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The Watershed Management Optimization Support Tool (WMOST) is a decision support tool that evaluates the relative cost-effectiveness of management practices at the local or watershed scale. WMOST models the environmental effects and costs of management decisions in a watershed c...

Multiple drivers, including nutrient loading and climate change, affect the Narragansett Bay ecosystem in Rhode Island/Massachusetts, USA. Managers are interested in understanding the timing and magnitude of these effects, and ecosystem responses to restoration actions. To provid...

This report highlights significant projects that the ETSC has supported throughout fiscal year 2014. Projects have addressed an array of environmental scenarios, including but not limited to remote mining contamination, expansive landfill waste, sediment remediation by capping, ...

Hydrologic classification systems can provide a basis for broadscale assessments of the hydrologic functions of landscapes and watersheds and their responses to stressors such as climate change. One of the greatest challenges to this effort is obtaining consistent aquifer permea...

Arctic cod play an important role in the Arctic trophic hierarchy as the consumer of primary productivity and a food source for many marine fish and mammals. Shifts in their distribution and abundance could have cascading affects in the marine environment. This paper investigates...

The underlying philosophy of Unmix is to let the data speak for itself. Unmix seeks to solve the general mixture problem where the data are assumed to be a linear combination of an unknown number of sources of unknown composition, which contribute an unknown amount to each sample...

BASE (Basin-Scale Assessments for Sustainable Ecosystems) is a research program developed by the Ecosystems Research Division of the National Exposure Research Laboratory to explore and formulate approaches for assessing the sustainability of ecological resources within watershed...

Mathematical models for predicting the transport and fate of pollutants in the environment require reactivity parameter values--that is, the physical and chemical constants that govern reactivity. Although empirical structure-activity relationships that allow estimation of some ...

Land surface hydrology controls runoff production and the associated transport of sediments, and a wide variety of anthropogenic organic chemicals, and nutrients from upland landscape areas and hillslopes to streams and other water bodies. Based on interactions between landscape ...

Recent studies have indicated that solar radiation can be a significant stressor of coral assemblages in tropical and subtropical marine environments. Here we review the scientific literature related to the interactions of solar radiation with coral reefs, with emphasis on harm...

The computer program SPARC (SPARC Performs Automated Reasoning in Chemistry) has been under development for several years to estimate physical properties and chemical reactivity parameters of organic compounds strictly from molecular structure. SPARC uses computational algorithms...

On July 19, 2010, the President signed an Executive Order establishing the nation’s first comprehensive National Policy for the Stewardship of the Ocean, Our Coasts, and Great Lakes and adopted the Final Recommendations of the Ocean Policy Task Force (OPTF 2010). The Final Recom...

Coral reefs are declining at unprecedented rates worldwide due to multiple interactive stressors including climate change and land-based sources of pollution. The Clean Water Act (CWA) can be a powerful legal instrument for protecting water resources, including the biological inh...

Using historic air photos and U.S. Coast Survey maps, historic vegetation changes were identified. Using surveys of vegetation and elevation, we measure elevation of Narrow River salt marshes, and compare it with other salt marshes in Rhode Island and neighboring states. Water ...

Over the last 60 years, the Chesapeake Bay water quality and seagrass beds have diminished to the point that the system is less able to support abundant crabs and diverse fish, feed waterfowl, and produce safe recreational opportunities. Further, the long-term resilience of the B...

Global climate change affects the fundamental drivers of the hydrological cycle. Evidence is growing that climate change will have significant ramifications for the nation&rsquo;s freshwater ecosystems, as deviations in atmospheric temperature and precipitation patterns are more ...

In this report, the dataset collected by Wootton at Tatoosh Island during 2000 through 2010 is analyzed to assess whether the apparent rapid decline in the pH data can be explained by other more localized processes. Specifically, we focused on the role of river discharge on pH l...

There are about 350 estuaries along the U.S. Pacific Coast. Basic descriptive data for these estuaries, such as their size and watershed area, are important for coastal-scale research and conservation planning. However, this information is spread among many sources and can be dif...

As part of a larger investigation into potential impacts of climate change on estuarine habitats in the Pacific Northwest (PNW), we estimated changes in freshwater inputs into four estuaries. These were the Coquille River estuary, the South Slough of Coos Bay, and the Yaquina Bay...

EPA has released for public comment a draft report entitled, <i>A Review of the Impact of Climate Variability and Change on Aeroallergens and their Associated Effects</i>. This draft report is a survey of the current state of scientific knowledge of the potential impacts of clim...

<p>This report was prepared by the Global Change Research Program (GCRP) in the National Center for Environmental Assessment (NCEA) of the Office of Research and Development (ORD) at the U.S. Environmental Protection Agency (EPA). It is intended for managers and scientists worki...

The Environmental Protection Agency submits the U.S. greenhouse gas inventory as an annual reporting requirement under UNFCCC, which the United States and other developed countries signed June 1992 at the Rio Earth Summit. The EPA has submitted the greenhouse gas inventory to the...

The condition of South Florida reefs was assessed to determine the prevalence of coral diseases. Ten surveys were conducted from 1997 until 2004 in the Florida Keys National Marine Sanctuary, Biscayne National Park, New Grounds, Dry Tortugas National Park, and Tortugas Ecologica...

This project is comprised of a series of activities – listening sessions, literature reviews, and an expert elicitation research agenda-setting workshop – designed to examine and characterize the vulnerability of older adults to climate change and opportunities for adaptation. ...

The 2011 National Wetland Condition Assessment (NWCA) is the first-ever national assessment of wetland condition and the fifth in a series of National Aquatic Resource Surveys (NARS), after streams, rivers, lakes, and coastal systems. The NWCA was implemented by the U.S. Environ...