We’re moving

Although many have already heard the news, I think it’s time to make an official announcement and fill in a few details. After five and a half very good years here at LSU, the lab is moving to the University of Southern California. Starting in January 2019, we’ll be joining the Marine and Environmental Biology section of the Department of Biological Sciences, in the Dornsife College of Letters, Arts and Sciences. In addition to a strong emphasis on marine microbiology and biogeochemistry, MEB has close connections with the Geobiology faculty in the Department of Earth Sciences and the Center for Dark Energy Biosphere Investigations (C-DEBI). As part of this transdisciplinary group, we will continue to investigate microbial functions and ecology in aquatic systems, and advance our emphasis on combining cultivation with ‘omics methodologies. Our high-througput culturing protocol will get some upgrades, and we’ll be adding Pacific Ocean prokaryotes to our culture collection. I’m personally very grateful to the support we’ve received here at LSU over the years, and I know I will remember our time in Baton Rouge fondly. We are also very excited to become part of the USC family and join the close collaborative atmosphere among the related micro, geo, chem, and physics faculty.

Summer Thrash Lab Events

The lab is active this summer. I spoke at ASM’s Microbe2018 in Atlanta and just returned from presenting a poster at the Marine Microbes GRC in beautiful Barga, Italy. Mike is heading to ISME17 in Leipzig, Germany to present his work later this month. Mike, Celeste, and I have also been traipsing all over southern Louisiana in support of our NSF-funded project to unravel lineage-specific evolutionary adaptations to alternative salinity regimes in coastal SAR11 bacterioplankton. Every month we cover over 800 miles to get to our four coastal sites.

We also welcome Jordan Coelho to the lab as our newest Ph.D. student! Jordan just finished a second bachelors degree, this time in microbiology, from Oregon State University and worked in the lab of Kim Halsey. Later this month we’ll be joined by Alex Hyer, another Ph.D. student coming from the University of Utah. He worked in the lab of William Brazelton and is currently doing a summer internship with NASA! We’re excited to have you both with us, Jordan and Alex.

Emily wins the Socolofsky Award

Congratulations Emily on four years of hard work that have been recognized with the Socolofsky Award for undergraduate microbiology research. Some more on the award from the LSU Biological Sciences Undergraduate Student Awards website:

“The recipient shall be a Senior and shall be a full-time student engaged in a research project with one of the faculty members who is conducting microbiological research. This award recognizes significant research accomplishments, particularly presentations at scientific meetings or co-authorship of journal manuscripts.”

Emily is the second Thrash Lab undergraduate to receive this award. Her work on the OM252 clade (LSUCC0096) will be the subject of her Honors Thesis and is set to be a first authorship paper. Great work Emily! We’re so lucky to have you in the lab!


Mike wins McDaniel Travel Award to attend #ISME17

Congratulations to Mike on winning the LSU Biological Sciences McDaniel Travel Award! 1000 clams goes a long way! Some notes on this memorial award, from the LSU Graduate Student Awards website:

“The McDaniel Travel Award is a competitive award that memoralizes Michael McDaniel, a promising graduate student who  died tragically in the second year of his PhD program.  Established by his family and given semi-annually the award funds travel expenses for graduate students to attend national or international meetings in the Biological Sciences and to present a paper or poster on the graduate research of the students.”

Mike will use this prestigious award to help him present at #ISME17 in Leipzig, Germany.


Our LD12 cultivation manuscript has been published

Our paper on the cultivation and genomics of the freshwater SAR11 strain LSUCC0530 has been published online in the ISME Journal (Here). The SAR11 LD12 lineage evolved to colonize freshwater ecosystems, and, like its marine cousins, occurs as one of the most abundant freshwater bacterioplankton worldwide. Strain LSUCC0530 represents the first cultivated representative of the LD12 clade and presented the Thrash lab with an unprecedented opportunity to provide new insights into the important evolutionary processes behind marine-freshwater transitions. Specifically, we demonstrated the capacity of strain LSUCC0530 to grow in salinities up to 5, provided evidence for LD12 ecotype differentiation based on temperature, and developed a hypothesis on how the loss of key genetic functions enabled the SAR11 clade to transition into fresh water. This work is only the beginning of our exploration into the SAR11 LD12 clade and its marine-freshwater transition, so be on the look out for more data soon!

If you have any questions or want to know more about LSUCC0530, please feel free to contact us! We are more than willing to answer any questions you may have.

Henson, Michael W.,  V. Celeste Lanclos, Brant C. Faircloth, and J. Cameron Thrash. (2018) Cultivation and genomics of the first freshwater SAR11 (LD12) isolate. The ISME Journal. AOP.


Sampling at the Calcasieu Jetties

On Monday, January 15th, I got to join Celeste on a sampling trip to Calcasieu Jetties in Cameron, Louisiana. This was my first time going on a sampling trip since joining the Thrash Lab. While it was quite a cold morning, it was still a fun time. There were some beautiful views along the way of Louisiana’s marshes.

View of the marshes

Once we got to the sampling site, Celeste had the joy of wading out into the cold water and collecting.  At least it was a beautiful morning with the sun shining down and bright blue skies.

The sampling site
Celeste striking a victory pose after collecting the water sample
Celeste filtering the sample

The purpose of this trip was to obtain a water sample for the mCURE sections of introductory biology lab. Using this sample, the students will learn high throughput cultivation protocols used in the Thrash Lab. I’m happy to have been able to help with the fieldwork and hope that the students enjoy learning about what our lab does.

Thrash Lab presentations at Ocean Sciences

We’re going to Ocean Sciences in Portland next week. Both Celeste and Mike have posters on Thursday, February 15th from 1600-1800:

MM44A-1512: The Ecology, Physiology, and Genomic Analysis of Novel SAR11 Isolates

MM44A-1513: Cultivation, genomics, and characterization of the first isolate from the freshwater SAR11 clade LD12

Session MM44A: Functional, Ecological, and Evolutionary Implications of Microdiversity and Intraspecific Variability in Aquatic Microorganisms I.