Great Lakes Science Center

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Phragmites, an invasive grass
December 31, 2017

Phragmites, an invasive grass

Introduced Phragmites australis, also called the common reed, is an invasive grass in the Great Lakes.

Phragmites rhizome
December 31, 2017

Phragmites rhizome

Phragmites rhizome, or a belowground stem that puts up new shoots, dug up in a coastal marsh of Lake Erie in northern Ohio. Phragmites' belowground biomass can exceed that of its aboveground biomass. 

Sea Lamprey Larvae in Hand
December 31, 2017

Sea Lamprey Larvae in Hand

This image shows a sea lamprey in its larvae phase.

Slower sea lamprey growth rates during the larval phase of development may increase the odds of sea lampreys becoming male, according to a USGS study. Sea lampreys are an invasive, parasitic species of fish damaging the Great Lakes.

Sea Lamprey Larvae on White Background
December 31, 2017

Sea Lamprey Larvae on White Background

This image shows a sea lamprey in its larvae phase.

Slower sea lamprey growth rates during the larval phase of development may increase the odds of sea lampreys becoming male, according to a USGS study. Sea lampreys are an invasive, parasitic species of fish damaging the Great Lakes.

R/V Arcticus at Sturgeon Bay
September 21, 2017

R/V Arcticus at Sturgeon Bay

Fog surrounds the USGS Research Vessel Arcticus as it comes into port at Sturgeon Bay, Wisconsin.

PAMF’s monitoring protocol on a patch near Schoolcraft, Michigan.
August 23, 2017

PAMF’s monitoring protocol on a patch near Schoolcraft, Michigan.

A scientist performing PAMF’s monitoring protocol on a Phragmites patch near Schoolcraft, Michigan.

Autonomous Underwater Vehicle in Lake Huron near Alpena
August 16, 2017

Autonomous Underwater Vehicle in Lake Huron near Alpena

Autonomous Underwater Vehicle (AUV) in Lake Huron near Alpena preparing to dive on a transect.

Lake Sturgeon Eggs
May 22, 2017

Lake Sturgeon Eggs

Lake Sturgeon Eggs

Detroit River Substrate
May 12, 2017

Detroit River Substrate

Detroit River Substrate

Freshwater Sponges in the Detroit River
May 5, 2017

Freshwater Sponges in the Detroit River

Freshwater Sponges in the Detroit River

Large Boulders Detroit
May 5, 2017

Large Boulders with Dreissenid Mussels in the Detroit River

Large Boulders with Dreissenid Mussels in the Detroit River

Expressing lamprey feces
March 6, 2017

Expressing lamprey feces

USGS scientist Nick Johnson isn’t afraid to get dirty. Here he is expressing green feces from a parasitic sea lamprey. DNA in the feces may help USGS scientists discover the identity of sea lamprey’s last meal.