Of the many impacts of global change, changes to global biodiversity are some of the most obvious and concerning. Species are disappearing, some are expanding their ranges naturally, and others are being transported far from their native ranges by human activities (both intentionally and unintentionally). The impacts of these large-scale changes to biodiversity are often unclear, but are potentially detrimental to the natural world and come at a cost to the world economy and humanity’s quality of life. Dr. Johansson's research attempts to understand and predict current and future distributions of biodiversity by utilizing classic and cutting-edge genetic tools and analysis methods. His current research follows two tracks. One research direction focuses on using population genetic tools to understand the population distributions of native species and the global spread of invasive species. He is also engaged in a variety of projects that utilize genetic tools to complement other research techniques, such as GIS and remote sensing, to illuminate otherwise difficult-to-study ecological and evolutionary processes.