Regions

Maryland

States L2 Landing Page Tabs

Maryland's water supply comes from streams, rivers, groundwater and reservoirs. Many of these systems flow to the Chesapeake Bay, the Nation's largest estuary.This complex ecosystem has been degraded due to the impact of human-population increase, which has doubled since 1950, The MD-DC-DE Water Science Center studies the impacts this has on water quality, habitats and biological communities.

Maryland Water

Maryland - Washington D.C.- Delaware Science Center

Maryland - Washington D.C.- Delaware Science Center

Maryland Water

Patuxent Wildlife Research Center

Patuxent Wildlife Research Center

Patuxent Research

News

A screenshot of the Coastal Change hazards portal showing erosion, overwash and inundation potentials along the east coast
September 26, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Maria, visit the USGS Hurricane Maria page at https://www.usgs.gov/maria.

Image shows a geologic map of the Lower 48
August 21, 2017

A carbonatite here, a glacial moraine there, a zig-zagging fault or two, even a behemoth of a batholith. The geology of the 50 States is an enormous patchwork of varied forms, beautiful in their variance but challenging to present as a single map.

Chesapeake Bay coast at St. Michaels, Maryland
June 14, 2017

 Low- and no-oxygen area threatens crabs, oysters, fish

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Potential coastal change impacts for Hurricane Joaquin - Oct. 4, 2015
Date Published: March 28, 2018
Status: Completed

Hurricane Joaquin - Forecast and Documentation of Coastal Change

Hurricane Joaquin coastal change forecast and pre- and post-storm photos documenting coastal change.

Response Immune System
Date Published: March 14, 2018
Status: Active

Disease Resistance of Wildlife Species: how the immune system evolves and adapts

The Challenge: In an era when emerging infectious diseases are steadily increasing, human populations are exposed to virulent new pathogens.  Insight into the human system can be gained from understanding the variety of immune adaptations of wildlife species.  The vertebrate immune system is not static.  Rather, it involves in response to the environment.

A hardened shoreline (rip-rap revetment)
Date Published: March 14, 2018
Status: Active

Shoreline Changes and Impacts to Natural Resources in Chesapeake Bay

The Challenge: Climate change and sea level rise are expected to affect many miles of shoreline in the Chesapeake Bay and elsewhere along the Atlantic Coast in the coming years. In this scenario, federal and state agencies need to make more detailed assessments of how different watersheds and shoreline types might influence an array of ecosystem functions and components. Recently, most states...

Mallard
Date Published: March 12, 2018
Status: Active

Pathogens in the Aquatic Environment – Waterfowl, Avian Influenza

The Challenge: Changes in aquatic ecosystems related to climate change phenomena or other anthropogenically based environmental stressors have significant impact on the dynamics of the host-pathogen-environment relationship, often with surprising results. Therefore, biosurveillance of the aquatic environment for pathogens of significance to aquatic and terrestrial wildlife, as well as to...

Location of Upper Diffcult, Virginia - Locations of channel an floodplain measurements
Date Published: January 24, 2018
Status: Active

U.S. Geological Survey (USGS) Science Summary—The Role of Storms on Bank Erosion Rates and Sediment Transport in Urban Areas

Sediment is a major pollutant degrading aquatic ecosystems in the Chesapeake Bay watershed. The USGS is conducting studies to determine the relative importance of streambank erosion to other sediment sources, such as upland erosion, in both agricultural and urban areas. The information is necessary so resource managers can focus on the types, and locations, of practices that will be most...

Oblique aerial photograph near Rodanthe, NC, looking south along the coast on August 30, 2011, three days after landfall of Hurr
Date Published: January 18, 2018
Status: Active

National Assessment of Storm-Induced Coastal Change Hazards

The overall objective is to improve real-time and scenario-based predictions of coastal change to support management of coastal infrastructure, resources, and safety. Research is part of the  National Assessment of Coastal Change Hazards project.

coastal vulnerability of sea-level rise map
Date Published: January 18, 2018
Status: Active

National Assessment of Coastal Vulnerability to Sea Level Rise

This research seeks to objectively determine the relative risks due to future sea-level rise for the U.S. Atlantic, Pacific, and Gulf of Mexico coasts. Research is part of National Assessment of Coastal Change Hazards project. 

Oblique aerial photograph looking to the southwest along the southern end of Cedar Island, Virginia
Date Published: January 18, 2018
Status: Active

Long-Term Coastal Change

Goals of this project include developing and improving coastal-change assessments and supporting long-term planning and decision making to ensure sustainable coastal economies, infrastructure, and ecosystems. Research is part of the National Assessment of Coastal Change Hazards...

Cliff erosion is a common storm-induced hazard along the West Coast.
Date Published: January 17, 2018
Status: Active

National Assessment of Coastal Change Hazards

Research to identify areas that are most vulnerable to coastal change hazards including beach and dune erosion, long-term shoreline change, and sea-level rise.

Susquehanna River at Conowingo Dam
Date Published: January 17, 2018

Conowingo Dam Above 90 Percent Capacity For Sediment Storage

The Conowingo Dam on the Susquehanna River is at about 92 percent capacity for sediment storage according to new U.S. Geological Survey research.

View of the Chesapeake Bay
Date Published: January 17, 2018

Chesapeake Bay ‘dead zone’ to vary from average to slightly smaller

Hypoxic zone size affected by low river flow and nutrient loading

Scientists expect that this year’s mid-summer Chesapeake Bay hypoxic low-oxygen zone or “dead zone” – an area of low to no oxygen that can kill fish and aquatic life – will be approximately 1.58 cubic miles, about the volume of 2.3 million Olympic-size swimming pools. This is close to the long-term...

Chesapeake Bay Program Logo
Date Published: January 17, 2018
Status: Active

USGS contributes Toward Assessment of Bay's Health and Restoration

The federal agencies leading the watershed-wide effort to restore the Chesapeake Bay have released a progress report highlighting work completed in the 2015 fiscal year.

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Science Datasets
/data-tools/key-findings-scenario-based-assessment-hurricanes

Key Findings for Scenario-Based Assessment for Hurricanes

summary of key findings for scenario-based assessment for hurricanes
February 14, 2018

Percentage of sandy beaches very likely (probability > 0.9) to experience erosion associated with collision, overwash, and inundation during category 1-5 hurricane landfall.

Web Application
/data-tools/oblique-aerial-photography-viewer

Oblique Aerial Photography Viewer

Oblique Aerial Photography Viewer
January 19, 2018

Obique photos offer a unique perspective of the coast. Features such as beach erosion or accretion, dune erosion and overwash can all be clearly characterized in this imagery. It also documents coastal infrastructure, as well as the damage that infrastructure may incur as the result of an impacting hurricane. 

Science Datasets
/data-tools/pharmaceuticals-water-fish-and-ospreys-nesting-delaware-river-and-bay

Pharmaceuticals in water, fish, and ospreys nesting in Delaware River and Bay

Pharmaceuticals in water, fish, and ospreys nesting in Delaware River and Bay
October 19, 2017

Exposure of wildlife to Active Pharmaceutical Ingredients (APIs) is likely to occur but evidence of hazard and risk is limited. One exposure pathway that has received attention is trophic transfer of APIs in a water-fish-osprey food chain. 

Water
/data-tools/national-water-information-system-nwis

National Water Information System (NWIS)

Application screenshot thumbnail
September 1, 2017

The National Water Information System (NWIS) web application provides access to surface-water, groundwater, water-quality, and water-use data collected at approximately 1.5 million sites across all 50 states.

Real-time Data
/data-tools/national-water-information-system-nwis-mapper-0

National Water Information System (NWIS) Mapper

NWIS-Mapper thumbnail image
August 30, 2017

The National Water Information System (NWIS) Mapper provides access to water-resources data at over 1.5 million sites across the U.S., including current and historical data. Users can search by site type, data type, site number, or place.

Web Application
/data-tools/coastal-change-hazards-portal

Coastal Change Hazards Portal

Coastal Change Hazards Portal Interactive Mapper screen grab
August 24, 2017

Interactive access to coastal change science and data for our Nation’s coasts. Information and products are organized within three coastal change hazard themes: 1) extreme storms, 2) shoreline change, and 3) sea-level rise. Each data item represents an individual research product, with some items grouped together as aggregates to show the breadth of the topic and make it easy to explore.

Science Datasets
/data-tools/atypical-feeding-behavior-long-tailed-ducks-wake-a-commercial-fishing-boat-while-clamming

Atypical Feeding Behavior of Long-tailed Ducks in the Wake of a Commercial Fishing Boat while Clamming

Long-tailed duck swimming
August 7, 2017

Data represents analyses of gizzard and gullet (esophagus and proventriculus) of nine ducks using traditional techniques

Science Datasets
/data-tools/standardization-and-application-index-community-integrity-waterbirds-chesapeake-bay

Standardization and Application of an Index of Community Integrity for Waterbirds in the Chesapeake Bay

American Black Duck (Anas rubripes)
July 6, 2017

This data set is comprised of five files related to the modification and scoring of Index of Waterbird Community Integrity (IWCI) scores for all waterbirds of the Chesapeake Bay. One Excel file (A) contains a list of 100+ Chesapeake waterbird species and their species attribute and IWCI scores.

Science Datasets
/data-tools/low-pathogenic-avian-influenza-viruses-wild-migratory-waterfowl-a-region-high-poultry

Low-pathogenic avian influenza viruses in wild migratory waterfowl in a region of high poultry production, Delmarva, Maryland

Mallard
March 28, 2017

This data set is comprised of four files related to the biosurveillance of low pathogenic avian influenza viruses (LPAIV) in migratory waterfowl at 22 locations in the Maryland portion of the Delmarva Peninsula in fall/winter of 2013-2014. 

Science Datasets
/data-tools/high-resolution-geophysical-data-collected-along-delmarva-peninsula-2014-us-geological

High-resolution geophysical data collected along the Delmarva Peninsula 2014, U.S. Geological Survey Field Activity 2014-002-FA

Delmarva bathymetry
October 31, 2016

High-resolution geophysical data collected along the Delmarva Peninsula in 2014.

Real-time Data
/data-tools/water-quality-data-maryland

Water Quality Data for Maryland

Technician taking bacteria sample
September 29, 2016

Chemical, physical, and biological properties of water, sediment from Maryland, Delaware, and Washington DC sources. Water-quality data are collected as either discrete field measurements or as continuous time-series data from automated recorders that continuously record physical and chemical characteristics including pH, specific conductance, temperature, and dissolved oxygen.

Real-time Data
/data-tools/groundwater-data-maryland

Groundwater Data for Maryland

Image of groundwater discharging from well CHN-849
September 28, 2016

Data from wells, springs, and other groundwater sources in Maryland; well location data includes information such as latitude and longitude, well depth, and aquifer. Groundwater level data are collected and stored as either discrete field-water-level measurements or as continuous time-series data from automated recorders.

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Figure showing the main page of the SPARROW Decision Support Tool
August 24, 2016

2002 Total Phosphorus Model for the Chesapeake Bay Watershed

Figure showing the main page of the SPARROW Decision Support Tool
August 24, 2016

2002 Total Nitrogen Model for the Chesapeake Bay Watershed

Groundwater Wells on Assateague Island
July 14, 2016

Well locations at Assateague Island National Seashore, Worcester County, MD.

Digital Elevation Model in the Atchafalaya Basin, LA
April 19, 2016

The 3DEP products and services available through The National Map consist of standard digital elevation models (DEMs) at various horizontal resolutions, elevation source and associated datasets, an elevation point query service and bulk point query service. All 3DEP products are available, free of charge and without use restrictions.

USGS Storm-Tide Mapper and Data Services
March 8, 2016

The USGS Storm Tide Mapper is a tool for viewing, analyzing, and accessing storm tide data collected during and after hurricanes and Nor’easters. The USGS Storm Tide Mapper will continue to provide a unified and consistent source of real-time and archived storm-tide data.

Map shows color-coded seafloor character offshore of Monterey, California
March 7, 2016

This portal is a “go to” source for maps related to ocean and coastal mapping. Information is organized by geography or region, by theme, and by the year data was published.

Filter Total Items: 7
Year Published: 2016

High-resolution geophysical data collected along the Delmarva Peninsula, 2014, USGS Field Activity 2014-002-FA

The Delmarva Peninsula is a 220-kilometer-long headland, spit, and barrier island complex that was significantly affected by Hurricane Sandy. A U.S. Geological Survey cruise was conducted in the summer of 2014 to map the inner continental shelf of the Delmarva Peninsula using geophysical and sampling techniques to define the geologic framework...

Pendleton, Elizabeth; Ackerman, Seth D.; Baldwin, Wayne E.; Danforth, William W.; Foster, David S.; Thieler, E. Robert; Brothers, Laura L.
Pendleton, E.A., Ackerman, S.D., Baldwin, W.E., Danforth, W.W., Foster, D.S., Thieler, E.R., and Brothers, L.L. 2015, High-resolution geophysical data collected along the Delmarva Peninsula, 2014, USGS Field Activity 2014-002-FA (ver. 2.0, March 2015): U.S. Geological Survey data release. http://dx.doi.org/10.5066/F7MW2F60

Year Published: 2016

Historical files from Federal Government mineral exploration-assistance programs, 1950 to 1974

The Defense Minerals Administration (DMA), Defense Minerals Exploration Administration (DMEA), and Office of Minerals Exploration (OME) mineral exploration programs were active over the period 1950–1974. Under these programs, the Federal Government contributed financial assistance in the exploration for certain strategic and critical minerals. The...

Frank, David G.
Frank, D.G., 2016, Historical files from Federal Government mineral exploration-assistance programs, 1950 to 1974: U.S. Geological Survey Data Series 1004, http://dx.doi.org/10.3133/ds1004.

Year Published: 2016

Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA

Despite historical observations of potential microcystin-producing cyanobacteria (including Leptolyngbya,Phormidium, Pseudoanabaena, and Anabaena species) in 74% of headwater streams in Alabama, Georgia, South Carolina, and North Carolina (USA) from 1993 to 2011, fluvial cyanotoxin occurrence has not been systematically assessed in the...

Loftin, Keith A.; Clark, Jimmy M.; Journey, Celeste ; Kolpin, Dana W.; Van Metre, Peter C.; Bradley, Paul M.
Loftin, K.A., J.M. Clark, C.A. Journey, D.W. Kolpin, P.C. Van Metre, and P.M. Bradley. Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern United States. Environmental Toxicology & Chemistry. http://dx.doi.org/10.1002/etc.3391

Year Published: 2015

U.S. Geological Survey Chesapeake science strategy, 2015-2025—Informing ecosystem management of America’s largest estuary

Executive Summary The U.S. Geological Survey (USGS) has the critical role of providing scientific information to improve the understanding and management of the Chesapeake Bay ecosystem. The USGS works with Federal, State, and academic science partners to provide research and monitoring, and communicate results of these activities to enhance...

Phillips, Scott; Blomquist, Joel D.; Phillips, Scott; Blomquist, Joel D.; Bennett, Mark; Berlin, Alicia; Blazer, Vicki; Claggett, Peter; Faulkner, Stephen; Hyer, Kenneth; Ladino, Cassandra; Moyer, Douglas; Muir, Rachel; Noe, Gregory; Phillips, Patrick J.
Phillips, Scott, and Blomquist, Joel, eds., 2015, U.S. Geological Survey Chesapeake science strategy, 2015–2025—Informing ecosystem management of America’s largest estuary: U.S. Geological Survey Open-File Report 2015–1162, 43 p., http://dx.doi.org/10.3133/ofr20151162.

Year Published: 2008

Algal and Invertebrate Community Composition along Agricultural Gradients: A Comparative Study from Two Regions of the Eastern United States

Benthic algal and invertebrate communities in two Coastal Plain regions of the Eastern United States?the Delmarva Peninsula (27 sites) and Georgia Upper Coastal Plain (29 sites)?were assessed to determine if aspects of agricultural land use and nutrient conditions (dissolved and whole-water nitrogen and phosphorus) could be linked to biological...

Calhoun, Daniel L.; Gregory, M. Brian; Weyers, Holly S.
Algal and Invertebrate Community Composition along Agricultural Gradients: A Comparative Study from Two Regions of the Eastern United States; 2008; SIR; 2008-5046; Calhoun, Daniel L.; Gregory, M. Brian; Weyers, Holly S.

Year Published: 2008

Simulated fate and transport of metolachlor in the unsaturated zone, Maryland, USA

An unsaturated-zone transport model was used to examine the transport and fate of metolachlor applied to an agricultural site in Maryland, USA. The study site was instrumented to collect data on soil-water content, soil-water potential, ground water levels, major ions, pesticides, and nutrients from the unsaturated zone during 2002-2004. The data...

Bayless, E.R.; Capel, P.D.; Barbash, J.E.; Webb, R.M.T.; Hancock, T.L.C.; Lampe, D.C.
Simulated fate and transport of metolachlor in the unsaturated zone, Maryland, USA; 2008; Article; Journal; Journal of Environmental Quality; Bayless, E. R.; Capel, P. D.; Barbash, J. E.; Webb, R. M. T.; Hancock, T. L. C.; Lampe, D. C.

Year Published: 2007

Development of Relations of Stream Stage to Channel Geometry and Discharge for Stream Segments Simulated with Hydrologic Simulation Program-Fortran (HSPF), Chesapeake Bay Watershed and Adjacent Parts of Virginia, Maryland, and Delaware

The U.S. Geological Survey (USGS), U.S. Environmental Protection Agency (USEPA), Chesapeake Bay Program (CBP), Interstate Commission for the Potomac River Basin (ICPRB), Maryland Department of the Environment (MDE), Virginia Department of Conservation and Recreation (VADCR), and University of Maryland (UMD) are collaborating to improve the...

Moyer, Douglas; Bennett, Mark
Development of Relations of Stream Stage to Channel Geometry and Discharge for Stream Segments Simulated with Hydrologic Simulation Program-Fortran (HSPF), Chesapeake Bay Watershed and Adjacent Parts of Virginia, Maryland, and Delaware; 2007; SIR; 2007-5135; Moyer, Douglas L.; Bennett, Mark R.

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USGS
January 23, 2017

Estimates patch occupancy rates and related parameters.

USGS
July 14, 2016

fatalityCMR - capture-recapture software to correct raw counts of wildlife fatalities using trial experiments for carcass detecition probability and persistence time. Version 3.0

Filter Total Items: 37
February 28, 2018

Bee Laboratory (Instagram Story)

Instagram story showing the USGS Bee Inventory and Monitoring Lab clearing invasive species from a field.

Satellite image showing the Delaware Bay and Chesapeake Bay region
January 25, 2017

Satellite Image of the Delaware Bay and Chesapeake Bay Region

This Indian Space Research Organization LISS-3 image of the Delaware Bay and Chesapeake Bay region, acquired on January 25, 2017, shows the landscape along the densely populated U.S. East coast. Ecosystems and sea-level rise are among the regional landscape changes that satellite imagery helps to monitor. 

August 26, 2016

First Days - Harlequin Ducks

This ridiculously cute video of baby Harlequin Ducks (Histrionicus histrionicus) shows their first day outside the egg (about 20 hours old). Scientists at Patuxent Wildlife Research Center are training ducks to respond to sounds — just like a hearing test given to kids during elementary school — to learn more about their ability to hear underwater. This will inform the design of effective...

Image shows a detail of the texture of marble
July 20, 2016

Cockeysville Marble

Marble is a famous metamorphic rock known for its use in sculpture and architecture. This particular marble came from the Campbell Quarry in Texas, Maryland.

Attribution: Northeast
Image shows detail of dark crystals in marble
July 20, 2016

Diopside Crystals

Diopside crystals are made up of Magnesium, Calcium, Silicon and Oxygen, and are usually found in metamorphic rocks. These crystals have developed in some Cockeysville Marble from Texas, Maryland.

Attribution: Northeast
As US models predicted Hurricane Joaquin washed out a road at Kitty Hawk, NC in 2015.
June 1, 2016

Hurricane erodes N.C. road

As US models predicted Hurricane Joaquin washed out a road at Kitty Hawk, NC in 2015.

A long-tailed duck, two days old, standing. 
May 31, 2016

A long-tailed duck, 2 days old

A long-tailed duck, two days old, standing. 

Osprey Chicks on the James River
April 15, 2016

DDT nearly wiped out these birds, now they’re making a comeback

Washington Post article on the impacts of DDT on birds.

Low elevations between the dunes acted as channels to transport sand and water inland
October 7, 2015

Oblique aerial photographs of Assateague Island National Seashore, MD

Oblique aerial photographs of Assateague Island National Seashore, Maryland. View looking west along Assateague Island. Low elevations between the dunes acted as channels to transport sand and water inland (green arrow). The yellow arrow in each image points to the same feature.

there is no dune scarp or overwash fan that would indicate that the waves and surge from Joaquin reached the base or crest of th
October 7, 2015

Oblique aerial photographs of Assateague Island National Seashore, MD

Oblique aerial photographs of Assateague Island National Seashore, Maryland. View looking west along Assateague Island. Standing water behind the dunes (green arrow) is often an indication that the beach has been inundated. At this location, however, there is no dune scarp or overwash fan that would indicate that the waves and surge from Joaquin reached the base or crest of...

Overwash occurred at the cut in the dunes where a dark sand deposit shows evidence of landward transport
October 7, 2015

Oblique aerial photographs of Assateague Island National Seashore, Mar

Oblique aerial photographs of Assateague Island National Seashore, Maryland. View looking west along Assateague Island. Overwash occurred at the cut in the dunes where a dark sand deposit shows evidence of landward transport (green arrow). The yellow arrow in each image points to the same feature. [...

Waves and surge from Hurricane Joaquin did not reach the dune toe but did cause erosion and narrowing of the beach.
October 7, 2015

Oblique aerial photographs of North Ocean City, Maryland

Oblique aerial photographs of North Ocean City, Maryland. View looking west at North Ocean City. The dunes in this location have accreted and the dune vegetation has been covered by wind-blown sand (green arrows). Waves and surge from Hurricane Joaquin did not reach the dune toe but did cause erosion and narrowing of the beach. The yellow arrow in each image points to the same...

The "Best Report" for 2014 is "Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas, Standard Chlorine of Delaware, Inc. Superfund Site, New Castle County, Delaware, 2009-12"

Hydrogeologic characterization and assessment of bioremediation of chlorinated benzenes and benzene in wetland areas
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A screenshot of the Coastal Change hazards portal showing erosion, overwash and inundation potentials along the east coast
September 26, 2017

To learn more about USGS’ role providing science to decision makers before, during and after Hurricane Maria, visit the USGS Hurricane Maria page at https://www.usgs.gov/maria.

Image shows a geologic map of the Lower 48
August 21, 2017

A carbonatite here, a glacial moraine there, a zig-zagging fault or two, even a behemoth of a batholith. The geology of the 50 States is an enormous patchwork of varied forms, beautiful in their variance but challenging to present as a single map.

A Manatee swimming in Florida waters.
April 11, 2017

Florida’s iconic manatee population is highly likely to endure for the next 100 years, so long as wildlife managers continue to protect the marine mammals and their habitat, a new study by the US Geological Survey and the Florida Fish and Wildlife Research Institute has found.

Scientist collects samples from a temporary wooden platform in a New Jersey salt marsh
January 24, 2017

If coastal salt marshes are like savings accounts, with sediment as the principal, all eight Atlantic and Pacific coast salt marshes studied are "in the red," researchers found.

Western bumblebee (Bombus occidentalis)
January 23, 2017

Patuxent Scientist Sam Droege interviewed for "Inside Science" about how commercially managed bumblebees and honey bees may be contributing to wild pollinator decline. 

Photo of a young girl drinking water, which likely originated from groundwater sources. 
January 19, 2017

A regional assessment of untreated groundwater in the Northern Atlantic Coastal Plain aquifer system in the eastern United States is now available from the U.S. Geological Survey.

Photo of a young girl drinking water, which likely originated from groundwater sources. 
January 19, 2017

A regional assessment of untreated groundwater in the combined Valley and Ridge and Piedmont and Blue Ridge aquifers in the eastern United States is now available from the U.S. Geological Survey.

Baltimore Harbor Water Wheel (aka “Mr. Trash Wheel”)
October 14, 2016

Online sites will provide the first real-time, user-friendly Inner Harbor water information

USGS: Science for a changing world
September 6, 2016

Threats to groundwater availability and sustainability in the Northern Atlantic Coastal Plain are dependent to a large degree by the type of aquifers used for water supply, according to a new regional assessment by the U.S. Geological Survey.

Blue Ridge sculpin with Dermocystidium
July 26, 2016

A fish pathogen similar to one previously found in the United States only in Pacific salmonids -- salmon and trout species -- has been identified for the first time in the eastern United States and in a non-salmon species, according to new research by the U.S. Geological Survey.