My research goal is to clarify the contribution of evolutionary and genetic mechanisms to the success of invasive species. This is an important knowledge gap in invasion and evolutionary biology. Identifying such mechanisms will help us understand how adaptation occurs at range margins, and over contemporary time scales. This information could also be used to limit the spread of non-indigenous species. To investigate genetic mechanisms of invasion, I first identify the traits that drive invasion success, and then dissect their genetic architecture. I achieve this by combining field experiments with genomics and bioinformatics in invasive plant or animal species. My main study systems so far have been Helianthus tuberosus sunflowers and Anolis sagrei lizards.