Images

USGS scientists evaluating the nebulizer assembly in a mixed mode ionization source of a triple quadrupole mass spectrometer used to measure individual cyanotoxins

Native birds resting on marker buoys in Brownlee Reservoir, Idaho.

Molecular Devices ImageXpress^† High-Content Imaging System that can generate more than 25,000 images in less than 5 hours of automated image acquisition.

Keith A. Loftin, USGS, is the lead scientist for algal and cyanobacterial toxins

Using the 384-well plate format, a single zebrafish embryo is tested in each well. This is an example of a 72 hour post fertilization fli1:egfp zebrafish (3 millimeters long) imaged under a fluorescein isothiocyanate (FITC) filter.

U.S. Geological Survey (USGS) scientist working on data analysis of cyanotoxins in water samples

Microscopic video imaging is used for computerized analysis of sperm motility parameters

Photograph of the entrance to Grand Traverse Bay Harbor, located 8 kilometers downdrift of the spoils pile. Migration of the dark-colored stamp sands (moving from left to right) has buried the original beach, overtopped the wall, and partially blocked the channel.

Between 2009 and 2018, scientists conducted a national scale assessment of mercury accumulation in the National Park System using dragonfly larvae as biosentinels (species that accumulate a pollutant in their tissues as an index of exposure to other organisms without significant adverse effects to the biosentinel) through a citizen science network called the Dragonf

Cover of the 2018 publication, "California’s Fourth Climate Change Assessment: Statewide Summary Report."

This image shows citizen scientists along with National Park Service personnel identifying invertebrates as part of the Dragonfly Mercury Project.

After 100 years of restricted tidal activity to support agricultural use and salt harvesting, the tidal marshes around San Francisco Bay, like this one at Bair Island, are steadily rebuilding, returning to a stunning mosaic of marsh, mudflat, and channels.

Citizen scientists after a day of collecting dragonfly larvae for the Dragonfly Mercury Project.

A U.S.

High-Content Screening Laboratory -- Columbia, Missouri

This is an example of a 72 hour post fertilization fli1:egfp zebrafish (3 millimeters long) imaged under transmitted light. The same imaging system with was used.

Behavioral Toxicology Laboratory -- Columbia, Missouri. Swimming paths of control (left) and copper (right) exposed fish

Behavioral Toxicology Laboratory — Columbia, Missouri. Swimming paths of control (left) and copper (right) exposed fish demonstrate changes in swimming behavior detected following exposure to metals. Such changes can impact ability of fish to survive.

The zebrafish developmental cardiovascular toxicity high-content screening assay uses a 384-well plate format to maximize number of treatments and replicates possible on each plate.

Multimode, microplate reader

High-Content Screening Laboratory — Columbia, Missouri. Molecular Devices ImageXpress^† High-Content Imaging System