SARAH HARRISON SUCCESSFULLY DEFENDS HER THESIS

SHarrison defense

Sarah Harrison, a student in the Joye lab, successfully defended her thesis “LESSONS FROM THE TAYLOR ENERGY OIL SPILL: HISTORY, SEASONALITY, AND NUTRIENTS LIMITATION” on October 16, 2017. Her thesis features some of the first geochemical and biological measurements at the site and establishes surface waters of the Taylor Energy site as a seasonally dynamic environment with a robust and persistent hydrocarbon degrading microbial community. Congrats Sarah!

Investigating the chemistry of marine aerosol particles and their influence on clouds

The influence of aerosol particles on clouds remains one of the largest uncertainties in accurately predicting the Earth’s energy balance in a changing climate system. The size and chemical composition of aerosol particles affects their radiative properties and ability to grow into cloud droplets, thus influencing the properties and lifetimes of cloud. Recent studies suggest that the presence of surface-active organics (surfactants) in these particles may play a role in cloud droplet growth, but the surfactant properties of aerosol particles are not well-constrained.

Grad Students Present Research at 2017 Institute of Bioinformatics Symposium

Two graduate students- Brent Nowinski and Tito Montenegro- presented exciting Marine Science research at the UGA IOB Symposium (titled Parsing the Microbiome). Below are the abstracts (and additional contributors) associated with the presentations. 

Dimethylsulfoniopropionate Degradation in the Coastal Ocean: Gene- and Taxon-centric Approaches

Aquatic ecology in Southwest Florida

Dr. Toshi Urakawa is an associate professor of marine and Ecological Sciences at Florida Gulf Coast University, which is a new public university mainly focused on undergraduate study and located in Fort Myers, Florida. In Southwest Florida his research has included: the nitrogen cycle and associated microorganisms; cyanobacteria and freshwater restoration; aquaculture; conservation biology, which include smalltooth sawfish and Burmese Pythons, using molecular ecology techniques.

Sensing more than a quorum: what are bacteria saying about their hosts?

Many host-associated bacteria use pheromone-signaling (PS) systems to coordinate group behaviors.  Such signaling requires high cell density, and is often referred to as “quorum sensing”.  However, a high cell density “quorum” may be necessary but not sufficient to induce a behavior. Our understanding of the light-organ symbiosis between the bioluminescent bacterium Vibrio fischeri and the Hawaiian bobtail squid Euprymna scolopes suggests that the bacteria could use PS as a way to communicate information about host microenvironments.

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