Images

In Lake Erie, a USGS scuba diver swims with a smallmouth bass (Micropterus dolomieu) who is curious about the diver’s algae and mussel collections. Photo credit: Madeleine Giordano, USGS.

An ichthyoplankton net sample within a collection bucket from the Sandusky River in May of 2022. Grass carp (Ctenopharyngodon idella) eggs are pictured in the foreground (semi-transparent spheres). Photo Credit: James Roberts, USGS

The Lake Erie Biological Station, a field station of the Great Lakes Science Center, moved from Sandusky Ohio to a new building in Huron Ohio in March 2022.

This map is an updated bedrock topography map for the eastern extent of the Lafayette Bedrock Valley System in Indiana and Ohio which depicts a portion of an ancient river drainage valley. This image is used with the permission of the Indiana Geological and Water Survey and the Ohio Department of Natural Resources, Division of Geological Survey. 

Sediments swirl in Lake Erie and Lake St. Clair in this Landsat 9 image of both Detroit, Michigan, and Windsor, Ontario, from Oct. 31, 2021. The Great Lakes serve as sources of freshwater, recreational activity, transport, and habitat for the upper-midwestern US, and water quality remains a high priority. 

A Phragmites australis stand at Crane Creek in the Ottawa National Wildlife Refuge, Ohio. P. australis is an invasive species in North America.

Phragmites invades coastal wetland in a changing climate. Ottawa National Wildlife Refuge, Oak Harbor, OH. Photo Credit: Kurt Kowalski, USGS-GLSC.

A USGS field team member retrieving the sample bottle from a time-based sampler onsite at a wastewater treatment facility.

This map details the subsurface contact between the consolidated Paleozoic bedrock surface and the overlying unconsolidated Quaternary-aged sediments. This image is used with the permission of the Ohio Department of Natural Resources, Division of Geological Survey and the Indiana Geological and Water Survey. 

Landscape view of two researchers walking through the emergent vegetation zone of a Great Lakes coastal wetland. Photo Credit: Alexandra (Sasha) Bozimowski, USGS.

Vessels like this use various sampling methods to collect fish at all life stages, adult, larvae, and eggs.

Nicole King (University of Toledo graduate student) holding a Grass Carp. The Ohio Department of Natural Resources and Michigan State University responded to a report from a commercial fisherman that grass carp were being captured in the Sandusky River. Researchers captured, tagged, and released grass carp to track their movements.

Vermillion River near Vermillion OH - frozen waterfall

A curious young raccoon peers in on GLSC researchers as they walk through a wetland in Ohio on the way to a study site.

Sheldon Marsh State Nature Preserve, near Sandusky Ohio taken on 30 July 2020 for the GLSC Photo Challenge

Map of the super gage site locations in Ohio, Kentucky, and Indiana

These images show grass carp larvae from the Maumee River. Characteristics of larval grass carp include overall length (left), skeletal muscle development (center) and presence of an eye spot that lacks pigmentation (right; pigment starting to develop on lower eye).

A pectoral spine cross section from invasive grass carp captured in the Great Lakes. These cross sections are used to determine the age of the fish.

Cross section of a fish vertebra. Useful for determining the age of a fish.

GSLC research fish biologist, Dr. Ed Roseman, delivers a plenary address at the Great Lakes Areas of Concern (AOC) conference on September 11-12, 2019.

USGS scientists never stop learning! In this photo USGS Hydrologic Technician Charles Hart (USGS Ohio-Kentucky-Indiana Water Science Center) teaches USGS groundwater field personnel about measuring groundwater levels following USGS groundwater field procedures.