I am interested in population and community dynamics in northern ecosystems, where climatic and ecological responses to global change are expected to be most pronounced. My research involves many approaches aimed at divulging and understanding ecological consequences of climate change. The techniques I use include observational fieldwork, large-scale field experimentation, and quantitative analytical modeling of long-term data.
Current research projects I and my students are conducting include:
* experimental manipulation of near-surface temperatures in arctic meadows to investigate spatial dynamics of plant phenological response to climate change;
* analytical modeling of the role of large-scale climatic warming in the spatial dynamics of plant phenology and timing of bird migration;
* observational monitoring of relationships between timing of reproduction by caribou and plant phenology in arctic Greenland;
* analysis of spatial synchrony in the population dynamics of caribou and muskoxen in Greenland;
* experimental assessment of the role of caribou and muskoxen in mediating vegetation response to climate change in Greenland;
* spatio-temporal niche separation among multiple predators in a single-prey system in sub-arctic Alaska; and
* analytical modeling combined with observational fieldwork to assess influences of large-scale climatic fluctuation on population dynamics of neotropical-nearctic migratory birds.
