Institutional Seminar Series
Wednesday, May 27
via Zoom (link to be sent the morning of)
1:30 p.m. Talks begin w/ Q&A
Dimitri Deheyn - "Other than the occasional luminous red-tide, what else produces bioluminescence along the San Diego coastline?"
Bioluminescence, the production of visible light by living organisms, has been well displayed around SIO in the past month, with a major red tide caused by a phytoplankton that turned luminous at night. Aside from these light-producing red tides, San Diego coastline has a variety of luminous organisms that are found all year around, which the Deheyn lab studies for various interests in biotechnological applications. In this short webinar, Deheyn will describe the how’s and why’s behind bioluminescence and review a few case studies of his research. In particular, he will present some aspects of the bioluminescence in luminous brittlestars (starfish cousin), deepsea octocorallian or seapen (a sea anemone cousin), and a marine worm.
Kathy Barbeau - "Microbes, molecules and the marine ferrous wheel"
The element iron (Fe) plays a crucial role in life and climate on Earth, influencing and being influenced by the better-studied elemental cycles of carbon, nitrogen and oxygen. Over the past 30 years, we have learned a great deal about how iron cycles through the ocean, one of the most extreme environments on Earth in terms of iron scarcity. In this presentation I will discuss some of the recent discoveries my group has made about how ocean microbes cleverly use iron-binding molecules to cope with iron insufficiency and drive the marine “ferrous wheel”.