Tacy Guest ’26, Ecology and Evolutionary Biology

Tacy Guest ’26

Major

Ecology and Evolutionary Biology

Project Title

Nitrogen Nutrition of Corals

Presentation Link

View Tacy's Presentation

Minor(s): Climate Science, Creative Writing, Environmental Studies

I worked at the Bermuda Institute of Ocean Sciences (BIOS) to study nitrogen nutrition in corals. Corals share a symbiotic relationship with single-celled photosynthetic algae called zooxanthellae that provide coral with an energy source in the form of fixed carbon. However, little is known about the role of nitrogen within this partnership and understanding the importance of nitrogen is essential for coral reef preservation efforts. To better understand this relationship, we conducted two experiments to test the uptake and translocation of nitrogen within coral and their symbionts under both high and ambient temperature and nutrient conditions. I contributed to this study by filtering seawater, collecting coral and water samples, cutting coral and gluing them onto plexiglass with labels and changing water during the coral acclimation period. I most enjoyed the fieldwork aspect of this project, as I was able to snorkel and gain hands-on experience working with live coral. I was also able to help with other experiments at the BIOS field station, which expanded my knowledge of marine science research. This internship has confirmed my desire to work in marine science and I’m excited to continue working with the Ward lab through my junior and senior year.