Victoria J. Orphan

Victoria J. Orphan is the James Irvine Professor of Environmental Science and Geobiology at Caltech, where she directs the Center for Environmental Microbial Interactions. Her research investigates microbial processes in anaerobic ecosystems including deep-sea methane seeps, hydrothermal vents, and coastal sediments using interdisciplinary approaches combining molecular biology, stable isotope techniques, and geochemistry.

Her laboratory focuses on:

• Microbial partnerships in methane cycling
• Ecophysiology of uncultured archaea and bacteria
• Viral ecology in marine environments
• Biogeochemical impacts of microbial communities
• Blue carbon sequestration in seagrass ecosystems

Professor Orphan has developed innovative methods including BONCAT-FISH and nanoSIMS for studying microbial activity in environmental samples. Her research group maintains active field programs in Monterey Canyon and hydrothermal vent systems, and develops high-pressure incubation systems for studying deep-sea microbes.

She teaches courses on microbial ecology and evolution, and mentors graduate students through the Geobiology and Environmental Science programs.