Corals

UC Davis Chancellor Gary S. May sits down with assistant professor Rachael Bay to talk about the evolutionary adaptations of marine species in response to climate change in this episode of Face to Face with Chancellor May.

As winter approaches, many species of animals — from bears and squirrels to parasitic wasps and a few lucky humans — hunker down for some needed rest. The northern star coral (Astrangia poculata) also enters a hibernating state of dormancy, or quiescence, during this time. But what happens to its microbiome while it’s sleeping?

Under the right living arrangement, disease-resistant corals can help “rescue” corals that are more vulnerable to disease, found a study from the University of California, Davis, that monitored a disease outbreak at a coral nursery in Little Cayman, Cayman Islands. 

Life finds a way.

Dr. Rachael Bay, a Coastal and Marine Sciences Institute affiliate and faculty member in the UC Davis Department of Evolution and Ecology, has been named a member of the 2021 Class of Packard Fellows!

Coral reefs are foundational and iconic ecosystems that have long captivated many with their vibrant colors, interesting ecology, and ecosystem productivity. However, these beautiful reefs are facing their biggest challenge yet: climate change. How can immobile marine organisms, such as corals, survive and thrive in waters that are steadily warming? Leslie Guerrero, a PhD student in the Bay Lab at UC Davis, is working tirelessly to answer these questions.

Corals and anemones form a symbiotic partnership with photosynthetic algae based on an exchange of nutrients: the host receives sugar from the algae, the algae receives nutrients and consistent exposure to sunlight from the host. This relationship can break down under stressful conditions, a phenomenon known as 'bleaching,' which, in the case of tropical corals, can quickly lead to the death of the host. Bleaching resistance can arise if a local population consistently encounters and adapts to warmer conditions.

With the unfortunate pandemic of COVID-19 still taking place around the world, it was very difficult to secure an internship and when I was informed of my acceptance to the SRJC-BML internship program, I did not hesitate to immediately confirm my position. This summer I had the pleasure of working and exploring alongside my mentor, Ph.D. Candidate Carina Fish, who is very passionate about the deep ocean and uncovering its past environmental conditions with the help of deep-sea corals.

Corals are one of the most iconic images of the ocean, offering a spectacular scenery of vibrant, underwater castles for snorkelers and divers. But for marine biogeochemist ​Carina Fish​, these vacation spots aren’t just aesthetically pleasing. Corals are biological time capsules, making them a perfect toolset for Fish to utilize as she uncovers stories about the Earth’s past.

Rachel Bay received a Sloan Foundation fellowship to fund research on the molecular mechanisms of thermal tolerance in corals, an increasingly critical physiological process as ocean temperatures shift and warming events occur.

Read more at the UC Davis College of Biological Sciences