You are here: Home / News / Coastal Pollution / Archive by category "Hypoxia & Eutrophication"

News and Features by Research Area or Topic

Declining Oxygen Levels Threaten Oysters in Chesapeake Bay

NCCOS-sponsored research by the Smithsonian Institution Environmental Research Center (SERC) reveals low dissolved oxygen (hypoxia) hampers oysters’ ability to fight Dermo, a disease that has ravaged oysters throughout the Chesapeake Bay, resulting in up to two to three times more infected oysters than in waters with normal oxygen levels. Hypoxia is commonly studied on large geographic […]

Continue reading

NOAA, Partners Issue Dead Zone Predictions for Gulf of Mexico and Chesapeake Bay

Scientists are expecting an average, but still large, hypoxic or “dead zone” in the Gulf of Mexico this year, and a slightly above-average hypoxic zone in the Chesapeake Bay. NOAA-supported modeling is forecasting this year’s Gulf of Mexico hypoxic (very low oxygen) zone to cover an area ranging from 4,633 to 5,708 square miles (12,000 […]

Continue reading

Congress Reauthorizes National Harmful Algal Bloom and Hypoxia Legislation

On June 17, 2014, Congress passed a reauthorization of the Harmful Algal Bloom and Hypoxia Research and Control Act (HABHRCA)—legislation last reauthorized in 2004. HABHRCA is critical for protecting the public from these environmental events, as well as furthering NOAA’s goals to maintain healthy oceans and build resilient coastal communities and economies. In a roll call […]

Continue reading

Study Describes Social-ecological System of La Parguera, Puerto Rico

A new study describes the social-ecological system of La Parguera, Puerto Rico, and identifies the different pressures that have changed this system over the last 40 years. According to the report, multiple pressures have changed this ecosystem, including: sedimentation, nutrient enrichment, elevated seawater temperatures, and overfishing. La Parguera is a small fishing village on the […]

Continue reading

Study Informs Restoration of Michigan’s Saginaw Bay

A 2014 special issue of the Journal of Great Lakes Research details the findings of a five-year, NCCOS-funded project in Michigan’s Saginaw Bay designed to better inform bay restoration efforts. The special issue highlights research results from studies that address the bay’s various environmental stressors. Saginaw Bay in Lake Huron and its surrounding watershed support a […]

Continue reading

Gliders Map Gulf of Mexico Dead Zone

This summer, NCCOS-sponsored scientists from Texas A&M University will test the use of gliders to monitor and map hypoxia in the northern Gulf of Mexico. The team will deploy five autonomous underwater vehicle gliders and one autonomous surface vehicle over the Louisiana coastal shelf and associated offshore region, while also taking shipboard hypoxia (low dissolved […]

Continue reading

Monterey Bay National Marine Sanctuary Seeks Advice on Harmful Algal Bloom Threat

Five NOAA National Marine Sanctuaries on the west coast are vulnerable to harmful algal blooms, including blooms of Pseudo-nitzschia, which at times produce domoic acid—a potent neurotoxin that can accumulate in many animals. Consumption of toxic prey leads to illness and death in a variety of birds and marine mammals and necessitates shellfish harvesting closures […]

Continue reading

Scenario-based Ecosystem Forecast Models Help Mitigate Hypoxia

Representing NOAA at the Ninth National Monitoring Conference, NCCOS’s Dr. Alan Lewitus spoke at a session focused on nutrient monitoring and modeling to restore and protect coastal water quality. His presentation described how scenario-based ecosystem forecast models can generate nutrient reduction targets to achieve hypoxia mitigation goals. NCCOS administers national competitive programs that assess the […]

Continue reading