Science Inventory

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Hydrologic and water-quality data were collected during October 2009 - January 2011 to characterize nutrient and bacteria concentrations in stormwater runoff from agricultural fields that receive wastewater originating at a swine facility at North CarolinaState University's Lake ...

Inputs of detritus have been shown to be strong drivers of container mosquito production and life history traits, including for species that are of medical importance. During 2016, Zika infection swelled throughout the Caribbean and South and Central America, a disease vectored p...

Evaluating environmental conditions at community, watershed, regional, and national scales is a growing interest among Federal agencies, states, and the public. At the same time, the relatively high cost of collecting environmental data has limited the implementation of regional...

Assessment of our nation's waters, as per sections 305(b) and 303(d) of the Clean Water Act, indicates that approximately 40% are impacted by chemical and non-chemical stressors that impair designated beneficial uses and ecological habitat. Excess nutrients are often listed as a ...

Synthesis of existing research on nutrient (i.e., nitrogen and phosphorus) stressor-response relationships can provide scientific evidence for environmental decision makers charged with protecting and managing ecosystem integrity through the tools provided by the Clean Water Act,...

There is high potential that the body of work and data being conducted and used by this workgroup will become guidance under the Great Lakes Water Quality Agreement

Excess nutrients in the environment have led to deleterious water quality effects, including widespread freshwater and marine eutrophication and harmful algal blooms. Decades of research suggest the potential for individual wetlands to remove nutrients (e.g., nitrogen and phospho...

Excess nutrients and pesticides in the environment can cause a variety of ecological and human-health effects. When nutrients are unused by plants, or pesticides remain after use on their intended target, these compounds can be transported to streams, either directly through over...

Salmon carcass addition to streams is expected to increase stream productivity at multiple trophic levels. This study examined stream nutrient (nitrogen, phosphorus, and carbon), epilithic biofilm (ash-free dry mass and chlorophyll a), leaf-litter decomposition, and macroinverte...

The unique physical and chemical properties of biochars make them promising materials for odor, gas, and nutrient sorption. Floating covers made from organic materials (biocovers) are one option for reducing odor and gas emissions from livestock manure lagoons. This study evaluat...

Hydrologic modifications in urban ecosystems impact water quality via soil compaction, impervious surface cover, drainage, and channelization.  Urban stream restoration strategies that are designed to regain lost ecosystem function such as nutrient uptake may have unintended...

The National Water-Quality Assessment (NAWQA) Program is designed to describe the status and trends in the quality of the Nations ground- and surface-water resources and to provide a sound understanding of the natural and human factors that affect the quality of these resources. ...

Poster for the EPA Science Forum.<br><br>This collaborative research effort assessed how changing coastal plain watershed land-uses influence the delivery of nutrients and sediments to estuaries and subsequently how estauries respond to increasing loads of pollutants. <br><br>

This is a blog post for EPA's public Blog, It All Starts with Science.

Wildfire activity is increasing and can be linked to climate change effects, including rising global temperatures and more frequent drought conditions. Wildfire emissions impact human health and sensitive ecosystems, particularly in the western United States where large fire freq...

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 (i.e., watersheds, lakes, or streams) that are now nutrient deficient becau...

Nutrients are important players in the degradation of waterbodies because they are often the elements that limit primary productivity and, hence, are the key factors controlling eutrophication. Eutrophication causes unsightly algal blooms leading to oxygen depletion, stress on o...

As part of a larger study of demographic change in coastal Ghana, we measured the concentrations of major plant nutrients and phytoplankton chlorophyll in eight coastal lagoons with different land use and human population density. The purpose of our study was to relate human acti...

The Landscape Indicators for Pesticides Study in Mid-Atlantic Coastal Streams (LIPS-MACS) is a collaborative research effort between the U.S. Environmental Protection Agency's Office of Research and Development and the U.S. Geological Survey's National Water Quality Assessment Pr...

Hydrologic modifications in urban ecosystems impact water quality via soil compaction, impervious surface cover, drainage, and channelization. Urban stream restoration strategies that are designed to regain lost ecosystem function such as nutrient uptake may have unintended cons...

Successful bioremediation of oil-contaminated beaches requires maintenance of a sufficient quantity of growth-limiting nutrients in contact with the oiled beach materials. A conservative tracer study was conducted on a moderate-energy, sandy beach on Delaware Bay to estimate the...

Wildfire activity is increasing and linked to climate change effects including rising global temperatures and more frequent drought conditions. Wildfire emissions likely impact human health and sensitive ecosystems, particularly in the western United States where fire frequency a...

Changes in phosphorus and nitrogen concentrations in streams are usually associated with changes in other environmental factors, and this phenomenon complicates efforts to understand the effects of nutrients on stream biological assemblages. Controlled experimental manipulations ...

Stream water nutrients were measured in the Siletz River, Oregon, with the goal of comparing dissolved nutrient concentrations, primarily the nitrogenous nutrients nitrate and ammonium, with previously collected data for the Yaquina and Alsea Rivers for the nutrient criteria prog...

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...