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Projects

Integrated Ecosystem Modeling of the Causes of Hyp...

The largest low oxygen (hypoxic) zone affecting the United States is in the northern Gulf of Mexico, adjacent to the Mississippi River. This “dead zone” in the Gulf of Mexico ...
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Biological Effects of Contaminants and Nutrients, Hypoxia, Stressor Impacts and Mitigation, Gulf of Mexico, Louisiana, Texas, U.S. States and Territories, Waterbodies, david.scheurer@noaa.gov

LEOFS-Hypoxia: Operational Lake Erie Hypoxia Forec...

Deep waters of Lake Erie’s central basin have areas of low dissolved oxygen. Weather conditions can determine if this low oxygen (hypoxic) water will be taken up by treatment plants, ...
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CHRP, Hypoxia, Stressor Impacts and Mitigation, Great Lakes, Ohio, Pennsylvania, U.S. States and Territories, Waterbodies, felix.martinez@noaa.gov

Mechanisms Controlling Hypoxia – Glider Applicatio...

We evaluated the use of gliders to improve Gulf of Mexico hypoxic zone monitoring. The efficacy of this technology was determined and we developed a comprehensive plan that integrates glider ...
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Hypoxia, Stressor Impacts and Mitigation, Gulf of Mexico, Waterbodies, david.hilmer@noaa.gov

Modeling Factors that Contribute to Harmful Algal ...

Harmful algal blooms that disrupt and degrade coastal aquatic ecosystems are occurring with greater frequency. We developed a model that shows these events are not only the result of nutrient ...
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Harmful Algal Bloom Detection and Forecasting, Hypoxia, Stressor Impacts and Mitigation, Gulf of Mexico, Waterbodies, wayne.litaker@noaa.gov

Modeling Hypoxia and Ecological Responses to Clima...

We are developing modeling tools that can be used to predict ecological responses to climate and nutrient input management in coastal systems. This project is part of NOAA’s Coastal Hypoxia ...
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CHRP, Climate Impacts on Ecosystems, Coastal Change, Hypoxia, Stressor Impacts and Mitigation, Chesapeake Bay, Delaware, Maryland, U.S. States and Territories, Waterbodies, alan.lewitus@noaa.gov

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 ...
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Biological Effects of Contaminants and Nutrients, Hypoxia, Stressor Impacts and Mitigation, Gulf of Mexico, Louisiana, Texas, U.S. States and Territories, Waterbodies, david.kidwell@noaa.gov

Modeling Ocean Acidification in the Coastal Zone

Adding carbon dioxide (CO2) to seawater raises the acidity of seawater, which can adversely affect marine life and fisheries. Coastal waters receive both atmospheric CO2 and CO2 from water pollution, ...
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Coastal Change, Hypoxia, Ocean Acidification, Stressor Impacts and Mitigation, Gulf of Mexico, Waterbodies, wayne.litaker@noaa.gov

National Estuarine Eutrophication Assessment: Upda...

Eutrophication is the overabundance of nutrients in a body of water that results in harmful algal blooms, fish kills, and in some cases ecosystem collapse. We used the Assessment of ...
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Hypoxia, Stressor Impacts and Mitigation, Atlantic Ocean, Chesapeake Bay, Gulf of Mexico, Pacific Ocean, Waterbodies, suzanne.bricker@noaa.gov

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 ...
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Hypoxia, Other Topics, Sponsored Research, Stressor Impacts and Mitigation, Gulf of Mexico, Louisiana, Texas, U.S. States and Territories, Waterbodies, david.scheurer@noaa.gov

Oyster Aquaculture Related Ecosystem Services in t...

Eutrophication—the overabundance of nutrients in a body of water—threatens the normal function and benefits provided by coastal ecosystems. Attempts to reverse eutrophication have focused on reducing land-based sources of nutrients ...
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Coastal Aquaculture Siting and Sustainability, Hypoxia, Marine Spatial Ecology, Stressor Impacts and Mitigation, Chesapeake Bay, Waterbodies, suzanne.bricker@noaa.gov

News

Modeling Shows Nitrogen Reductions Have Decreased ...

Management actions since the mid-1980s have reduced nutrient inputs to Chesapeake Bay, resulting in a smaller, annual “dead zone” — an area in the bay that lacks the oxygen needed ...
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Hypoxia, Stressor Impacts and Mitigation, Chesapeake Bay, Maryland, U.S. States and Territories, Virginia, Waterbodies, david.scheurer@noaa.gov

Reef-Building Coral Species Differ in Tolerance to...

NCCOS-supported researchers investigating the effects of hypoxia (low oxygen) on threatened coral species discovered that some species have surprisingly high tolerance to declining ocean oxygen levels. While investigating staghorn coral ...
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Climate Impacts on Ecosystems, Coastal Change, Funding, Hypoxia, Other Topics, Sponsored Research, Stressor Impacts and Mitigation, Florida, U.S. States and Territories, kimberly.puglise@noaa.gov

Gulf of Mexico Dead Zone Task Force Convenes to Di...

The Mississippi River Gulf of Mexico Watershed Nutrient Task Force, otherwise known as the Hypoxia Task Force (HTF), held a virtual fall meeting from December 13- 14, 2021. The Task ...
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HABHRCA, Hypoxia, Other Topics, Outreach, Stressor Impacts and Mitigation, Technology Transfer, Water Quality, Gulf of Mexico, Waterbodies, david.scheurer@noaa.gov, marykate.rogener@noaa.gov

NCCOS Partners with CERF ‘Rising Tides’- Contribut...

NCCOS sponsored and participated in the 2021 Coastal and Estuarine Research Federation (CERF) 26th Biennial Conference, which was held virtually on November 1-4 and November 8-11, 2021. NCCOS scientists and ...
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CHRP, Coastal Change, Harmful Algal Bloom Detection and Forecasting, Hypoxia, Natural and Nature-based Features, Ocean Acidification, Other Topics, Outreach, Sea Level Rise, Sponsored Research, Stressor Impacts and Mitigation, david.kidwell@noaa.gov

Climate Change Likely to Worsen Impact of Urban Ru...

The downtown Los Angeles skyline. Credit Wikimedia Commons. An NCCOS-funded study found that nutrient-laden, urban runoff is fueling algal blooms in Southern California's coastal waters that are acidifying the water ...
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CHRP, Coastal Change, Harmful Algal Bloom Detection and Forecasting, Hypoxia, Ocean Acidification, Other Topics, Sponsored Research, Stressor Impacts and Mitigation, California, Pacific Ocean, U.S. States and Territories, Waterbodies, kimberly.puglise@noaa.gov

Real-time Data Aids Managers in Timing Decisions o...

NCCOS-supported instruments in Los Peñasquitos Lagoon are providing real-time data to Southern California managers and regulators on key physical parameters (dissolved oxygen, salinity, and water level) enabling them to determine ...
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Hypoxia, Other Topics, Sponsored Research, Stressor Impacts and Mitigation, California, Pacific Ocean, U.S. States and Territories, Waterbodies, kimberly.puglise@noaa.gov

Lake Erie Eutrophication Exacerbated by Release of...

Lake Erie not only experiences eutrophication caused by runoff-laden phosphorus (P), but also by internal P loading caused by recycling of “legacy” P stored in bottom sediments. This phenomenon was ...
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Hypoxia, Other Topics, Sponsored Research, Stressor Impacts and Mitigation, Great Lakes, Ohio, U.S. States and Territories, Waterbodies, felix.martinez@noaa.gov

NOAA Ecological Forecast Helps Solve Mystery in La...

Residents of several northeast Ohio Lake Erie towns were surprised by a strong, foul smell during the first days of September. The residents, fearing a dangerous gas leak, called their ...
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CHRP, Hypoxia, Other Topics, Sponsored Research, Stressor Impacts and Mitigation, Great Lakes, Ohio, U.S. States and Territories, Waterbodies, felix.martinez@noaa.gov

Coral Bleaching May be Induced by Hypoxia

NCCOS-supported researchers found low oxygen (hypoxia) led to coral bleaching, mass coral mortality, and changes in the microbial community on a Caribbean coral reef. In 2017, hypoxia was detected on ...
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CHRP, Hypoxia, Other Topics, Sponsored Research, Stressor Impacts and Mitigation, Caribbean Sea, Foreign Countries, Waterbodies, kimberly.puglise@noaa.gov

Larger than Expected Summer ‘Dead Zone’ Measured i...

Map of measured Gulf hypoxia zone, July 25–31, 2021 (LUMCON/NOAA). Red area denotes 2 mg/L of oxygen or lower, the level which is considered hypoxic, at the bottom of the ...
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HABHRCA, Hypoxia, Stressor Impacts and Mitigation, Gulf of Mexico, Waterbodies, david.scheurer@noaa.gov

Products

Maps, Tools & Applications

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Data & Publications

Council Monitoring and Assessment Program (CMAP): Inventory of Existing Habitat and Water Quality Monitoring, and Mapping Metadata for the Gulf of Mexico Programs

Under the Resources and Ecosystem Sustainability, Tourist Opportunities, and Revived Economies of the Gulf Coast States Act of 2012 (RESTORE Act), the Gulf Coast Ecosystem Restoration Council (RESTORE Council or Council ) is required to report on the progress of ...
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Dynamics and distribution of natural and human-caused coastal hypoxia

Water masses can become undersaturated with oxygen when natural processes alone or in combination with anthropogenic processes produce enough organic carbon that is aerobically decomposed faster than the rate of oxygen re-aeration. The dominant natural processes usually involved are photosynthetic ...
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Ecosystem Metabolism

This chapter contains sections titled: Introduction; Basic Definitions and Concepts; Measuring Ecosystem Metabolism; Regulating Factors and Spatial/Temporal Patterns; Ecosystem Metabolism Case Studies; Cross?Ecosystem Comparisons; Metabolic Responses to Climate Change and Variability; Conclusions; Acknowledgments; References; Citing Literature ...
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Effect of Changes in Dissolved Oxygen Concentrations on the Spatial Dynamics of the Gulf Menhaden Fishery in the Northern Gulf of Mexico

Declines in dissolved oxygen (DO) concentrations in aquatic environments can lead to conditions of hypoxia (DO ? 2 mg/L), which can directly and indirectly affect aquatic organisms. Direct effects include changes in growth and mortality; indirect effects include changes in ...
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Effects of hypoxia exposure on hepatic cytochrome P450 1A (CYP1A) expression in Atlantic croaker: molecular mechanisms of CYP1A down-regulation

Hypoxia-inducible factor-? (HIF-?) and cytochrome P450 1A (CYP1A) are biomarkers of environmental exposure to hypoxia and organic xenobiotic chemicals that act through the aryl hydrocarbon receptor, respectively. Many aquatic environments heavily contaminated with organic chemicals, such as harbors, are also ...
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Effects of Nutrient Enrichment In the Nation’s Estuaries: A Decade of Change

The National Estuarine Eutrophication Assessment (NEEA) is a tool for evaluating both current eutrophic condition and the effectiveness of management actions aimed at reducing eutrophic condition. Eutrophication is caused by excess nutrients and is expressed by symptoms such as increased ...
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Effects of the Changjiang (Yangtze) River discharge on planktonic community respiration in the East China Sea

Planktonic communities tend to flourish on the western margins of the East China Sea (ECS) fueled by substrates delivered largely from the Changjiang River, the fifth largest river in the world. To study the effects of the Changjiang River discharge ...
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Effects of Winds on stratification and circulation in a partially mixed estuary

Numerical experiments are conducted to investigate how axial winds affect stratification and circulation in the partially mixed estuary of Chesapeake Bay. In the absence of rotational effects, stratification in the estuary decreases following both down?estuary and up?estuary winds, but stratification ...
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Erratum to: Synthesis in estuarine and coastal ecological research

A caveat in the concluding section of our paper states that it would be impossible to provide a comprehensive sample of synthesis case studies that reflects all the major research areas in estuarine and coastal science. In retrospect, however, we ...
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Eutrophication-Driven Deoxygenation in the Coastal Ocean

Human activities, especially increased nutrient loads that set in motion a cascading chain of events related to eutrophication, accelerate development of hypoxia (lower oxygen concentration) in many areas of the world’s coastal ocean. Climate changes and extreme weather events may ...
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General Pages

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NOAA Internship Opportunities

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