original_query: What is the focus of eco-evolutionary dynamics research?
query: What is the focus of eco-evolutionary dynamics research on three-spined sticklebacks?
answer: Eco-evolutionary dynamics research on three-spined sticklebacks focuses on how ecological processes affect evolution, and how those evolutionary changes feed back to influence ecological processes.  This is particularly studied in the context of adaptive radiation (species diversifying to occupy different ecological niches) and host-parasite coevolution.