Graduate Student Researcher, Homyak Lab, Environmental Science, University of California Riverside. September 2020-Present

Junior Specialist, Homyak Lab, Environmental Science, University of California Riverside. January 2019-September 2020

Undergraduate Research Assistant, Schimel Lab, EEMB, University of California Santa Barbara. January 2017- June 2018

Ph.D. Student Homyak Lab, Environmental Science, University of California Riverside. September 2020-Present

B.S. Ecology and Evolution, University of California Santa Barbara. June 2018

Dryland ecosystem response to elevated nitrogen deposition.

Mechanisms controlling gaseous and hydrologic losses of nitrogen in dryland systems.

Understanding impacts of dryland ecosystem change on at risk communities.

Drylands are exposed to some of the highest rates of nitrogen (N) deposition and cover 1/3 of the Earth’s surfaces. These elevated N inputs can adversely affect ecosystems through nutrient imbalances, acidification, and eutrophication. It is understood that ecosystems have a finite capacity to assimilate N, thus becoming "N saturated". However, is unclear how typically N limited systems like drylands that may be eager to assimilate N will respond to increased N deposition. Some preliminary work has demonstrated that dryland soils can experience relatively high losses of N in the form of N₂O and NO_x gasses. Therefore, there is a need to understand the mechanisms controlling N losses from drylands ecosystems. By using a spatial gradient in N deposition while maintaining vegetation and elevation we can begin to uncover the controls on N loss.

Greene, A.C. Mechanisms Controlling Nitrogen Losses in Dryland Ecosystems. American Geophysical Union: December 2020. Poster

Greene, A.C. Nitrous oxide emissions in response to wetting dryland soils along a carbon gradient. American Geophysical Union: December 2019. Poster

Greene, A.C. Effects of drought on soil nitrogen. UCSB Undergraduate Research Slam: June 2018. Oral Presentation