Toxic Substances Hydrology
Multimedia
One-stop collection of videos, photography, and audio. All items in this gallery are considered public domain unless otherwise noted.
Melanistic and normal areas of fish skin
Microscopic appearance of normal and melanistic skin in fish from Chesapeake Bay watershed.
USGS Hydrologic Technician Collecting Water Samples
USGS Hydrologic Technician assisting with collection of downwelling porewater samples in a PFAS-impacted lake on Cape Cod.
Visitors at Winnewissa Falls viewing area, Pipestone National Monument
Visitors at Winnewissa Falls in Pipestone National Monument
Numerous aquatic macroinvertebrate taxa collected from a stream
Benthic macroinvertebrate taxa collected from Straight Run, Tioga County, Pennsyvania, USA.
Aerial image and satellite derived image of Florida Lakes
This image is a cropped rendition of two aerial images that demonstrate satellite-derived cyanobacteria concentrations in surface waters from an area in Florida. The top image is true-color photograph, and the bottom image is from the Medium Resolution
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A seasonal wetland engineered to have a deeper and shallow pool
A three year study was conducted in seasonal wetlands to determine if a deep and shallow water pool resulted in a reduction of methylmercury in caged fish and surface water.
A seasonal wetland engineered to have a deeper and shallow pool
Graphical depiction of a seasonal wetland engineered to have a deeper pool and more open water on the downstream side of the wetland. This management strategy was tested during a 3-year period to determine if it resulted in a reduction of methylmercury in caged fish and surface water.
Algal bloom magnitude in Florida lakes
(A). Algal bloom magnitude in Florida lakes in 2011 before normalization and (B) after normalization by lake surface area. Area-normalized magnitude (km−2) of selected lakes provided as part of bar labels in parenthesis. Bar height and color are proportional to annual bloom magnitude (in A) and annual area-
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Map of the study region showing the location of lakes in FL and OH
Map of the study region showing the location of lakes in (A) Florida and (B) Ohio. In total, 135 lakes in Florida and 21 lakes in Ohio, were resolvable with the full resolution MERIS data and are used in this study. Land and lakes are shown in gray and blue colors respectively.
Graphical depiction of three sources of variation in methylmercury
Graphical depiction of three sources of variation that can affect accumulation of methylmercury in black rails: habitat (sediment) biogeochemistry, food web structure and biomagnification, and diet composition. Methylmercury moves from the sediment into the wetland food web and accumulates in rail tissues. Rails that consume more prey at higher trophic levels in the food
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