February 26, 2026
Grant: $1000 in Spring 2024
Education level at the time of the grant: PhD student
Project Description:
Nitrogen deposition is accelerating under global change and can have negative cascading effects on ecosystem function. One potentially detrimental consequence of nitrogen deposition is its influence on soil carbon cycling, as excess nitrogen availability alters microbial physiological functioning and can result in positive or negative soil-climate feedbacks. Newer evidence suggests that nitrogen-induced shifts in soil pH may better predict soil carbon losses or gains across ecosystems, yet the mechanisms linking soil pH to microbial processes remain poorly understood. In this project, I investigated whether soil pH influences microbial metabolism and soil carbon by altering macro- and micronutrient availability. I found that pH-driven changes in nutrient availability regulate microbial respiration, and that a soil’s buffering capacity can predict the magnitude and direction of these responses.
How did the grant process or the project itself influence you as a scientist/researcher?
Funding from Sigma Xi through the GIAR program provided an opportunity to pursue my own research interests in bridging the gap between biogeochemical mechanisms and large-scale global change dynamics. Designing and writing the proposal helped me develop questions that were grounded in terrestrial biogeochemistry but broad enough to be tested across distinct ecosystem types, which is an approach often avoided due to the extreme heterogeneity of soils. Most importantly, this experience helped me gain confidence as an independent scientist and learn skills that I can take with me throughout my career.
What advice would you give to future applicants?
Just apply! Successful grant applications as a young scientist often involves trial and error. One of my previous proposal submissions was rejected, but the GIAR reviewers provided constructive feedback that helped improve a future submissions and lead to a better proposal overall. The application process also creates valuable opportunities to seek recommendations and advice from colleagues and mentors, you might not have sought out without the construct of the grant writing process.
Where are you now?
I am currently an ORISE Research Fellow with the USDA Agricultural Research Service where I study the effects of cattle grazing on soil carbon cycling with the goal of identifying management practices that improve soil carbon stocks, ecosystem functions, and ecosystem services rangelands provide.
Students may apply for Sigma Xi research grants by March 15 and October 1 annually at www.sigmaxi.org/giar.