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Projects

Life and Death of a Karenia Bloom in the Western G...

Harmful algal blooms (HABs) are increasing in frequency and pose a threat to human and environmental health. Blooms of Karenia brevis occur nearly annually along the Florida coast which has ...
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Living with Sea Level Rise in the Texas Coastal Be...

We are using modeling to identify the best locations along the Texas Coastal Bend where natural and nature-based features (NNBF) can be used to address the effects of sea level ...
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Measuring the Human Dimensions of Coastal Ecosyste...

We are using social science to better understand the linkages between coastal ecosystems and human health and well-being, with the aim of providing information to managers responsible for natural resources, ...
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Mechanism of Harmful Algal Bloom Initiation in the...

Blooms of the toxic dinoflagellate, Karenia brevis, threaten human and ecosystem health and local economies around the Gulf of Mexico. Although the blooms mostly prevail on the west coast of ...
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Mechanisms Controlling Hypoxia – Integrated Causal...

We’re examining the complex physical and biogeochemical relations that control and maintain the low-oxygen dead zone in the northern Gulf of Mexico (nGOM). We are combining field data from moored ...
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Mercury Hot Spots and Bioaccumulation in Fish

We identify which species of fish and which harvest locations expose consumers the most to potentially toxic mercury. With this information, we seek to develop the ability to predict which ...
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Metabolism and Physiology of Red Tide Toxins in Tu...

Endangered sea turtles experience severe mortality during Florida red tides. This project uses non-endangered freshwater turtles as a model animal to determine the effects of Florida red tide on endangered ...
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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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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 ...
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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 ...
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News

NOAA, USGS Identify Programs for Environmental Mon...

Cover of the 2019 report, Inventory of Existing Habitat and Water Quality Monitoring, and Mapping Metadata for Gulf of Mexico Programs. Credit NOAA and USGS. In a report published this ...
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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 ...
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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 ...
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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 ...
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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 ...
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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, ...
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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, ...
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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 ...
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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, ...
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Data & Publications

Evidence of climate-driven ecosystem reorganization in the Gulf of Mexico

The Gulf of Mexico is one of the most ecologically and economically valuable marine ecosystems in the world and is affected by a variety of natural and anthropogenic phenomena including climate, hurricanes, coastal development, agricultural runoff, oil spills, and fishing ...
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Exceptionally high organic nitrogen concentrations in a semi-arid South Texas estuary susceptible to brown tide blooms

Studies of estuarine eutrophication have tended to focus on systems with continually flowing rivers, while little is known about estuaries from semi-arid/arid regions. Here we report results from an assessment of water quality conditions in Baffin Bay, Texas, a shallow ...
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Exploring estuarine eutrophication sensitivity to nutrient loading

The sensitivity of surface chlorophyll (Chl) and bottom water dissolved oxygen (DO) to total nitrogen (TN) load was investigated using a Bayesian?based process model fit to data from a range of estuaries. The model was used to test if the ...
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Extensive reproductive disruption, ovarian masculinization and aromatase suppression in Atlantic croaker in the northern Gulf of Mexico hypoxic zone

The long-term impacts on marine ecosystems of the recent dramatic worldwide increase in the incidence of coastal hypoxia are unknown. Here, we show widespread reproductive disruption in Atlantic croakers collected from hypoxic sites approximately 120 km apart in the extensive ...
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Gambierdiscus species exhibit different epiphytic behaviors toward a variety of macroalgal hosts

Ciguatera fish poisoning is a common form of seafood poisoning caused by toxins (ciguatoxins) that accumulate in demersal (reef) food webs. The precursors of ciguatoxins are produced by dinoflagellates of the genus Gambierdiscus, and enter the food web via herbivory ...
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Gauging the Social Values of Ecosystem Services in the Mission-Aransas National Estuarine Research Reserve

This report presents the findings of a survey initiative conducted to gauge the social values of ecosystem services of the visitors, seasonal residents, and permanent residents of the Mission-Aransas National Estuarine Research Reserve (Reserve). In order to gauge the perceived ...
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Historical trends of hypoxia in Changjiang River estuary: Applications of chemical biomarkers and microfossils

Over the past two decades China has become the largest global consumer of fertilizers, which has enhanced river nutrient fluxes and caused eutrophication and hypoxia in the Yangtze (Changjiang) large river delta-front estuary (LDE). In this study, we utilized plant ...
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Identifying Bloom Origins of the Toxic Dinoflagellate Karenia brevis in the Western Gulf of Mexico Using a Spatially Explicit Individual-Based Model

Harmful algal blooms caused by Karenia brevis result in large fish kills, human respiratory irritation, and shellfishing closures in affected areas. Most previous work on bloom formation in the Gulf of Mexico has focused on the west coast of Florida ...
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Influence of Major Storm Events on the Quantity and Composition of Particulate Organic Matter and the Phytoplankton Community in a Subtropical Estuary, Texas

Variations in the freshwater inflow regimes of estuaries due to perturbations, such as storm events, alter the source, and composition of particulate organic matter (POM) and the phytoplankton community which are key links in estuarine carbon and nitrogen cycling. To ...
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Inorganic nitrogen release from sediment slurry of riverine and estuarine ecosystems located at different river regimes

The rationale of present study was to compare nature of dissolved inorganic nitrogen (DIN = NH4+ and NO2+3) release from aerobic sediment slurry at two different hydrologic flow regimes. The watershed of the Guadalupe River/Estuary system receives more freshwater inflow ...
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