- Plant Ecology
- Restoration Ecology
- Invasion Ecology
- Climate Change
- Data Visualization
Dr. Celis has a broad interest in terrestrial ecosystem processes, in particular how anthropogenic impacts influence these processes. He is currently working on understanding how rising arctic temperatures will affect the C balance of arctic ecosystems. He also has studied the role of exotic invasive species in the trajectory of ecosystem recovery after disturbances and identifying methods to enhance and/or speedup recovery.
Melvin, A.M., G. Celis, J.F. Johnstone, A.D. McGuire, H. Genet, E.A. G. Schuur, M. C. Mack. (2017) Fuel-reduction alters plant composition, carbon and nitrogen pools, and permafrost thaw in Alaskan boreal forest. Ecological Applications. doi:10.1002/eap.1636
Celis G., Mauritz M., Bracho R., Salmon V.G. Webb E.E., Hutchings J., Natali S.M., Schädel C., Crummer K.G., Schuur E.A.G. (2017). Tundra is a consistent source of CO2 at a site with progressive permafrost thaw during six years of chamber and eddy covariance measurements. Journal of Geophysical Research: Biogeosciences. doi:10.1002/2016JG003671