My research focus on various aspects of Arctic ecosystems. My research interests include the interactions between climate, vegetation, and animal populations, with a particular focus on the role of herbivores like lemmings and reindeer. A major focus has been how herbivores and climate change together affect the composition of vegetation and the function of ecosystems in the Arctic. Since many herbivores are active all year round, a year-round perspective on ecosystem function has been central, and research on herbivores, plants and soil processes during the winter has therefore been in focus. My current research projects focus on circumpolar studies of the importance of herbivores across the Arctic, understanding the mechanisms by which herbivores affect ecosystem function, and understanding how the effect of herbivores on ecosystems varies on different spatial and temporal scales. Reindeer, voles and lemmings are the most central herbivores in my research, and tools such as enclosures that exclude herbivores, drones for vegetation studies, and camera traps for small walkers are important methods in the research. Although much of the research has a circumpolar significance, Abisko in northern Sweden has been the center point of much of the field-based research for almost three decades.
In addition to my research, I am also the vice dean for research at the faculty of technology and science.