Skip to main content
U.S. flag

An official website of the United States government

Karli Rogers

Karli is a Fish Biologist at the Eastern Ecological Science Center in Kearneysville, WV.

Science and Products

Stream temperature and fish community data upstream and downstream of an impoundment in Big Hunting Creek, Maryland Stream temperature and fish community data upstream and downstream of an impoundment in Big Hunting Creek, Maryland

This Data Release provides stream temperature data (13 sites) and fish community data (3 sites) in Big Hunting Creek, Maryland. Data were collected during summer baseflow conditions in 2023. This product supports brook trout conservation and restoration research needs identified by Maryland Department of Natural Resources. We collected temperature data with Onset ProV2 water temperature...
By
Eastern Ecological Science Center

Capture-recapture data for a restored population of Blue Ridge sculpin (Cottus caeruleomentum) with environmental covariates Capture-recapture data for a restored population of Blue Ridge sculpin (Cottus caeruleomentum) with environmental covariates

This dataset includes spatial capture-recapture data for a restored population of Blue Ridge sculpin (Cottus caeruleomentum) with stream temperature and stream flow observations in Big Hunting Creek, Maryland.
By
Eastern Ecological Science Center

Stream temperature data for sites in the Potomac River headwaters during 2022 Stream temperature data for sites in the Potomac River headwaters during 2022

This Data Release contains stream temperature data for 12 sites within the headwaters of the Potomac River basin. Data were collected between June 1-August 31, 2022 (92 days) at 30-minute increments. We collected data using Onset ProV2 gages in perforated PVC cases mounted to stream substrates with rebar. This work was funded by the USGS Priority Ecosystem Science program for the...
By
Chesapeake Bay Activities, Eastern Ecological Science Center

Fish species abundance data for selected streams of the Potomac River basin Fish species abundance data for selected streams of the Potomac River basin

This Data Release contains data on fish species abundance for selected streams of the Potomac River basin in eastern North America. This dataset supports analysis of karst streams in the Chesapeake Bay headwaters region and was funded by USGS Chesapeake Bay studies.
By
Chesapeake Bay Activities, Eastern Ecological Science Center

USGS EcoDrought Stream Discharge, Gage Height, and Water Temperature in Shenandoah National Park, Virginia USGS EcoDrought Stream Discharge, Gage Height, and Water Temperature in Shenandoah National Park, Virginia

The U.S. Geological Survey (USGS) Water Mission Area (WMA) - Ecosystems Mission Area (EMA) EcoDrought project is comprised of interdisciplinary teams in five pilot regions across the country. The over-arching project goal is to measure streamflow in headwater streams and to relate flow variation to stream fish population dynamics. For the catchments located in Shenandoah National Park...
By
Eastern Ecological Science Center, New England Water Science Center

USGS EcoDrought Stream Discharge, Gage Height and Water Temperature Data in Massachusetts (ver. 2.1, August 2025) USGS EcoDrought Stream Discharge, Gage Height and Water Temperature Data in Massachusetts (ver. 2.1, August 2025)

The USGS Water Mission Area (WMA) - Ecosystems Mission Area (EMA) EcoDrought project is comprised of interdisciplinary teams in five pilot regions across the country. The over-arching project goal is to measure streamflow in headwater streams and to relate flow variation to stream fish population dynamics. In the northeast, the New England Water Science Center (NewEngWSC) partnered with...
By
Eastern Ecological Science Center, New England Water Science Center
A biologist is sitting in a small stream and holding a cylindrical case that holds a small water temperature logger.
Installation of a Water Temperature Logger in Blue Blazes Run
Installation of a Water Temperature Logger in Blue Blazes Run
A biologist is sitting in a small stream and holding a cylindrical case that holds a small water temperature logger.

Installation of a Water Temperature Logger in Blue Blazes Run

Installation of a Water Temperature Logger in Blue Blazes Run

Zachary Kelly installs a water temperature logger in Blue Blazes Run, a headwater stream in Catoctin Mountain Park, MD. 

By
Eastern Ecological Science Center, Eastern Ecological Science Center
A biologist is sitting in a small stream and holding a cylindrical case that holds a small water temperature logger.

Installation of a Water Temperature Logger in Blue Blazes Run

Installation of a Water Temperature Logger in Blue Blazes Run

Zachary Kelly installs a water temperature logger in Blue Blazes Run, a headwater stream in Catoctin Mountain Park, MD. 

By
Eastern Ecological Science Center, Eastern Ecological Science Center
Two biologists are installing a temperature logger in a mountain stream using a piece of rebar and a sledge hammer a
Installation of a Water Temperature Logger in Catoctin Mountain Park
Installation of a Water Temperature Logger in Catoctin Mountain Park
Two biologists are installing a temperature logger in a mountain stream using a piece of rebar and a sledge hammer a

Installation of a Water Temperature Logger in Catoctin Mountain Park

Installation of a Water Temperature Logger in Catoctin Mountain Park

Karmann Kessler and Zachary Kelly install a water temperature logger in Big Hunting Creek in Catoctin Mountain Park, MD.

By
Ecosystems, Eastern Ecological Science Center, Eastern Ecological Science Center
Two biologists are installing a temperature logger in a mountain stream using a piece of rebar and a sledge hammer a

Installation of a Water Temperature Logger in Catoctin Mountain Park

Installation of a Water Temperature Logger in Catoctin Mountain Park

Karmann Kessler and Zachary Kelly install a water temperature logger in Big Hunting Creek in Catoctin Mountain Park, MD.

By
Ecosystems, Eastern Ecological Science Center, Eastern Ecological Science Center
Map of Potomac River basin
Map of Potomac River basin
Map of Potomac River basin
Map of Potomac River basin

Map of Potomac River basin

Map of Potomac River basin

The study area within the Potomac River basin of eastern North America. Open circles show sample site locations on streams within the C&O Canal National Historical Park. Shaded areas show physiographic regions within Maryland from west to east as the Ridge and Valley, Blue Ridge, and Piedmont, and the stippled areas show regions of karst geology.

By
Chesapeake Bay Activities
Map of Potomac River basin

Map of Potomac River basin

Map of Potomac River basin

The study area within the Potomac River basin of eastern North America. Open circles show sample site locations on streams within the C&O Canal National Historical Park. Shaded areas show physiographic regions within Maryland from west to east as the Ridge and Valley, Blue Ridge, and Piedmont, and the stippled areas show regions of karst geology.

By
Chesapeake Bay Activities
A biologist is crouching in a stream and measuring the distance from the surface of the water to a marker above the water
Karli Rogers collecting gage height data
Karli Rogers collecting gage height data
A biologist is crouching in a stream and measuring the distance from the surface of the water to a marker above the water

Karli Rogers collecting gage height data

Karli Rogers collecting gage height data

This photo shows Karli Rogers gathering gage height data to support research on a headwater stream gage in Shenandoah National Park in Virginia.

By
Eastern Ecological Science Center, Eastern Ecological Science Center
A biologist is crouching in a stream and measuring the distance from the surface of the water to a marker above the water

Karli Rogers collecting gage height data

Karli Rogers collecting gage height data

This photo shows Karli Rogers gathering gage height data to support research on a headwater stream gage in Shenandoah National Park in Virginia.

By
Eastern Ecological Science Center, Eastern Ecological Science Center

Tracking status and trends in seven key indicators of river and stream condition in the Chesapeake Bay watershed Tracking status and trends in seven key indicators of river and stream condition in the Chesapeake Bay watershed

Freshwater streams and rivers are recognized as vital habitats within the Chesapeake Bay watershed, which has been undergoing extensive restoration efforts for more than 30 years. Resource managers need to understand stream and river condition and how these conditions are changing over time to determine whether regional long-term restoration and conservation goals are being met. The...
Authors
Lindsey J. Boyle, Samuel H. Austin, Matthew J. Cashman, Zachary J. Clifton, John W. Clune, James E. Colgin, Kaitlyn E.M. Elliott, Rosemary M. Fanelli, Ellie P. Foss, Nathaniel P. Hitt, Elizabeth A. Hittle, Coral M. Howe, Emily H. Majcher, Kelly O. Maloney, Christopher A. Mason, Marina J. Metes, Douglas L. Moyer, Trevor P. Needham, Karli M. Rogers, Joshua J. Thompson, Guoxiang Yang, Tammy M. Zimmerman
By
Chesapeake Bay Activities, Pennsylvania Water Science Center, Virginia and West Virginia Water Science Center

Declines in brook trout abundance linked to atmospheric warming in Maryland, USA Declines in brook trout abundance linked to atmospheric warming in Maryland, USA

Salmonid fishes provide an important indicator of climate change given their reliance on cold water. We evaluated temporal changes in the density of stream-dwelling brook trout (Salvelinus fontinalis) from surveys conducted over a 36-year period (1988–2023) by the Maryland Department of Natural Resources in Eastern North America. Nonparametric trend analyses revealed decreasing densities...
Authors
Nathaniel P. Hitt, Karli M. Rogers, Zachary A. Kelly
By
Eastern Ecological Science Center

Utility of an instantaneous salt dilution method for measuring streamflow in headwater streams Utility of an instantaneous salt dilution method for measuring streamflow in headwater streams

Streamflow records are biased toward large streams and rivers, yet small headwater streams are often the focus of ecological research in response to climate change. Conventional flow measurement instruments such as acoustic Doppler velocimeters (ADVs) do not perform well during low-flow conditions in small streams, truncating the development of rating curves during critical baseflow...
Authors
Karli M. Rogers, Jennifer H. Fair, Nathaniel P. Hitt, Karmann G. Kessler, Zachary A. Kelly, Martin A. Briggs
By
Eastern Ecological Science Center

Effects of episodic stream dewatering on brook trout spatial population structure Effects of episodic stream dewatering on brook trout spatial population structure

Stream dewatering is expected to become more prevalent due to climate change, and we explored the potential consequences for brook trout (Salvelinus fontinalis) within a temperate forest ecosystem in eastern North America.We estimated fish density within stream pools (n = 386) from electrofishing surveys over 10 years (2012–2021) to compare a stream that exhibits episodic dewatering...
Authors
Nathaniel P. Hitt, Karli M. Rogers, Karmann G. Kessler, Martin A. Briggs, Jennifer H. Fair, Andrew C. Dolloff
By
Water Resources Mission Area, Chesapeake Bay Activities, Eastern Ecological Science Center, New England Water Science Center

Karst terrain promotes thermal resiliency in headwater streams Karst terrain promotes thermal resiliency in headwater streams

The response of stream ecosystems to climate change will depend in part on groundwater processes that reduce the sensitivity of streams to atmospheric conditions. We investigated the thermal sensitivity of streams across a gradient of groundwater inputs defined by karst terrain (carbonate parent materials) in the headwaters of the Potomac River basin in eastern North America. We...
Authors
Karmann G. Kessler, Karli M. Rogers, Charles Marshak, Nathaniel P. Hitt
By
Ecosystems Mission Area, Eastern Ecological Science Center

Stabilising effects of karstic groundwater on stream fish communities Stabilising effects of karstic groundwater on stream fish communities

Although groundwater exchange processes are known to modulate atmospheric influences on stream temperature and flow, the implications for ecological stability are poorly understood. Here, we evaluated temporal change in stream fish communities across a gradient of groundwater influence defined by karst terrain (carbonate parent materials) within the Potomac River basin of eastern North...
Authors
Nathaniel P. Hitt, Karli M. Rogers, Karmann G. Kessler, Martin A. Briggs, Jennifer H. Fair
By
Ecosystems Mission Area, Water Resources Mission Area, Eastern Ecological Science Center, New England Water Science Center

Science and Products

Stream temperature and fish community data upstream and downstream of an impoundment in Big Hunting Creek, Maryland Stream temperature and fish community data upstream and downstream of an impoundment in Big Hunting Creek, Maryland

This Data Release provides stream temperature data (13 sites) and fish community data (3 sites) in Big Hunting Creek, Maryland. Data were collected during summer baseflow conditions in 2023. This product supports brook trout conservation and restoration research needs identified by Maryland Department of Natural Resources. We collected temperature data with Onset ProV2 water temperature...
By
Eastern Ecological Science Center

Capture-recapture data for a restored population of Blue Ridge sculpin (Cottus caeruleomentum) with environmental covariates Capture-recapture data for a restored population of Blue Ridge sculpin (Cottus caeruleomentum) with environmental covariates

This dataset includes spatial capture-recapture data for a restored population of Blue Ridge sculpin (Cottus caeruleomentum) with stream temperature and stream flow observations in Big Hunting Creek, Maryland.
By
Eastern Ecological Science Center

Stream temperature data for sites in the Potomac River headwaters during 2022 Stream temperature data for sites in the Potomac River headwaters during 2022

This Data Release contains stream temperature data for 12 sites within the headwaters of the Potomac River basin. Data were collected between June 1-August 31, 2022 (92 days) at 30-minute increments. We collected data using Onset ProV2 gages in perforated PVC cases mounted to stream substrates with rebar. This work was funded by the USGS Priority Ecosystem Science program for the...
By
Chesapeake Bay Activities, Eastern Ecological Science Center

Fish species abundance data for selected streams of the Potomac River basin Fish species abundance data for selected streams of the Potomac River basin

This Data Release contains data on fish species abundance for selected streams of the Potomac River basin in eastern North America. This dataset supports analysis of karst streams in the Chesapeake Bay headwaters region and was funded by USGS Chesapeake Bay studies.
By
Chesapeake Bay Activities, Eastern Ecological Science Center

USGS EcoDrought Stream Discharge, Gage Height, and Water Temperature in Shenandoah National Park, Virginia USGS EcoDrought Stream Discharge, Gage Height, and Water Temperature in Shenandoah National Park, Virginia

The U.S. Geological Survey (USGS) Water Mission Area (WMA) - Ecosystems Mission Area (EMA) EcoDrought project is comprised of interdisciplinary teams in five pilot regions across the country. The over-arching project goal is to measure streamflow in headwater streams and to relate flow variation to stream fish population dynamics. For the catchments located in Shenandoah National Park...
By
Eastern Ecological Science Center, New England Water Science Center

USGS EcoDrought Stream Discharge, Gage Height and Water Temperature Data in Massachusetts (ver. 2.1, August 2025) USGS EcoDrought Stream Discharge, Gage Height and Water Temperature Data in Massachusetts (ver. 2.1, August 2025)

The USGS Water Mission Area (WMA) - Ecosystems Mission Area (EMA) EcoDrought project is comprised of interdisciplinary teams in five pilot regions across the country. The over-arching project goal is to measure streamflow in headwater streams and to relate flow variation to stream fish population dynamics. In the northeast, the New England Water Science Center (NewEngWSC) partnered with...
By
Eastern Ecological Science Center, New England Water Science Center
A biologist is sitting in a small stream and holding a cylindrical case that holds a small water temperature logger.
Installation of a Water Temperature Logger in Blue Blazes Run
Installation of a Water Temperature Logger in Blue Blazes Run
A biologist is sitting in a small stream and holding a cylindrical case that holds a small water temperature logger.

Installation of a Water Temperature Logger in Blue Blazes Run

Installation of a Water Temperature Logger in Blue Blazes Run

Zachary Kelly installs a water temperature logger in Blue Blazes Run, a headwater stream in Catoctin Mountain Park, MD. 

By
Eastern Ecological Science Center, Eastern Ecological Science Center
A biologist is sitting in a small stream and holding a cylindrical case that holds a small water temperature logger.

Installation of a Water Temperature Logger in Blue Blazes Run

Installation of a Water Temperature Logger in Blue Blazes Run

Zachary Kelly installs a water temperature logger in Blue Blazes Run, a headwater stream in Catoctin Mountain Park, MD. 

By
Eastern Ecological Science Center, Eastern Ecological Science Center
Two biologists are installing a temperature logger in a mountain stream using a piece of rebar and a sledge hammer a
Installation of a Water Temperature Logger in Catoctin Mountain Park
Installation of a Water Temperature Logger in Catoctin Mountain Park
Two biologists are installing a temperature logger in a mountain stream using a piece of rebar and a sledge hammer a

Installation of a Water Temperature Logger in Catoctin Mountain Park

Installation of a Water Temperature Logger in Catoctin Mountain Park

Karmann Kessler and Zachary Kelly install a water temperature logger in Big Hunting Creek in Catoctin Mountain Park, MD.

By
Ecosystems, Eastern Ecological Science Center, Eastern Ecological Science Center
Two biologists are installing a temperature logger in a mountain stream using a piece of rebar and a sledge hammer a

Installation of a Water Temperature Logger in Catoctin Mountain Park

Installation of a Water Temperature Logger in Catoctin Mountain Park

Karmann Kessler and Zachary Kelly install a water temperature logger in Big Hunting Creek in Catoctin Mountain Park, MD.

By
Ecosystems, Eastern Ecological Science Center, Eastern Ecological Science Center
Map of Potomac River basin
Map of Potomac River basin
Map of Potomac River basin
Map of Potomac River basin

Map of Potomac River basin

Map of Potomac River basin

The study area within the Potomac River basin of eastern North America. Open circles show sample site locations on streams within the C&O Canal National Historical Park. Shaded areas show physiographic regions within Maryland from west to east as the Ridge and Valley, Blue Ridge, and Piedmont, and the stippled areas show regions of karst geology.

By
Chesapeake Bay Activities
Map of Potomac River basin

Map of Potomac River basin

Map of Potomac River basin

The study area within the Potomac River basin of eastern North America. Open circles show sample site locations on streams within the C&O Canal National Historical Park. Shaded areas show physiographic regions within Maryland from west to east as the Ridge and Valley, Blue Ridge, and Piedmont, and the stippled areas show regions of karst geology.

By
Chesapeake Bay Activities
A biologist is crouching in a stream and measuring the distance from the surface of the water to a marker above the water
Karli Rogers collecting gage height data
Karli Rogers collecting gage height data
A biologist is crouching in a stream and measuring the distance from the surface of the water to a marker above the water

Karli Rogers collecting gage height data

Karli Rogers collecting gage height data

This photo shows Karli Rogers gathering gage height data to support research on a headwater stream gage in Shenandoah National Park in Virginia.

By
Eastern Ecological Science Center, Eastern Ecological Science Center
A biologist is crouching in a stream and measuring the distance from the surface of the water to a marker above the water

Karli Rogers collecting gage height data

Karli Rogers collecting gage height data

This photo shows Karli Rogers gathering gage height data to support research on a headwater stream gage in Shenandoah National Park in Virginia.

By
Eastern Ecological Science Center, Eastern Ecological Science Center

Tracking status and trends in seven key indicators of river and stream condition in the Chesapeake Bay watershed Tracking status and trends in seven key indicators of river and stream condition in the Chesapeake Bay watershed

Freshwater streams and rivers are recognized as vital habitats within the Chesapeake Bay watershed, which has been undergoing extensive restoration efforts for more than 30 years. Resource managers need to understand stream and river condition and how these conditions are changing over time to determine whether regional long-term restoration and conservation goals are being met. The...
Authors
Lindsey J. Boyle, Samuel H. Austin, Matthew J. Cashman, Zachary J. Clifton, John W. Clune, James E. Colgin, Kaitlyn E.M. Elliott, Rosemary M. Fanelli, Ellie P. Foss, Nathaniel P. Hitt, Elizabeth A. Hittle, Coral M. Howe, Emily H. Majcher, Kelly O. Maloney, Christopher A. Mason, Marina J. Metes, Douglas L. Moyer, Trevor P. Needham, Karli M. Rogers, Joshua J. Thompson, Guoxiang Yang, Tammy M. Zimmerman
By
Chesapeake Bay Activities, Pennsylvania Water Science Center, Virginia and West Virginia Water Science Center

Declines in brook trout abundance linked to atmospheric warming in Maryland, USA Declines in brook trout abundance linked to atmospheric warming in Maryland, USA

Salmonid fishes provide an important indicator of climate change given their reliance on cold water. We evaluated temporal changes in the density of stream-dwelling brook trout (Salvelinus fontinalis) from surveys conducted over a 36-year period (1988–2023) by the Maryland Department of Natural Resources in Eastern North America. Nonparametric trend analyses revealed decreasing densities...
Authors
Nathaniel P. Hitt, Karli M. Rogers, Zachary A. Kelly
By
Eastern Ecological Science Center

Utility of an instantaneous salt dilution method for measuring streamflow in headwater streams Utility of an instantaneous salt dilution method for measuring streamflow in headwater streams

Streamflow records are biased toward large streams and rivers, yet small headwater streams are often the focus of ecological research in response to climate change. Conventional flow measurement instruments such as acoustic Doppler velocimeters (ADVs) do not perform well during low-flow conditions in small streams, truncating the development of rating curves during critical baseflow...
Authors
Karli M. Rogers, Jennifer H. Fair, Nathaniel P. Hitt, Karmann G. Kessler, Zachary A. Kelly, Martin A. Briggs
By
Eastern Ecological Science Center

Effects of episodic stream dewatering on brook trout spatial population structure Effects of episodic stream dewatering on brook trout spatial population structure

Stream dewatering is expected to become more prevalent due to climate change, and we explored the potential consequences for brook trout (Salvelinus fontinalis) within a temperate forest ecosystem in eastern North America.We estimated fish density within stream pools (n = 386) from electrofishing surveys over 10 years (2012–2021) to compare a stream that exhibits episodic dewatering...
Authors
Nathaniel P. Hitt, Karli M. Rogers, Karmann G. Kessler, Martin A. Briggs, Jennifer H. Fair, Andrew C. Dolloff
By
Water Resources Mission Area, Chesapeake Bay Activities, Eastern Ecological Science Center, New England Water Science Center

Karst terrain promotes thermal resiliency in headwater streams Karst terrain promotes thermal resiliency in headwater streams

The response of stream ecosystems to climate change will depend in part on groundwater processes that reduce the sensitivity of streams to atmospheric conditions. We investigated the thermal sensitivity of streams across a gradient of groundwater inputs defined by karst terrain (carbonate parent materials) in the headwaters of the Potomac River basin in eastern North America. We...
Authors
Karmann G. Kessler, Karli M. Rogers, Charles Marshak, Nathaniel P. Hitt
By
Ecosystems Mission Area, Eastern Ecological Science Center

Stabilising effects of karstic groundwater on stream fish communities Stabilising effects of karstic groundwater on stream fish communities

Although groundwater exchange processes are known to modulate atmospheric influences on stream temperature and flow, the implications for ecological stability are poorly understood. Here, we evaluated temporal change in stream fish communities across a gradient of groundwater influence defined by karst terrain (carbonate parent materials) within the Potomac River basin of eastern North...
Authors
Nathaniel P. Hitt, Karli M. Rogers, Karmann G. Kessler, Martin A. Briggs, Jennifer H. Fair
By
Ecosystems Mission Area, Water Resources Mission Area, Eastern Ecological Science Center, New England Water Science Center
Was this page helpful?