Science Inventory

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While increased anthropogenic nutrient loading of coastal ecosystems is a growing ecological and economic problem both in the U.S. and globally, the extent of such excess nutrient loading in Pacific Northwest estuaries is poorly known. To help determine the vulnerability of Pacif...

Export of dissolved organic carbon from lakes and streams has increased throughout Europe and North America over the past several decades. One possible cause is altered deposition chemistry; specifically, decreasing sulfate inputs leading to changes in ionic strength and dissolve...

Factors affecting anaerobic biodegradation kinetics of canola oil in freshwater sediments were investigated. An optimum dose of ferric hydroxide (10.5 g Fe(III)·kg<SUP>-1</SUP> sediment) was found to stimulate anaerobic biodegradation of canola oil (18.6 g oil kg<SUP>-1</SUP>). ...

Eutrophication&nbsp;remains a threat to coastal habitats and water quality worldwide. The U. S. Clean Water Act resulted in reductions of nutrient loading from point sources but management of&nbsp;nonpoint sources&nbsp;(NPS) of nutrients remains challenging despite efforts over a...

Abstract for presentation at Gulf of Mexico Alliance Implementation Workshop August, 2010

Update on SSWR Nutrients and HABs research for Region 5 States meeting. This presentation covers research that addresses nutrient pollution and&nbsp; HABs forecasting. Where possible, we have highlighted nutrient reduction related to nonpoint sources including agriculture and sep...

Nearshore nutrient impressions were largely limited to observations of local spatial trends from a few site-specific studies and some temporal trends at a set of Canadian water intake locations (later summarized in Nicholls et al. 1999). Lacking a systematic information base fo...

Laboratory studies were conducted to determine the fate of fertilizers proposed for application to the Alaska shoreline in support of the Alaskan Oil Spill EPA Bioremediation Project. ertilizer application is theorized to prove indigenous organisms with nutrients that appear to b...

The December 1-2, 2021 BOSC review is focused on the SSWR Nutrients and Harmful Algal Blooms (HABs) Topic, one of the three inter-related topics in the SSWR research portfolio. The Nutrients and HABs Topic consists of three Research Areas (RA): RA4 &ndash; Assessment and Manageme...

The application of nutrients to assist and accelerate naturally occurring biodegradation processes was studied at field scale on contaminated shoreline in Prince William Sound as part of the effort to recover from the Exxon Valdez oil spill. election of fertilizer forms and means...

There is a growing need for cost effective ways to assess conditions of and risks to ecological resources at a variety of scales over broad regions. Indicators, models and assessment tools are needed to evaluate water bodies at risk to non-point source pollution and to be able t...

This is a requested presentation from the Upper Mississippi River Basin Water Quality Task force on EPA ORD's nutrients and harmful algal bloom research in the Mississippi River Basin and Region 7. The presentation covers several research projects related to predicting harmful al...

One scheme to help restore salmon to the Pacific Northwest is the addition of nutrients (i.e., raw or processed salmon carcasses, and commercially produced organic or inorganic fertilizers) to headwaters (e.g., watersheds, lakes, or streams) that are now nutrient deficient becau...

This is a presentation that describes the ORD Nutrients Solutions-Driven Research Pilot.&nbsp; The presentation focuses on partnerships, engagement, co-development of research, and a suite of nutrient interventions to be evaluated in a social and environmental context.&nbsp; The ...

This poster summarizes the nutrients and HABs research topic under EPA's Safe and Sustainable Water Research Program Strategic Research Action Plan. This research topic will comprehensively address nutrient issues and one of the primary impacts of excess nutrients in water bodies...

Nutrient related causes of stress in aquatic ecosystems.

Management plans for the Mississippi River Basin call for reductions in nutrient concentrations up to 40% or more to reduce hypoxia in the Gulf of Mexico (GOM), while at the same time the government is considering new farm subsidies to promote development of biofuels from corn. T...

Nutrient (nitrogen and phosphorus) pollution is a water quality issue in the US, including within the southeastern states that comprise US EPA Region 4. Biotic condition of southeastern streams with respect to nutrients has been evaluated using biological indicators based on mac...

Pacific Northwest estuaries are characterized by large tidal ranges (2-3 m) that routinely expose submerged aquatic vegetation (SAV) such as seagrass and benthic macroalgae. The dominant native seagrass in PNW estuaries is the eelgrass Zostera marina. However, in recent decades...

Regenerative stormwater conveyance (RSC), a relatively new stormwater management approach, is extensively implemented throughout the mid-Atlantic for nutrient control, but little is known of its pollutant reduction capabilities and controlling factors. This study examined effects...

Arsenic (As) contamination of rice grains and the generally low concentration of micronutrients in rice have been recognized as a major concern for human health. Here, we investigated the speciation and localization of As and the distribution of (micro)nutrients in rice grains b...

Research on nutrient delivery to Pacific Northwest streams generally focuses on watershed processes and land use, but anadromous fish also can serve as a significant source of nutrients and energy to the streams where they return and die. To understand the relative importance of...

This research plan for the Landscape Indicators for Pesticides Study ? Mid-Atlantic Coastal Streams (LIPS-MACS) describes the rational and approach of developing a research project to evaluate statistical landscape indicator models for freshwater streams in the Mid-Atlantic Coas...

Buddleja davidii (Family: Buddlejaceae), an aggressive, highly invasive, ornamental<br><br>shrub of Asian origin, may be suppressing slower-growing native species (e.g., Griselinia<br><br>littoralis; Family: Griseliniaceae) on New Zealand floodplains, thus altering successional<b...

Nutrient demand and availability is a major driver of ecosystem processes. We examined the impact of freshwater mussels, a highly imperiled faunal group, on nitrogen (N) and phosphorus (P) cycling and storage in three Oklahoma streams. We found that filter-feeding by freshwater m...