New paper on eco-evolutionary feedbacks predicting the time course of evolution is out in the American Naturalist (@GuppyProject)

Organisms can change their environment and, in so doing, change the selection they experience and how they evolve. Population density is one potential mediator of such interactions because high population densities can impact the ecosystem and reduce resource availability. At present, such interactions are best known from theory and laboratory experiments. Here we quantify the importance of such interactions in nature by transplanting guppies from a stream where they co-occur with predators into tributaries that previously lacked both guppies and predators.

You can read the paper here: https://www.amnat.org/an/newpapers/Nov-Reznick.html