affect ecological relationships and evolutionary processes, particularly focusing on goldenrod gall flies and their predators.
  • It was found that bird predation is stronger in wealthier neighborhoods, leading to a natural selection for smaller galls, while lower-income neighborhoods see increased attacks from wasps and beetles without a corresponding strength of selection.
  • The research highlights the significant impact that human social patterns and income levels can have on the dynamics between predators and prey, suggesting that urban socioeconomic variations can reshape ecological and evolutionary outcomes.

Article Abstract

As urbanization expands, it is becoming increasingly important to understand how anthropogenic activity is affecting ecological and evolutionary processes. Few studies have examined how human social patterns within cities can modify eco-evolutionary dynamics. We tested how socioeconomic variation corresponds with changes in trophic interactions and natural selection on prey phenotypes using the classic interaction between goldenrod gall flies (Eurosta solidaginis) and their natural enemies: birds, beetles, and parasitoid wasps. We sampled galls from 84 sites across neighbourhoods with varying socioeconomic levels, and quantified the frequency of predation/parasitism on flies and natural selection by each enemy. We found that bird predation was higher in the highest income neighbourhoods, increasing the strength of selection for smaller galls. Wasp and beetle attack, but not their strength of selection, increased in lower income neighbourhoods. We show that socioeconomic variation in cities can have strong unintended consequences for the ecology and evolution of trophic interactions.

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http://dx.doi.org/10.1111/ele.14407DOI Listing

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