Understanding biodiversity in the Gulf of Mexico using eDNA

Luke Thompson - Mississippi State University

Assessing ecosystem responses of Gulf of Mexico coastal communities to ocean acidification using environmental DNA

Why we care 
Recent efforts to monitor ocean acidification in the Gulf of Mexico via the Gulf of Mexico Ecosystems and Carbon Cycle (GOMECC) cruises have revealed spatial differences in ocean acidification. While we know that ocean acidification negatively impacts many species and exacerbates the effects of oxygen limitation and harmful algal blooms, there is little work to monitor or predict the effects of ocean acidification on biodiversity. This project employs cutting-edge technology using environmental DNA to assess biodiversity in different conditions in the Gulf of Mexico region.

What we are doing
Every organism sheds DNA. This project analyzes environmental DNA (eDNA), which is free-floating or microscopic DNA found in seawater, collected during the 4th GOMECC cruise, to identify biodiversity of bacteria, plankton, and fish in the Gulf of Mexico. eDNA will be compared to ocean properties to draw conclusions about drivers of biodiversity. 

Benefits of our work
Links between eDNA, ocean acidification, and other ocean properties will provide a deeper understanding of environmental drivers of biodiversity. These relationships can inform predictions of biodiversity patterns and guide the management of key habitats in the Gulf of Mexico, and help us adapt to changing ocean conditions.


Tuesday, June 14, 2022

Ocean Acidification at a Crossroad– Enhanced Respiration,Upwelling, Increasing Atmospheric CO2, and their interactions in the northwestern Gulf of Mexico”

Xinping Hu, Texas A&M University-Corpus Christi

Among the NOAA designated Large Marine Ecosystems, the Gulf
of Mexico (GOM) remains poorly understood in terms of its current OA conditions, despite its
ecological and economic significance. In the northwestern GOM (nwGOM), decadal
acidification has been observed in the shelf-slope region, with metabolic production of CO2
contributing to a larger fraction of CO2 accumulation than uptake of anthropogenic CO2, and the
observed rate of acidification is significantly greater than that in other tropical and subtropical
areas. Unfortunately, whether the observed OA in this region represents a short-term
phenomenon or a long-term trend is unknown.
It is hypothesized that increasing atmospheric CO2, increasing terrestrial nutrient export
due to an enhanced hydrological cycle, and enhanced upwelling due to climate change will cause
the continental shelf-slope region in the nwGOM to acidify faster than other tropical and

subtropical seas. In order to test this hypothesis wave gliders, in -stiu sensor along withe underway measurements from research vessels will measure carbonated chemistry in in surface and shallow  waters. Modeling will be used tp integrate the chemical signals into the models to hindcast/predict spatia; and temporal variation of the OA signal for the the optimization of monitoring design and implementation.

Tuesday, March 3, 2020
The spirit of collaboration aboard Gulf of Mexico cruise

The spirit of collaboration aboard Gulf of Mexico cruise

NOAA Research &Ocean Acidification Program

This summer, NOAA and partner scientists will conduct their most collaborative ocean acidification sampling of the Gulf of Mexico yet. Set to depart today, July 18th, the Gulf of Mexico Ecosystems and Carbon Cruise (GOMECC-3) will travel through international waters with 24 scientists from the United States, Mexico and Cuba on board.
Tuesday, July 18, 2017
NOAA and Partners Launch Research Cruise of East Coast to Study Ocean Acidification

NOAA and Partners Launch Research Cruise of East Coast to Study Ocean Acidification

By: NOAA Ocean Acidification Program

NOAA and scientists from PrincetonOld Dominion University, and the Universities of New HampshireDelaware, and Miami set off on June 19th from Newport, Rhode Island aboard NOAA ship Gordon Gunter on a research cruise to better understand ocean acidification and its drivers along the U.S. East Coast. 

This research cruise is just one part of a larger effort supported by the NOAA Ocean Acidification Program to better understand how ocean chemistry along all the U.S. coasts is changing in response to ocean acidification and where marine organisms may be at greatest risk. Similar cruises have taken place on the U.S. West Coast and the Gulf of Mexico. Understanding why and how fast our ocean chemistry is changing in different areas will allow scientists to better predict future changes and explore ways to adapt to those shifts.

Monday, June 22, 2015
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