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News and Features by Region Louisiana Archives - News and Features

Why Nutrient-Enriched Waters Favor Large Single-Cell Algae

Ecological studies show that bottom-up (e.g., nutrient input) and top-down (e.g., grazing/predation) pressures may change the structure of aquatic ecosystems with “cascading” effects throughout the food chain. Recent research supports that zooplankton grazing in high-nutrient waters promotes the growth of larger phytoplankton over smaller species, creating a higher abundance of these larger single celled algae within the food web. Using samples […]

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NOAA and Louisiana Collaborate on Mississippi River Diversion Management

The 5th Annual NOAA/Northern Gulf Institute Gulf Hypoxia Research Coordination Workshop brought together Louisiana state officials, federal and other state agencies, NGOs, and academic scientists with interests in identifying a path forward to restore Louisiana’s coastal wetlands, reduce the size of the annual Gulf of Mexico hypoxic zone, and sustain the ecological and socioeconomic benefits of […]

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NCCOS Community Well-being Data Now Available

In August, an NCCOS collection of community well-being data for the Gulf of Mexico went live on NOAA’s Gulf Data Atlas. The Gulf of Mexico Coastal Community Well-being Data incorporates a variety of publicly available social, economic, and environmental quantitative data collected by federal, state, and local agencies. Data is available for the coastal states […]

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Gulf of Mexico Dead Zone Larger than Predicted After Heavy June Rains

Scientists supported by NOAA NCCOS, EPA and the Gulf of Mexico Research Initiative have mapped the size of the 2015 Gulf of Mexico low-oxygen dead zone. The areal extent of hypoxia measures approximately 6,474 square miles, about the size of Connecticut and Massachusetts combined, exceeding the prediction from June. Nutrient run off from agricultural and other human […]

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Persistent Organic Pollutants Unlikely Cause of Dolphin Health Issues after Deepwater Horizon

NCCOS scientists reported that persistent organic pollutants (POPs) were likely not a contributing factor to the poor health conditions and increased mortality observed in some populations of bottlenose dolphins following the Deepwater Horizon (DWH) oil spill.  This study, recently published in the journal Science of the Total Environment, analyzed 169 remote biopsy samples that were […]

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Gulf of Mexico Offshore Dead Zone Linked to Mississippi River Nutrient Inputs

Twenty-five years of NCCOS sponsored research shows that the offshore summer hypoxic (low-oxygen) “dead zone” in the Gulf of Mexico is strongly linked to nutrient loading from the Mississippi River. Physical forces (i.e., wind, waves, currents, temperature) play an equally strong role as biological variables (i.e., phytoplankton growth/decay, photosynthesis/respiration) in creating and maintaining Louisiana shelf hypoxia […]

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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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Workshop Explores Fisheries Management in Face of Mississippi River Diversions and Hypoxia

Last month’s Fifth Annual Gulf of Mexico Hypoxia Research Coordination Workshop continued its tradition of advancing the science that informs fisheries and resource managers about the effects of Gulf hypoxia (low dissolved oxygen). The workshop also provided a forum to assess and predict the potential ecological and socioeconomic effects of Mississippi River diversions. Large-scale ecosystem […]

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