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Low Oxygen Conditions Increase Parasite Infections in Oysters

A study funded in part by NCCOS has found that diel-cycling hypoxia—daily cycling of high to very low oxygen levels—in shallow coastal waters increases parasite infections in eastern oysters (Crassostrea virginica). The project team tested and confirmed that diel-cycling hypoxia increases eastern oyster susceptibility to Perkinsus marinus infection, most likely by reducing the oxygen carrying capacity […]

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Measuring Parasites and Disease in U.S. Oysters and Mussels

NOAA today released its first-ever long term report of the national distribution of parasites and disease in mussels and oysters, concluding that there was no general threat to oyster and mussel population in the nation’s coastal waters at the time of the study, despite some locations along the Gulf of Mexico and West Coast with […]

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Primary Cause of Dead Zones is Biological on Pacific Northwest Continental Shelves

Coastal waters of the northern portion of the California Current System experience a seasonal decline in oxygen concentrations and increasing hypoxia (dead zones) over the summer upwelling season resulting in negative impacts to many organisms. NCCOS-sponsored research modelling determined that plankton respiration was the leading influence on seasonal and interannual fluctuations in oxygen concentration and hypoxia in the […]

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Reducing the Gulf of Mexico Dead Zone Using Operational Hypoxia Scenario Models

A recently released white paper assesses the status of several empirical and deterministic models capable of characterizing Gulf hypoxia, also known as the Gulf dead zone. “Modeling Approaches for Scenario Forecasts for Gulf of Mexico Hypoxia” presents conclusions from the 2013 joint NOAA and Northern Gulf Institute Forum for the Gulf of Mexico Research and Coordination […]

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Pulley Ridge Corals Show Potential Signs of Recovery After 10-Year Decline

An NCCOS-funded study has produced a detailed characterization of the deep (60–80 meters), mesophotic reefs and fish populations of Pulley Ridge, located off the southwest coast of Florida. While the study shows a decade-long decrease in coral cover at Pulley Ridge, when compared with data collected by the U.S. Geological Survey in 2003, the findings […]

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Invasive Lionfish Web Portal Supports Community Management and Education

The newly released Invasive Lionfish Web Portal, developed by the Gulf and Caribbean Fisheries Institute in partnership with NOAA, supports the managment and control of lionfish in conservation areas along the Southeast coast of the U.S. and Caribbean. The invasive lionfish now threatens reef communities from North Carolina to South America with extreme impacts to […]

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NOAA Estimates Nitrogen Removal Rates from Shellfish Farms around the World

Excessive nutrient input into estuarine and coastal environments, also known as eutrophication, can lead to algal blooms, oxygen depletion, fish kills, and a general loss of key habitats. New research from NOAA supports using shellfish aquaculture for nutrient removal and eutrophication reduction. To include shellfish aquaculture as part of a comprehensive approach to nutrient management, scientists measured […]

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Hypoxia Task Force Makes Progress to Reduce Runoff Fueling Gulf of Mexico Dead Zone

The Mississippi River Gulf of Mexico Watershed Nutrient Task Force (“Hypoxia Task Force”) works to reduce and control hypoxia, or the dead zone, in the Gulf of Mexico. At the Fall Public Meeting in Alton, Illinois, the Task Force reported recent progress in dead zone reduction. New measures and actions were passed to control  nutrient runoff which […]

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