Wetland and Aquatic Research Center

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In UV light an alga from the desmid family looks like a snowflake chain
February 28, 2017

A snowflake chain? Nope. A one-celled green alga.

The desmid family of single-celled green algae are never found in abundance, says USGS biologist Barry Rosen. They inhabit the soft, slightly acidic water of wetlands that depend on rainwater, like Florida’s Arthur R. Marshall Loxahatchee National Wildlife Refuge. They don’t “bloom” en masse, but their presence is an indicator of good water quality. Rosen’s research is

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Manatee Health Assessment
January 31, 2017

Manatee Health Assessment

USGS conducts a health assessment on a mantee in Crystal River, Florida. 

Manatee Health Assessment
January 31, 2017

Manatee Health Assessment

USGS conducts a health assessment on a mantee in Crystal River, Florida.

Manatee Health Assessment
January 31, 2017

Manatee Health Assessment

USGS conducts a health assessment on a mantee in Crystal River, Florida.

Manatee Health Assessment
January 31, 2017

Manatee Health Assessment

USGS conducts a health assessment on a mantee in Crystal River, Florida.

Frosted flatwoods salamander
December 31, 2016

Frosted flatwoods salamander

Frosted flatwoods salamander in St. Marks National Wildlife Refuge, Florida

Frosted flatwoods salamander
December 31, 2016

Frosted flatwoods salamander

Frosted flatwoods salamander, St. Marks National Wildlife Refuge, Florida

Beached boats and bare trees in Hurricane Hole
September 30, 2016

Irma leaves beached boats and broken trees in Huricane Hole

Boat owners sought protection for their vessels in sheltered Hurricane Hole, but Hurricane Irma sunk and beached many boats, likely damaging corals. Photo: Caroline Rogers, USGS, 2017

Newly discovered cavefish species, the Oaxaca Cave Sleeper
June 24, 2016

Oaxaca Cave Sleeper is a newly discovered species

This Oaxaca Cave Sleeper is one of thirteen specimens collected from a cave beneath a reservoir on Mexico's Tonto River. It lacks eyes, is unpigmented, and has sensory adaptations characteristic of fish that live in total darkness. Thuis is the holotype, the example used to describe and name this newly identified species. Credit: Howard L. Jelks and Stephen J. Walsh, USGS

Laboratory specimen of newly-discovered Oaxaca Cave Sleeper
June 24, 2016

A laboratory specimen shows the cavefish's absence of eyes

A laboratory preparation of a Oaxaca Cave Sleeper specimen shows the absence of eyes in this newly identified cavefish species. Credit: Stephen J. Walsh, USGS

WRP Natchitoches Parish, Louisiana
April 26, 2016

WRP Natchitoches Parish, Louisiana

Wetlands Reserve Program site in Natchitoches Parish, Louisiana.  Ten years ago, this landowner worked with the USDA Natural Resources Conservation Service through the Wetlands Reserve Program to design and construct this slough as part of a plan to restore this field’s natural wetland hydrology.

WRP Morehouse Parish, Louisiana
April 26, 2016

WRP Morehouse Parish, Louisiana

Wetlands Reserve Program site in Morehouse Parish, Louisiana.  Green tree frogs rest on a Wetlands Reserve Program easement boundary sign in Morehouse Parish, Louisiana.