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Projects

Modeling Impacts of Hypoxia in the Northern Gulf o...

We are determining the effects of hypoxia (low dissolved oxygen) on reproduction of fish (Atlantic croaker) throughout the northern Gulf of Mexico to accurately model population outcomes and to assess ...

Multidisciplinary Approach to a Cross-Regional Pro...

Diarrhetic shellfish poisoning (DSP) has emerged as a significant and expanding seafood safety threat in coastal regions across the United States. The harmful algal species Dinophysis produces toxins known to ...

National Analytical Response to Harmful Algal Bloo...

We use extreme events to research new or changing impacts of harmful algal blooms in coastal waters. The NOAA Analytical Response Team leverages cutting-edge analytical methods and collaborative relationships with ...

New Tools to Aid in Managing Ciguatera Poisoning R...

Ciguatera fish poisoning is the most frequently reported non-bacterial illness associated with eating fish in the United States and the U. S. territorial islands. Ciguatera significantly impacts commercial and recreational ...

Operational Gulf of Mexico Hypoxia Monitoring

The Gulf of Mexico hypoxia monitoring cruise is an annual shelf-wide survey of the Gulf's hypoxic area (i.e., “dead zone”) and the survey is the metric used by the interagency ...

Research to Support Management of the Flower Garde...

We conducted an assessment of biological resources in the Flower Garden Banks National Marine Sanctuary, to serve as the basis for future sanctuary management decisions. This baseline assessment will also ...

Social Values of Ecosystem Services in Marine Prot...

We explored the connections between humans and the places they live, work, and play. Specifically, we looked at how people use, how they value, and how they depend on the ...

News

Testing the Feasibility of Robotic Gliders to Moni...

NCCOS has evaluated the use of underwater gliders to improve Gulf of Mexico hypoxic zone, also known as the dead zone, monitoring. This effort resulted in the development of a ...

Large ‘Dead Zone’ Measured in Gulf of Mexico

Dr. Nancy Rabalais (at left) and crew, aboard R/V Pelican, prepare to deploy a conductivity, temperature, and depth (CTD) carousel (rosette) containing an array of Niskin water sampling bottles. The ...

NOAA Forecasts Very Large ‘Dead Zone’ for Gulf of ...

NCCOS scientists are forecasting this summer’s Gulf of Mexico hypoxic zone or "dead zone"—an area of low to no oxygen that can kill fish and other marine life—will be approximately ...

Scientists Use New Technique to Measure Size of Gu...

Every summer, the largest hypoxic zone in the U.S. forms in the northern Gulf of Mexico, resulting in widespread ecosystem and economic impacts. Determining, and then mitigating the size of ...

NCCOS Funds $6.8M for New and Continuing Harmful A...

NOAA’s National Centers for Coastal Ocean Science (NCCOS) is pleased to announce support for 28 new and continuing harmful algal bloom (HAB) research awards in 2018. These awards, totaling $6.8M, ...

NCCOS Sends Future Science Leaders to Internationa...

The NCCOS Competitive Research Program (CRP) is providing travel funding for 11 U. S. students and post-docs to attend the 18th International Conference on Harmful Algae (ICHA) in Nantes France, ...

NCCOS and NGI Lead Seventh Annual Hypoxia Research...

NCCOS is working with the Northern Gulf Institute (NGI) and Gulf of Mexico State partners to develop a robust and sustainable Gulf of Mexico-wide monitoring program for hypoxia. At the ...

Modeling Coastal Hypoxia: NCCOS Sponsored Research...

A new book highlights NCCOS sponsored hypoxia modeling. It contains original research on numerical simulations of the patterns, controls, and effects of dissolved oxygen dynamics. The book, Modeling Coastal Hypoxia, ...

Gulf of Mexico ‘Dead Zone’ Largest Ever Measured

Scientists have determined this year’s Gulf of Mexico “dead zone,” an area of low oxygen that can kill fish and marine life, is 8,776 square miles, an area about the ...

Hypoxia Leads to Atlantic Croaker Decline in Gulf ...

Distribution of bottom-water dissolved oxygen July 28-August 3, 2015 (west of the Mississippi River delta). Black line indicates dissolved oxygen level of 2 mg/L. (Data: Nancy R. Rabalais, LUMCON, and ...

Products

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Data & Publications

Interannual Variation in Stratification over the Texas–Louisiana Continental Shelf and Effects on Seasonal Hypoxia

A numerical dye is used to track freshwater released in May and June from the Mississippi and Atchafalaya rivers using a hydrodynamic model. These months are chosen because discharge and nutrient load in May and June is significantly correlated with ...

Linking molecular microbial ecology to geochemistry in a coastal hypoxic zone

Multiple environmental mechanisms have been proposed to control bottom water hypoxia (<2 mg O2 L?1) in the northern Gulf of Mexico Louisiana shelf. Near-bottom hypoxia has been attributed to a direct consumption of oxygen through benthic microbial respiration and a ...

Long-term monitoring of ecological conditions in Gray's Reef National Marine Sanctuary: Comparison of soft-bottom benthic assemblages and contaminant levels in sediments and biota in spring 2000 and 2005

As part of an ongoing program of benthic sampling and related assessments of sediment quality at Gray's Reef National Marine Sanctuary (GRNMS) off the coast of Georgia, a survey of soft-bottom benthic habitats was conducted in spring 2005 to characterize ...

Macrobenthos and megabenthos responses to long-term, large-scale hypoxia on the Louisiana continental shelf

The macrobenthos and megabenthos responses to long-term, recurring hypoxia on the Louisiana continental shelf were compared at four locations with different historical (2000–2010) episodes of annual exposure to bottom-water hypoxia. Measurements of abundance, biomass, species diversity, and community composition of ...

Modeling Coastal Hypoxia: Numerical Simulations of Patterns, Controls and Effects of Dissolved Oxygen Dynamics

This book provides a snapshot of representative modeling analyses of coastal hypoxia and its effects. Hypoxia refers to conditions in the water column where dissolved oxygen falls below levels that can support most metazoan marine life (i.e., 2 mg O2 ...

Modeling River-Induced Phosphorus Limitation in the Context of Coastal Hypoxia

The urban development of coastal areas and the increased use of chemical fertilizers over the last century have led to a worldwide expansion of coastal eutrophication and a significant increase in the occurrence and intensity of human-induced coastal hypoxia. Proportionally, ...

Modeling the Population Effects of Hypoxia on Atlantic Croaker (Micropogonias undulatus) in the Northwestern Gulf of Mexico: Part 1 - Model Description and Idealized Hypoxia

We developed a spatially explicit, individual-based model to analyze how hypoxia effects on reproduction, growth, and mortality of Atlantic croaker in the northwestern Gulf of Mexico lead to population-level responses. The model follows the hourly growth, mortality, reproduction, and movement ...

Modeling the Population Effects of Hypoxia on Atlantic Croaker (Micropogonias undulatus) in the Northwestern Gulf of Mexico: Part 2 - Realistic Hypoxia and Eutrophication

Quantifying the population-level effects of hypoxia on coastal fish species has been challenging. In the companion paper (part 1), we described an individual-based population model (IBM) for Atlantic croaker in the northwestern Gulf of Mexico (NWGOM) designed to quantify the ...

Molecular Characterization and Hypoxia-Induced Upregulation of Neuronal Nitric Oxide Synthase in Atlantic Croaker: Reversal by Antioxidant and Estrogen Treatments

Neuronal nitric oxide synthase (nNOS) catalyzes production of nitric oxide in vertebrate brains. Recent findings indicate that endothelial NOS and reactive oxygen species (ROS) are significantly increased during hypoxic stress and are modulated by antioxidants. However, the influence of antioxidants ...

Molecular structure characterization of riverine and coastal dissolved organic matter with ion mobility quadrupole time-of-flight LCMS (IM Q-TOF LCMS)

Deciphering molecular structures of dissolved organic matter (DOM) components is key to understanding the formation and transformation of this globally important carbon pool in aquatic environments. Such a task depends on the integrated use of complementary analytical techniques. We characterize ...
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