Dr. Xavier Mayali
Research Scientist, Lawrence Livermore National Laboratory, Nuclear and Chemical Sciences Division
Staff Profile
Investigating algal-bacterial interactions with stable isotope probing and NanoSIMS
Tuesday, March 26
12 PM
AHF 153 (Torrey Webb Room)
Abstract: One of my primary research interests is how interactions between heterotrophic bacteria and eukaryotic algae control elemental cycling and primary productivity. This has implications in natural ecosystems (lakes and oceans) as well as engineered phototrophic systems such as photobioreactors and outdoor algal ponds. I use combinations of laboratory and field studies and methods such as 16S rRNA microbial community characterization, genomics, proteomics, and stable isotope probing combined with NanoSIMS to investigate these interactions. I will first describe how NanoSIMS-based approaches allow an unprecedented ability to quantify microbial anabolic activities at the single-species and single cell level in order to test hypotheses about microbial identity and function. I will then present several past and ongoing studies where this approach has been used to investigate microbial processing of algal-derived organic matter, climate impacts on transfer between algae and bacteria, and bacterial impacts on cell-specific algal growth.
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