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As the world's reservoirs experience drawdowns from reduced precipitation and increased water demand, expanses of sediment are being exposed and colonized by both native and non-native vegetation. Within Lake Powell, the second largest reservoir in the U.S., drought in the Colora...

South Florida is a subtropical environment with diverse ecological and human communities that rely on a complex water system undergoing the costliest restoration in U.S. history. Pesticide and metal input to the aquatic systems of South Florida can impact the capabilities of main...

The Regional Monitoring Networks (RMNs) are a collaborative, volunteer effort to collect comparable long-term monitoring data at targeted sites nationwide to detect changes over time. Six Northeast states have participated in the stream RMN since it was first piloted in the North...

The global nitrogen science-policy community lacks a holistic framework for assessing nitrogen (N) impacts on food production, ecosystems, health, and climate. This results in reduced effectiveness and societal welfare benefits in addressing N challenges and creates the potential...

Per- and polyfluoroalkyl substances (PFAS) are a diverse class of persistent contaminants associated with a variety of adverse effects and found in aquatic ecosystems worldwide. There is an urgent need for data to assess the ecological risk from the universe of PFAS. Therefore, w...

Wildland fire is a major global driver in the exchange of aerosols between terrestrial environments and the atmosphere. This exchange is commonly quantified using emission factors or the mass of a pollutant emitted per mass of fuel burned. However, emission factors for microbes a...

Agricultural soils are increasingly undergoing inadvertent and purposeful exposures to engineered CeO2 nanoparticles (NPs), which can impact crops and root-associated microbial communities. However, interactions between NP concentration and exposure duration on plant-mediate...

In urban systems, a wide variety of processes, including increasing impervious surface cover, road salt application, sewage leaks, and weathering of the built environment, contribute to novel chemical cocktails that are comprised of metals, salts, nutrients, and organic matter. D...

In urban systems, a wide variety of processes, including increasing impervious surface cover, road salt application, sewage leaks, and weathering of the built environment, contribute to novel chemical cocktails that are made up of metals, salts, nutrients, and organic matter. Due...

Climate change is projected to impact river, lake, and wetland hydrology, with global implications for the condition and productivity of aquatic ecosystems. We integrated Sentinel-1 and Sentinel-2 based algorithms to track monthly surface water extent (2017–2021) for 32 sit...

Climate change and it's impact on watersheds and water quality is an primary concern of resource managers at the regional, state, and federal level. This presentation provides a high-level overview of EPA water quality modeling projects and tools in the context of climate change....

This is the public informational webinar presentation for the request for applications (RFA) EPA-G2024-STAR-C1 titled "Coastal Ecosystems Climate Resilience".

Wild pigs are an invasive species found globally that pose significant economic impact and a serious risk to local ecosystems, agriculture, and public health. Fecal contamination of water is one of these public health concerns as wild pigs have been shown to carry pathogenic ente...

Seagrass beds play a critical role in biodiversity maintenance, serving as nursery habitats for fisheries, and aiding in carbon and sediment sequestration in the ecosystem. These habitats receive dissolved and particulate material inputs, like nutrients and heavy metals, aff...

EPA’s Office of Research and Development (ORD) is partnering with a community in the Chesapeake Bay region, Crisfield, Maryland, to co-develop research addressing climate-related flooding and erosion issues incorporating natural infrastructure comprised of coastal resources...

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...

With increasing concerns about freshwater cyanobacteria blooms, there is a need to identify which waterbodies are at risk for developing these blooms, especially those that produce cyanotoxins. To address this concern, we developed spatial statistical models using the US National...

With increasing concerns about freshwater cyanobacteria blooms, there is a need to identify which waterbodies are at risk for developing these blooms, especially those that produce cyanotoxins. To address this concern, we developed spatial statistical models using the US National...

With increasing concerns about freshwater cyanobacteria blooms, there is a need to identify which waterbodies are at risk for developing these blooms, especially those that produce cyanotoxins. To address this concern, we developed spatial statistical models using the US National...

This is a presentation to be delivered to stakeholders along the Colorado River in Grand Canyon as part of a conference convened by the U.S. Bureau of Reclamation. The presentation addresses the impacts of future operations of Glen Canyon Dam on physical landscape form within Gra...

Onsite wastewater treatment systems are a major source of excess nutrients and co-pollutants in groundwater. The high density of septic systems in New England’s coastal watersheds has degraded the quality of drinking and recreational freshwater resources and led to collapse...

Brownfields are increasingly called upon to be transformed from potentially contaminated, often vacant properties into community assets that provide multiple benefits. Decision-makers are using recent policy tools to encourage brownfields revitalization that helps to combat the c...

The tolerance of aquatic organisms to stressors is widely used to monitor and evaluate the condition of freshwater ecosystems. Tolerance values (TV) derived from analyses of the relationship between species and their environment are considered to be more objective than those that...

Large scale (i.e. continental United States) aquatic resource surveys often collect samples and ship to a centralized processing laboratory. The rigors and chosen methods of shipping and handling as well as holding time could impact the integrity of algal pigments. This study exa...

Aquatic ecosystem responses to wildfire can vary widely depending on the characteristics of fire and the spatial context of where a fire takes place. Assessment of wildfire risk to aquatic ecosystems requires an understanding of sources of such variability (see Ebersole et al. th...