A view of the study area of Pool 13 of the Upper Mississippi River on a calm day from Eagle Point Park in Clinton, IA.
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Pool 13 study area from Eagle Point Park
A view of the study area of Pool 13 of the Upper Mississippi River on a calm day from Eagle Point Park in Clinton, IA.
Cruising down the Kalamazoo River
Angus Vaughan (USGS Upper Midwest Environmental Sciences Center, right) and Heidi Broerman (USGS Upper Midwest Water Science Center, left) pilot a research vessel down the Kalamazoo River, Michigan toward a reference reach where riverbed substrate will be characterized.
Angus Vaughan (USGS Upper Midwest Environmental Sciences Center, right) and Heidi Broerman (USGS Upper Midwest Water Science Center, left) pilot a research vessel down the Kalamazoo River, Michigan toward a reference reach where riverbed substrate will be characterized.
ADCP data of the St. Croix River, near Franconia, Minnesota, in May 2021
Figure 4. River current velocities captured on the St. Croix River, near Franconia, Minnesota, in May 2021.
Figure 4. River current velocities captured on the St. Croix River, near Franconia, Minnesota, in May 2021.
eDNA sample collection
USGS volunteer Liliana uses a syringe to draw an eDNA sample from a rock pool along the Puka Stream. The eDNA sampled by USGS field crews informs research on invasive mosquito population dynamics.
USGS volunteer Liliana uses a syringe to draw an eDNA sample from a rock pool along the Puka Stream. The eDNA sampled by USGS field crews informs research on invasive mosquito population dynamics.
"Carp"e Diem!
USGS scientist Andres Fritts holding a telemetered invasive bighead carp on the Mississippi River near Keokuk, Iowa.
USGS scientist Andres Fritts holding a telemetered invasive bighead carp on the Mississippi River near Keokuk, Iowa.
Grassland at the Upper Midwest Environmental Sciences Center
Prairie grassland flowers on the Upper Midwest Environmental Sciences Center campus, with USGS silos pictured in the background.
Prairie grassland flowers on the Upper Midwest Environmental Sciences Center campus, with USGS silos pictured in the background.
MC-ICP-MS used for mercury stable isotope analyses
MC-ICP-MS used for mercury stable isotope analyses.
MC-ICP-MS used for mercury stable isotope analyses.
Nippon mercury analyzer for sediments and fish
Nippon mercury analyzer for sediments and fish.
Nippon mercury analyzer for sediments and fish.
USGS and Partners install Underwater Acoustic Deterrent System in Lock 19 on the Mississippi River
linkScientists at the U.S. Geological Survey Upper Midwest Environmental Sciences Center and the U.S.
USGS and Partners install Underwater Acoustic Deterrent System in Lock 19 on the Mississippi River
linkScientists at the U.S. Geological Survey Upper Midwest Environmental Sciences Center and the U.S.
Graduate student performing mercury uptake studies in plankton
Graduate student, Grace Armstrong, performing mercury uptake studies in plankton at Mercury Research Laboratory, Middleton, Wisconsin.
Graduate student, Grace Armstrong, performing mercury uptake studies in plankton at Mercury Research Laboratory, Middleton, Wisconsin.
Sediment core sample taken at Grubers Grove Bay Wisconsin
Sediment core sample taken at Grubers Grove Bay on the Wisconsin River, Wisconsin.
Sediment core sample taken at Grubers Grove Bay on the Wisconsin River, Wisconsin.
Mercury research team collecting fish in Everglades
USGS Mercury research team collecting fish in Everglades National Park, Florida.
USGS Mercury research team collecting fish in Everglades National Park, Florida.
Panoramic view of sampling site in Everglades
Panoramic view of USGS employees at a sampling site in Florida Everglades.
Panoramic view of USGS employees at a sampling site in Florida Everglades.
Filtration of water in the field at Everglades
Scientists filtering water in the field at Everglades National Park, Florida.
Scientists filtering water in the field at Everglades National Park, Florida.
Internal look at the MC-ICP-MS flight tube when magnet is removed
Internal look at the MC-ICP-MS flight tube when magnet is removed.
Internal look at the MC-ICP-MS flight tube when magnet is removed.
Row of lab bubblers sample purging prior to analysis
Row of lab bubblers sample purging prior to analysis at the Mercury Research Laboratory in Middleton, WI.
Row of lab bubblers sample purging prior to analysis at the Mercury Research Laboratory in Middleton, WI.
Methylmercury photodecomposition experiment on the roof of building
Methylmercury photodecomposition experiment on the roof of USGS building in Middleton, WI.
Methylmercury photodecomposition experiment on the roof of USGS building in Middleton, WI.
Erie pier pond in the Saint Louis River estuary in Duluth, MN
Erie pier pond in the Saint Louis River estuary in Duluth, MN.
Erie pier pond in the Saint Louis River estuary in Duluth, MN.
Wild celery in Pool 13 of the Upper Mississippi River
Wild celery (Vallisneria americana) within lower Pool 13 of the Upper Mississippi River.
Prevalence of submersed aquatic vegetation, especially wild celery, increased from 1998 to 2008 but has since declined in Pool 13.
Wild celery (Vallisneria americana) within lower Pool 13 of the Upper Mississippi River.
Prevalence of submersed aquatic vegetation, especially wild celery, increased from 1998 to 2008 but has since declined in Pool 13.
USGS scientist measuring sediment pH
USGS scientist measuring sediment pH in a sample taken from a tributary of the Maumee River in Ohio
USGS scientist measuring sediment pH in a sample taken from a tributary of the Maumee River in Ohio
Assessing soil sampling locations at the Badger Army Ammunition Plant
Scientist in field assessing soil sampling locations at the Badger Army Ammunition Plant site in Sauk County, WI.
Scientist in field assessing soil sampling locations at the Badger Army Ammunition Plant site in Sauk County, WI.