I will present three examples of eco-evolutionary dynamics. The studies vary in the degree to which they utilize mathematical models, the degree of empiricism, and the degree to which models and empirical findings are linked. Study 1 is concerned with a relatively artificial laboratory predator-prey system. This is the first system, for which a complete feedback cycle between ecological and evolutionary dynamics could be demonstrated. Study 2 reports evolution of resistance in a guppy-monogenean parasite-host system in a field experiment in tropical streams. Surprisingly, relaxed selection (absence of parasites) leads to increased resistance in this complex field situation. Study 3 analyzes a mathematical model of evolutionary rescue in a community context. The idea that species may be able to avoid extirpation due to rapid environmental change through equally rapid adaptation has only been tested for single-population systems. I will show that evolutionary rescue can also occur in complex communities and that it has a distinctive dynamic signature.