Wetland and Aquatic Research Center

Multimedia

Explore WARC's multimedia resources.

Filter Total Items: 81
A Cuban treefrog on a green leaf
November 13, 2017

Cuban treefrogs have leaped into Louisiana

Non-native Cuban treefrogs have established a breeding population in New Orleans, Louisiana, the first such population on the U.S. mainland outside Florida. The treefrogs were discovered at the Audubon Zoo shortly after a shipment of palm trees from Florida were planted in the zoo's elephant enclosure in 2016. USGS scientist Brad Glorioso confirmed the presence of a

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Map of offshore survey sites from Virginia to Georgia
September 12, 2017

Areas to be surveyed on first Deep SEARCH research cruise

Map of target areas to be surveyed during the first phase of the Deepwater Atlantic Habitats II study, 
DEEP SEARCH, including seep targets. USGS image.

Map of offshore survey sites from Virginia to Georgia
September 12, 2017

Study area for first Deep SEARCH research cruise

Map of target areas to be surveyed during the first phase of the 
Deepwater Atlantic Habitats II study,  DEEP SEARCH, including seep targets. USGS image.

Photomicrograph of a green desmid alga resembling a holiday ornament
August 31, 2017

A natural marvel in a single cell

This single-celled freshwater algae wasa collected as part of the first-ever study of the green algae family called desmids in Florida’s Loxahatchee National Wildlife Refuge, in the northern Everglades. USGS biologist Barry H. Rosen, an expert on freshwater algae who leads the study, used a technique called differential interference microscopy to highlight the relief of

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chart of vegetation change in the bird's foot delta
July 31, 2017

Changing vegetation in the Delta 2016-2017

Chart showing changes in vegetation density in the Mississippi River delta in Louisiana, May 2015-May 2016. From a USGS Open File Report published in July 2017 by co-authors Elijah Ramsey III and Amina Rangoonwala,

Aerial view of southeast Louisiana coastal marshes
July 10, 2017

Louisiana's Coastal Wetland Loss Rate Continues to Slow

An aerial view of southeast Louisiana coastal marshes. 

Satellite images of the same marsh in 2008 and 2016
July 10, 2017

Restoration projects help some Louisiana coastal wetlands rebuild

Satellite images of the same wetland taken in 2008 and 2016 show a wetland restoration project has produced some gains in marsh area.

Map shows early wetland losses in red, recent losses in purple
July 10, 2017

Map shows early wetland losses in red, recent losses in purple

This map shows the historic trend in wetland losses, with early losses in red and the most recent ones in purple.

Phragmites under stress in Pass A Loutre, Louisiana
May 31, 2017

High stakes, big questions in marsh grass die-back

Brown patches and brown stems show stress in this phagmites (roseau cane) stand in Pass A Loutre Wildlife Management Area, a tract of state-owned land in Louisiana's bird foot delta, where the Mississippi River meets the Gulf of Mexico. An ongoing phragmites was first discovered in spring 2017 and blamed on an invasive scale insect from Asia. But a new USGS report, based

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Scientist holding a laptop and equipment, standing in a green field.
April 30, 2017

Assessing Tallgrass Coastal Prairie in Southwest Louisiana

Vegetation assessments are part of an effort to produce seamless, consistent, and high resolution landcover data for the northern portion of the western gulf coastal plain. This geography was once dominated by tallgrass prairie and has undergone dramatic change with less than 1% of this natural habitat in existence.

Tallgrass prairie provides a suite of ecosystem

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Three sailfin catfish found in the Big Cypress National Preserve
March 23, 2017

Sailfin catfishes discovered in Big Cypress

The sailfin catfish is one of 13 species of nonnative fish that biologists discovered during the Fish Slam in Big Cypress National Preserve, March 23, 2017.

 

Pike killifish found in Big Cypress
March 23, 2017

Non-native pike killifish from the Big Cypress

The pike killifish, native to Mexico and Central America, was one of 13 nonnative fish species that biologists discovered during the two-day Fish Slam in Big Cypress National Preserve, March 22 and 23, 2017.