Science Inventory

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This presentation presents an overview of select SSWR research from StRAP3 addressing nutrients, HABs, and hypoxia. Research includes presentation of national watershed nutrient inventories, freshwater phytoplankton qPCR, legacy nutrients, estuarine nutrient resilience and recove...

Many benthic indices have been created in the last two decades for monitoring coastal ecosystems, however direct comparisons between indices are often difficult. To address this, M-AMBIUS has replaced regional indices used by the US Environmental Protection Agency. Objectives of ...

We modeled nutrient management practices including residue management, cover crops, filter strips, grassed waterways, constructed wetlands, and reducing fertilizer in the upper East Fork of the Little Miami River, an 892 km2 watershed in southwestern Ohio, USA. The watershed is 6...

The hypoxic zone on the Louisiana Continental Shelf (LCS) forms each summer due to nutrient enhanced primary production and seasonal stratification associated with freshwater discharges from the Mississippi/Atchafalaya River Basin (MARB). Recent field studies have identified high...

This presentation is designed for a classroom setting of undergraduate students to highlight application of water quality models, with an emphasis on the challenges of implementing, calibrating, and evaluating model results.

Hypoxia, or low dissolved oxygen (DO) is a common outcome of excess nitrogen and phosphorus delivered to coastal waterbodies. Shallow and highly productive estuaries are particularly susceptible to diel-cycling hypoxia, which can exhibit DO excursions between anoxia (DO ≤1&nbs...

•       An updated version (2) of EPA’s River Basin Export Reduction Optimization Support Tool (RBEROST) has been developed to provide nutrient management strategies for the Puget Sound Basin.  RBEROST is an R-based tool that sets up ...

The U.S. Harmful Algal Bloom and Hypoxia Research Control Act calls for robust approaches to forecasting cyanobacterial harmful algal blooms (cyanoHABs). Accurate forecasting technology could save local communities healthcare costs through the early detection of cyanoHABs and the...

In the northern Gulf of Mexico, nutrients from upstream agricultural fertilization and river runoff are delivered to the Louisiana Continental Shelf (LCS) via the Mississippi-Atchafalaya river basin. This increased nutrient loading stimulates a phytoplankton bloom; as the resulti...

In this work, we assess the techno-economic and social performance of preventing and controlling phosphorus releases from municipal wastewater effluents in local communities. This multicriteria assessment framework accounts for the effects of the economies of scale and the popula...

The seasonal occurrence of deep-water hypoxia in western Long Island Sound (LIS) has been documented for decades by water quality cruise surveys and fixed mooring buoys. While previous studies have focused on factors modulating bottom dissolved oxygen (DO) at subtidal timescales,...

Seasonal hypoxia, or low dissolved oxygen, in Long Island Sound (LIS) has declined since the early 2000s due to management actions that reduced point source nitrogen loading. To further quantify and better understand drivers of changes in the spatial and temporal distribution dis...

Nitrogen management in Long Island Sound (LIS) has reduced N loading and the extent of hypoxia over the last 2 decades. To support communication around successful remediation of hypoxia and the remaining challenges of N management, we are analyzing 30 years of water quality data ...

The use of in vitro systems to model inhalation exposures has focused on using primary cells as they can recapitulate key features of the airway epithelium in vivo.  For inhaled chemicals, achieving this goal has relied on using differentiated primary human bronchial epithel...

Excess nutrients (nitrogen and phosphorus) in lakes can lead to eutrophication, hypoxia, and algal blooms that may harm aquatic life and people.  Some U.S. states have established numeric water quality criteria for nutrients to protect surface waters.  However...

Phosphorus causes nutrient pollution in lentic water systems, which act as a reservoir of phosphorus since it is stored within the sediments of these waterbodies. The effects of phosphorus pollution include harmful algal bloom events, hypoxia of waterbodies, and impairment of dri...

Benthic rapid assessment tools are needed to close the gap between sample collection and analysis so managers can better evaluate ecological response to management actions and environmental conditions. Sediment profile imaging (SPI) captures the top centimeters of sediment in cro...

Wetland restoration and construction are important land management options for retaining nitrogen and phosphorus and thereby improving water quality at local scales (i.e., at nearby streams). However, limited information exists regarding the cumulative influence of wetlands outsi...

Anthropogenic disturbances have increased the frequency, area, and intensity of eutrophic events in coastal ecosystems, harming seagrass and macrofauna. The Pawcatuck River and Little Narragansett Bay (CT/RI) is a small, shallow estuary with zones of hypoxia due to algal growth. ...

Anthropogenic nutrient loading has resulted in eutrophication and habitat degradation within estuaries. Study of eutrophication in estuaries has often focused on larger systems, while there has been increasing interest in understanding the governing processes in smaller systems. ...

Hypoxia, or low dissolved oxygen (DO), is a widespread water quality problem affecting estuaries and coastal waters around the world. Water quality criteria for DO have been established for every estuary in the US and are an important part of the regulatory response to nutrient p...

Cyanobacterial harmful algal blooms (CyanoHABs) produce excessive amounts of cyanotoxins, mainly microcystins (MCs) and anatoxins (ATXs), significantly threatening aquatic ecosystems and public health. Accurately predicting CyanoHABs is essential to develop effective CyanoHAB pre...

The Pawcatuck River Estuary (PRE), composed of the Pawcatuck River and Little Narragansett Bay (CT/RI, USA), is a coastal plain estuary subject to environmental stress. Anthropogenic nutrient loading, watershed land-use changes, and urbanization have contributed to eutrophication...

If a water body in the United States is not as healthy as we’ve decided it should be, the most likely cause is nutrient pollution <span style='mso-element:field-begin'><span style='mso-spacerun:yes'> ADDIN EN.CITE <EndNote><Cite><Author>US...

 Increased nutrient loading to coastal ecosystems has fueled a series of intertwined water quality processes that leads to low dissolved oxygen (DO) or hypoxia (DO ≤ 2 mg L-1) and reduced pH, which is also known as nutrient enhanced acidification. While the cumulative imp...