I am an aquatic ecologist at the U.S. Geological Survey. I am interested in pairing biological and physical sciences to understand the structure and function of streams and rivers.
My research focuses on aquatic productivity, water quality, and habitat restoration. I am stationed in Usk, Washington and partner with the Kalispel Tribe of Indians to help them monitor and restore culturally important aquatic habitats. These projects range from reach scale monitoring to global analyses.
Professional Experience
2020-Present: Biologist, U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Cascadia Field Station, Seattle, WA
2016-2020: Research Ecologist, Postdoctoral Fellowship, U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Cascadia Field Station, Seattle, WA
2012-2016: Research Assistant, University of Idaho, Moscow, Idaho and Washington State University, Pullman, WA
2010-2012: Senior Environmental Scientist, California Department of Water Resources (DWR), Division of Environmental Water Quality and Estuarine Studies (EWQES), West Sacramento, CA
Education and Certifications
Ph.D., Natural Resources, University of Idaho, Moscow, ID (2016)
M.S., Fish and Wildlife Management, State University of New York, Syracuse, NY (1997)
B.S., Biology, Brooklyn College, Brooklyn, NY (1994)
Affiliations and Memberships*
American Geophysical Union
American Fisheries Society
Society for Freshwater Science
Abstracts and Presentations
Mejia, F.H., V. Ouellet. 2021. Effects of global change on aquatic biocenosis- Lessons learned from cold-water refuges- The Integrative Science (I.S). Rivers Conference (virtual): June 21, 2021
Mejia F.H., C.E. Torgersen, E.K. Berntsen, T. Andersen, W. Love. 2020. Closing data gaps with citizen science to describe thermal diversity in a dam-influenced river. River Restoration Northwest Stream Restoration Symposium, February 4-6 in Stevenson, Washington. Poster presentation
Mejia, F.H. 2018, 2019, 2020 and 2021. Understanding Streams in a Watershed Context. Idaho Fish and Game Master Naturalist Program, Pend Oreille Chapter. Sandpoint, Idaho, Oral Presentation
Mejia F.H., C.E. Torgersen, E.K. Berntsen, J.R. Maroney, J.M. Connor, A.H. Fullerton, J.L. Ebersole, M.S. Lorang. 2020. Longitudinal, Lateral, Vertical, and Temporal Thermal Heterogeneity in a Large Impounded River: Implications for Cold-Water Refuges. Pacific Northwest Chapter of the Society for Freshwater Science Virtual meeting, November 18- 19.
Mejia F.H., C.E. Torgersen, E.K. Berntsen, T. Andersen, P.R. Kaufmann, and M.S. Lorang. Characterizing spatiotemporal variability in water temperature and habitat to inform restoration for cold-water fishes. 2020. 30th Annual Idaho Water Quality Workshop, February 11-13 in Boise, Idaho. Oral presentation.
Science and Products
Updated classifications of flow permanence on streams in the Colville National Forest
The Issue: Streamflow permanence refers to the probability that a stream will lose surface flow (become a dry channel), as well as the timing, duration, and frequency of drying. Patterns of streamflow permanence drive important decisions regarding forest management and other land uses. The Colville National Forest Land and Resource Management Plan (2019), for example, specifies riparian management...
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Distribution, frequency, and global extent of hypoxia in rivers
To assess the distribution, frequency, and global extent of riverine hypoxia, we compiled 118 million paired dissolved oxygen (DO) and water temperature measurements from 125,158 unique locations in rivers in 93 countries and territories across the globe. The dataset also includes site characteristics derived from StreamCat, the National Hydrography and HydroAtlas datasets and proximal land cover
Fishes of the Harney Basin revisited: A contemporary assessment of the distribution of fish fauna throughout the Harney Basin from 1990 to 2019 (ver. 2.0, April 2022)
We compiled electrofishing and habitat data sampled from 1990 to 2019 in the Harney Basin by the US Geological Survey (USGS), Oregon Department of Fish and Wildlife (ODFW) and the High Desert Partnership (HDP) to describe native and non-native fish distributions and their habitat associations. USGS collected eDNA data in 2019 to refine the known distributions of common carp (Cyprinus carpio). Site
Airborne thermal infrared remote sensing of summer water temperature in the Middle Fork John Day River (Oregon) in 1994-2003
This data release combines seven airborne thermal infrared (TIR) remote sensing data sets of stream temperature collected along the mainstem of the Middle Fork John Day River (MFJD) in Oregon from 1994 to 2003. Years 1994, 1995, 1996, 1998, and 2002 have single datasets. Year 2003 has two data sets. Most of the TIR data covered the upstream half of the MFJD mainstem between river km 50 and 110, wh
Water temperature data from the Priest River, Idaho, 2018-2019
Water temperature data were collected in summer 2018 and 2019. Temperature data loggers were deployed in tributary confluences and the mainstem of the lower Priest River between Priest Lake Outlet Dam and the confluence with the Pend Oreille River. Data loggers were checked every 2 to 3 weeks throughout the summer. Data for Lagrangian longitudinal thermal profiles were obtained on August 21, 2018
Water temperature data from the Pend Oreille River, Washington and Idaho, 2016-2018
The data were collected summer, 2016, 2017, and 2018. Continuous temperature loggers were deployed along the Pend Oreille River between Albeni Falls Dam and the Box Canyon Dam. Loggers were checked every 1-2 weeks throughout the summer.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Fishes of Harney Basin revisited: An assessment of the distribution of native and nonnative fishes over a half century
The Harney Basin is Oregon's largest internally draining basin and contains a unique native fish assemblage. The first and only comprehensive study of the origin and distribution of Harney Basin fishes occurred in 1971. Here, we update this study and identify potential threats to the basin's native fishes a half century later. Our assessment documents that all species of native fishes are still pr
Authors
Matthew Laramie, Jason Dunham, Francine H. Mejia, Emily Dawn Heaston, Peter A Bisson
Closing the gap between science and management of cold-water refuges in rivers and streams
Human activities and climate change threaten coldwater organisms in freshwater ecosystems by causing rivers and streams to warm, increasing the intensity and frequency of warm temperature events, and reducing thermal heterogeneity. Cold-water refuges are discrete patches of relatively cool water that are used by coldwater organisms for thermal relief and short-term survival. Globally, cohesive man
Authors
Francine H. Mejia, Valerie Ouellet, Martin Briggs, Stephanie M. Carlson, Rose Casas-Mulet, Mollie Chapman, Matthias J. Collins, Stephen J. Dugdale, Joseph L. Ebersole, Danielle M. Frechette, Aimee H. Fullerton, Carol-Anne Gillis, Zachary Johnson, Christa Kelleher, Barret L. Kurylyk, Rebecca Lave, Benjamin Letcher, Knut M. Myrvold, Tracie-Lynn Nadeau, Helen Neville, Herve Piégay, Kathryn E. Smith, Diego Tonolla, Christian E. Torgersen
Extent, patterns, and drivers of hypoxia in the world's streams and rivers
Hypoxia in coastal waters and lakes is widely recognized as a detrimental environmental issue, yet we lack a comparable understanding of hypoxia in rivers. We investigated controls on hypoxia using 118 million paired observations of dissolved oxygen (DO) concentration and water temperature in over 125,000 locations in rivers from 93 countries. We found hypoxia (DO < 2 mg L−1) in 12.6% of all river
Authors
Joanna R Blaszczak, Lauren E Koenig, Francine H. Mejia, Alice M. Carter, Lluis Gómez-Gener, Christoper L Dutton, Nancy B. Grimm, Judson Harvey, Ashley M. Helton, Matthew J. Cohen
Keeping an eye on water quality from the sky
You can learn a lot about rivers, lakes, estuaries, and oceans by looking down at them from the sky. Scientists use a technique called remote sensing to measure the amount of light or heat energy reflected and emitted from the Earth. Sensors can be on satellites or mounted on airplanes, helicopters, or drones. Scientists use this information to map the quality of water in the San Francisco Bay-Del
Authors
Francine H. Mejia, Christian E. Torgersen, Cédric G Fichot
Integrating regional and local monitoring data and assessment tools to evaluate habitat conditions and inform river restoration
RRestoring degraded rivers requires initial assessment of the fluvial landscape to identify stressors and riverine features that can be enhanced. We associated local-scale river habitat data collected using standardized national monitoring tools with modeled regional water temperature and flow data on mid-sized northwest U.S. rivers (30–60 m wide). We grouped these rivers according to quartiles of
Authors
Francine H. Mejia, Jason M Connor, Phil R Kaufmann, Christian E. Torgersen, Eric K Berntsen, Todd Andersen
Aquatic ecosystem metabolism as a tool in environmental management
Recent advances in high-frequency environmental sensing and statistical approaches have greatly expanded the breadth of knowledge regarding aquatic ecosystem metabolism - the measurement and interpretation of gross primary productivity (GPP) and ecosystem respiration (ER). Aquatic scientists are poised to take advantage of widely available datasets and freely-available modeling tools to apply func
Authors
Kathi Jo Jankowski, Francine H. Mejia, Joanna Blaszczak, Gordon W. Holtgrieve
Longitudinal, lateral, vertical, and temporal thermal heterogeneity in a large impounded river: Implications for cold-water refuges
Dam operations can affect mixing of the water column, thereby influencing thermal heterogeneity spatially and temporally. This occurs by restricting or eliminating connectivity in longitudinal, lateral, vertical, and temporal dimensions. We examined thermal heterogeneity across space and time and identified potential cold-water refuges for salmonids in a large impounded river in inland northwester
Authors
Francine H. Mejia, Christian E. Torgersen, Eric K Berntsen, Joseph R Maroney, J M Connor, Aimee H. Fullerton, Joseph L. Ebersole, Mark L Lorang
Stream metabolism increases with drainage area and peaks asynchronously across a stream network
Quantifying the spatial and temporal dynamics of stream metabolism across stream networks is key to understanding carbon cycling and stream food web ecology. To better understand intra-annual temporal patterns of gross primary production (GPP) and ecosystem respiration (ER) and their variability across space, we continuously measured dissolved oxygen and modeled stream metabolism for an entire yea
Authors
Francine H. Mejia, Alexander K. Fremier, Joseph R. Benjamin, J. Ryan Bellmore, Adrianne Z. Grimm, Grace A. Watson, Michael Newsom
The response of stream periphyton to Pacific salmon: using a model to understand the role of environmental context
1. In stream ecosystems, Pacific salmon deliver subsidies of marine-derived nutrients and disturb the stream bed during spawning. The net effect of this nutrient subsidy and physical disturbance on biological communities can be hard to predict and is likely to be mediated by environmental conditions. For periphyton, empirical studies have revealed that the magnitude and direction of the response t
Authors
J. Ryan Bellmore, Alexander K. Fremier, Francine Mejia, Michael Newsom
Relation between species assemblages of fishes and water quality in salt ponds and sloughs in South San Francisco Bay
This study was conducted to characterize fishery resources inhabiting salt-evaporation ponds and sloughs in South San Francisco Bay, and to identify key environmental variables that influence distribution of fishes. The ponds, which were originally constructed and operated for commercial production of salt, have undergone preliminary modifications (installation of culverts, gates, and other water-
Authors
F. Mejia, M. K. Saiki, John Y. Takekawa
Smallmouth bass and largemouth bass predation on juvenile Chinook salmon and other salmonids in the Lake Washington basin
We assessed the impact of predation by smallmouth bass Micropterus dolomieu and largemouth bass M. salmoides on juveniles of federally listed Chinook salmon Oncorhynchus tshawytscha and other anadromous salmonid populations in the Lake Washington system. Bass were collected with boat electrofishing equipment in the south end of Lake Washington (February-June) and the Lake Washington Ship Canal (LW
Authors
R.A. Tabor, B.A. Footen, K.L. Fresh, M.T. Celedonia, F. Mejia, D.L. Low, L. Park
Non-USGS Publications**
Mejia F.H., C.V. Baxter, E.K. Berntsen and A.K. Fremier. 2016. Linking groundwater - surface water exchange to food production and salmonid growth. Canadian Journal of Fisheries and Aquatic Sciences. 73:1650-1660.
Mejia F.H. 2016. Understanding Variability of Stream Productivity at Different Scales and Consequences for Aquatic Food Webs. PhD Dissertation, University of Idaho, Moscow, Idaho. 135 pp.
Sommer, T.R., and F.H. Mejia. 2013, A Place to Call Home: A Synthesis of Delta Smelt Habitat in the Upper San Francisco Estuary, San Francisco Estuary and Watershed Science 11(2), 27 p.
Sommer, T.R., F.H. Mejia, K. Hieb, R. Baxter, E. J. Loboschefsky and F.J. Loge. 2011. Long-term shifts in the lateral distribution of age-0 striped bass Morone saxatilis in the San Francisco estuary. Transactions of the American Fisheries Society. 140: 1451-1459
Sommer, T.R., F.H. Mejia, M.L. Nobriga, F. Feyrer; and L. Grimaldo. 2011. The Spawning Migration of Delta Smelt in the Upper San Francisco Estuary. San Francisco Estuary and Watershed Science, 9(2).
Saiki, M.K. and F.H. Mejia. 2009. Fish-Use of the Alviso Island Ponds and Adjacent Waters in South San Francisco Bay Following the Breaching of Earthen Levees. California Fish and Game Journal (95):1-15.
Mejia, F.H. Dominant Lake Erie Prey Fish and their Consumption of Invertebrate Prey: An Energetics Modeling Analysis. M.S. Thesis, SUNY College of Environmental Science and Forestry, December 1997.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
- Science
Updated classifications of flow permanence on streams in the Colville National Forest
The Issue: Streamflow permanence refers to the probability that a stream will lose surface flow (become a dry channel), as well as the timing, duration, and frequency of drying. Patterns of streamflow permanence drive important decisions regarding forest management and other land uses. The Colville National Forest Land and Resource Management Plan (2019), for example, specifies riparian management... - Data
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Distribution, frequency, and global extent of hypoxia in rivers
To assess the distribution, frequency, and global extent of riverine hypoxia, we compiled 118 million paired dissolved oxygen (DO) and water temperature measurements from 125,158 unique locations in rivers in 93 countries and territories across the globe. The dataset also includes site characteristics derived from StreamCat, the National Hydrography and HydroAtlas datasets and proximal land coverFishes of the Harney Basin revisited: A contemporary assessment of the distribution of fish fauna throughout the Harney Basin from 1990 to 2019 (ver. 2.0, April 2022)
We compiled electrofishing and habitat data sampled from 1990 to 2019 in the Harney Basin by the US Geological Survey (USGS), Oregon Department of Fish and Wildlife (ODFW) and the High Desert Partnership (HDP) to describe native and non-native fish distributions and their habitat associations. USGS collected eDNA data in 2019 to refine the known distributions of common carp (Cyprinus carpio). SiteAirborne thermal infrared remote sensing of summer water temperature in the Middle Fork John Day River (Oregon) in 1994-2003
This data release combines seven airborne thermal infrared (TIR) remote sensing data sets of stream temperature collected along the mainstem of the Middle Fork John Day River (MFJD) in Oregon from 1994 to 2003. Years 1994, 1995, 1996, 1998, and 2002 have single datasets. Year 2003 has two data sets. Most of the TIR data covered the upstream half of the MFJD mainstem between river km 50 and 110, whWater temperature data from the Priest River, Idaho, 2018-2019
Water temperature data were collected in summer 2018 and 2019. Temperature data loggers were deployed in tributary confluences and the mainstem of the lower Priest River between Priest Lake Outlet Dam and the confluence with the Pend Oreille River. Data loggers were checked every 2 to 3 weeks throughout the summer. Data for Lagrangian longitudinal thermal profiles were obtained on August 21, 2018Water temperature data from the Pend Oreille River, Washington and Idaho, 2016-2018
The data were collected summer, 2016, 2017, and 2018. Continuous temperature loggers were deployed along the Pend Oreille River between Albeni Falls Dam and the Box Canyon Dam. Loggers were checked every 1-2 weeks throughout the summer. - Multimedia
- Publications
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Fishes of Harney Basin revisited: An assessment of the distribution of native and nonnative fishes over a half century
The Harney Basin is Oregon's largest internally draining basin and contains a unique native fish assemblage. The first and only comprehensive study of the origin and distribution of Harney Basin fishes occurred in 1971. Here, we update this study and identify potential threats to the basin's native fishes a half century later. Our assessment documents that all species of native fishes are still prAuthorsMatthew Laramie, Jason Dunham, Francine H. Mejia, Emily Dawn Heaston, Peter A BissonClosing the gap between science and management of cold-water refuges in rivers and streams
Human activities and climate change threaten coldwater organisms in freshwater ecosystems by causing rivers and streams to warm, increasing the intensity and frequency of warm temperature events, and reducing thermal heterogeneity. Cold-water refuges are discrete patches of relatively cool water that are used by coldwater organisms for thermal relief and short-term survival. Globally, cohesive manAuthorsFrancine H. Mejia, Valerie Ouellet, Martin Briggs, Stephanie M. Carlson, Rose Casas-Mulet, Mollie Chapman, Matthias J. Collins, Stephen J. Dugdale, Joseph L. Ebersole, Danielle M. Frechette, Aimee H. Fullerton, Carol-Anne Gillis, Zachary Johnson, Christa Kelleher, Barret L. Kurylyk, Rebecca Lave, Benjamin Letcher, Knut M. Myrvold, Tracie-Lynn Nadeau, Helen Neville, Herve Piégay, Kathryn E. Smith, Diego Tonolla, Christian E. TorgersenExtent, patterns, and drivers of hypoxia in the world's streams and rivers
Hypoxia in coastal waters and lakes is widely recognized as a detrimental environmental issue, yet we lack a comparable understanding of hypoxia in rivers. We investigated controls on hypoxia using 118 million paired observations of dissolved oxygen (DO) concentration and water temperature in over 125,000 locations in rivers from 93 countries. We found hypoxia (DO < 2 mg L−1) in 12.6% of all riverAuthorsJoanna R Blaszczak, Lauren E Koenig, Francine H. Mejia, Alice M. Carter, Lluis Gómez-Gener, Christoper L Dutton, Nancy B. Grimm, Judson Harvey, Ashley M. Helton, Matthew J. CohenKeeping an eye on water quality from the sky
You can learn a lot about rivers, lakes, estuaries, and oceans by looking down at them from the sky. Scientists use a technique called remote sensing to measure the amount of light or heat energy reflected and emitted from the Earth. Sensors can be on satellites or mounted on airplanes, helicopters, or drones. Scientists use this information to map the quality of water in the San Francisco Bay-DelAuthorsFrancine H. Mejia, Christian E. Torgersen, Cédric G FichotIntegrating regional and local monitoring data and assessment tools to evaluate habitat conditions and inform river restoration
RRestoring degraded rivers requires initial assessment of the fluvial landscape to identify stressors and riverine features that can be enhanced. We associated local-scale river habitat data collected using standardized national monitoring tools with modeled regional water temperature and flow data on mid-sized northwest U.S. rivers (30–60 m wide). We grouped these rivers according to quartiles ofAuthorsFrancine H. Mejia, Jason M Connor, Phil R Kaufmann, Christian E. Torgersen, Eric K Berntsen, Todd AndersenAquatic ecosystem metabolism as a tool in environmental management
Recent advances in high-frequency environmental sensing and statistical approaches have greatly expanded the breadth of knowledge regarding aquatic ecosystem metabolism - the measurement and interpretation of gross primary productivity (GPP) and ecosystem respiration (ER). Aquatic scientists are poised to take advantage of widely available datasets and freely-available modeling tools to apply funcAuthorsKathi Jo Jankowski, Francine H. Mejia, Joanna Blaszczak, Gordon W. HoltgrieveLongitudinal, lateral, vertical, and temporal thermal heterogeneity in a large impounded river: Implications for cold-water refuges
Dam operations can affect mixing of the water column, thereby influencing thermal heterogeneity spatially and temporally. This occurs by restricting or eliminating connectivity in longitudinal, lateral, vertical, and temporal dimensions. We examined thermal heterogeneity across space and time and identified potential cold-water refuges for salmonids in a large impounded river in inland northwesterAuthorsFrancine H. Mejia, Christian E. Torgersen, Eric K Berntsen, Joseph R Maroney, J M Connor, Aimee H. Fullerton, Joseph L. Ebersole, Mark L LorangStream metabolism increases with drainage area and peaks asynchronously across a stream network
Quantifying the spatial and temporal dynamics of stream metabolism across stream networks is key to understanding carbon cycling and stream food web ecology. To better understand intra-annual temporal patterns of gross primary production (GPP) and ecosystem respiration (ER) and their variability across space, we continuously measured dissolved oxygen and modeled stream metabolism for an entire yeaAuthorsFrancine H. Mejia, Alexander K. Fremier, Joseph R. Benjamin, J. Ryan Bellmore, Adrianne Z. Grimm, Grace A. Watson, Michael NewsomThe response of stream periphyton to Pacific salmon: using a model to understand the role of environmental context
1. In stream ecosystems, Pacific salmon deliver subsidies of marine-derived nutrients and disturb the stream bed during spawning. The net effect of this nutrient subsidy and physical disturbance on biological communities can be hard to predict and is likely to be mediated by environmental conditions. For periphyton, empirical studies have revealed that the magnitude and direction of the response tAuthorsJ. Ryan Bellmore, Alexander K. Fremier, Francine Mejia, Michael NewsomRelation between species assemblages of fishes and water quality in salt ponds and sloughs in South San Francisco Bay
This study was conducted to characterize fishery resources inhabiting salt-evaporation ponds and sloughs in South San Francisco Bay, and to identify key environmental variables that influence distribution of fishes. The ponds, which were originally constructed and operated for commercial production of salt, have undergone preliminary modifications (installation of culverts, gates, and other water-AuthorsF. Mejia, M. K. Saiki, John Y. TakekawaSmallmouth bass and largemouth bass predation on juvenile Chinook salmon and other salmonids in the Lake Washington basin
We assessed the impact of predation by smallmouth bass Micropterus dolomieu and largemouth bass M. salmoides on juveniles of federally listed Chinook salmon Oncorhynchus tshawytscha and other anadromous salmonid populations in the Lake Washington system. Bass were collected with boat electrofishing equipment in the south end of Lake Washington (February-June) and the Lake Washington Ship Canal (LWAuthorsR.A. Tabor, B.A. Footen, K.L. Fresh, M.T. Celedonia, F. Mejia, D.L. Low, L. ParkNon-USGS Publications**
Mejia F.H., C.V. Baxter, E.K. Berntsen and A.K. Fremier. 2016. Linking groundwater - surface water exchange to food production and salmonid growth. Canadian Journal of Fisheries and Aquatic Sciences. 73:1650-1660.Mejia F.H. 2016. Understanding Variability of Stream Productivity at Different Scales and Consequences for Aquatic Food Webs. PhD Dissertation, University of Idaho, Moscow, Idaho. 135 pp.Sommer, T.R., and F.H. Mejia. 2013, A Place to Call Home: A Synthesis of Delta Smelt Habitat in the Upper San Francisco Estuary, San Francisco Estuary and Watershed Science 11(2), 27 p.Sommer, T.R., F.H. Mejia, K. Hieb, R. Baxter, E. J. Loboschefsky and F.J. Loge. 2011. Long-term shifts in the lateral distribution of age-0 striped bass Morone saxatilis in the San Francisco estuary. Transactions of the American Fisheries Society. 140: 1451-1459Sommer, T.R., F.H. Mejia, M.L. Nobriga, F. Feyrer; and L. Grimaldo. 2011. The Spawning Migration of Delta Smelt in the Upper San Francisco Estuary. San Francisco Estuary and Watershed Science, 9(2).Saiki, M.K. and F.H. Mejia. 2009. Fish-Use of the Alviso Island Ponds and Adjacent Waters in South San Francisco Bay Following the Breaching of Earthen Levees. California Fish and Game Journal (95):1-15.Mejia, F.H. Dominant Lake Erie Prey Fish and their Consumption of Invertebrate Prey: An Energetics Modeling Analysis. M.S. Thesis, SUNY College of Environmental Science and Forestry, December 1997.**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
- News
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government