As a first year graduate student, Dr. Colleen Cavanaugh predicted and discovered chemosynthetic bacteria living in giant tubeworms found at deep-sea vents. Using a combination of electron microscopy and biochemistry, Cavanaugh showed that the bacteria metabolized sulfur and generated chemical energy for the mouthless and gutless worms. In turn, the worms provide the bacteria with an environment rich in both hydrogen sulfide and oxygen for energy production and CO2 fixation. Cavanaugh went on to discover similar chemosynthetic symbioses in coastal bivalves and numerous other marine invertebrates.
|Download: High ResLow Res|
|Trouble Viewing? Try it on iTunes.Report a problem.|
About the Speaker
Colleen Cavanaugh is the Edward C. Jeffrey Professor of Biology, in the Department of Organismic and Evolutionary Biology, and the Co-Director of the Microbial Sciences Initiative at Harvard University. Cavanaugh’s lab studies the symbiotic partnerships between bacteria and marine invertebrates, including those found at deep-sea hydrothermal vents, methane seeps and in coastal sediments. Cavanaugh has traveled the world on research cruises and is one of the few scientists in the world who has visited, in the submersible Alvin, the fantastic environment found around sea vents at depths of greater than 2.5 km (1.5 miles). Cavanaugh is an elected fellow of the American Academy of Microbiology and of the American Academy for the Advancement of Science.
Learn more about Dr. Cavanaugh’s research http://cavanaughlab.oeb.harvard.edu/home
- Julie Huber iBioMagazine: Microbial oceanography
- Margaret McFall-Ngai iBioSeminar: Living together: The symbiosis of host-microbial interactions
- Diane Newman iBioSeminar: Microbial diversity and evolution
- Jared Leadbetter iBioSeminar: Termites and their symbiotic gut microbes
- Lora Hooper iBioSeminar: Mammalian gut microbiota
- Nancy Knowlton iBioSeminar: Corals and coral reefs