Andrew Hansen is Professor in the Ecology Department at Montana State University. He teaches introductory ecology to undergraduates and landscape ecology to graduate students. His research focuses on interactions among biodiversity, ecosystem processes, and land use, with an emphasis on landscape management. For example, he has examined the effects of land use change on biodiversity in nature reserves in Greater Yellowstone and five regions in the world. His work uses a combination of remote sensing, computer simulation and field studies. This research is funded primarily by NASA, EPA, USDA, conservation organizations, and the timber industry.