By tracking the health and stability of amphibian populations, the Amphibian Research and Monitoring Initiative (ARMI) provides valuable information on environmental relationships and population dynamics.Learn More
Have you seen me? Report sightings of non-native and invasive aquatic plant and animal species to the Nonindigenous Aquatic Species (NAS) information resource.Report Sightings
Coastal Louisiana wetlands make up the seventh largest delta on Earth and support the largest commercial fishery in the lower 48 states. However, Louisiana currently undergoes ~90% of the total coastal wetland loss in the continental U.S.Learn more
Researchers from the U.S. Geological Survey and Louisiana State University have identified a new genus and species of cavefish from Mexico, the Oaxaca Cave Sleeper, which is the first cave-adapted sleeper goby to be found in the Western Hemisphere.
A special edition of the journal Ecological Modelling has been dedicated to Donald DeAngelis, U.S. Geological Survey Research Ecologist, in honor of his 70th birthday. A a prominent contributor to the journal, DeAngelis has played a decisive role in the progression of ecological and mathematical modeling, specifically related to individual-based approaches.
Our transitional site includes the new usgs.gov and more than 180 top-level pages (Mission Areas, Programs, Regions, our three new Science Center websites, Products, Connect, About, etc.). We will migrate more USGS websites into this new experience; check back often to see our progress.
Chytridiomycosis is an emerging disease caused by the fungal pathogen Batrachochytrium dendrobatidis (Bd) that poses a serious threat to frog populations worldwide. Several studies have shown that inoculation of bacterial species Janthinobacterium lividum (Jl) can mitigate the impact of the disease. However, there are many questions regarding this interaction. A mathematical model of a frog...Read More
Caecieleotris morrisi, new genus and species of sleeper (family Eleotridae), is described from a submerged freshwater cave in a karst region of the northern portion of the State of Oaxaca, Mexico, Río Papaloapan drainage, Gulf of Mexico basin. The new species represents the first cave-adapted sleeper known from the Western Hemisphere and is one of only 13 stygobitic gobiiforms known worldwide,...Read More
Pomacea maculata (formerly P. insularum), an apple snail native to South America, was discovered in Louisiana in 2008. These snails strip vegetation, reproduce at tremendous rates, and have reduced rice production and caused ecosystem changes in Asia. In this pilot study snails were exposed to two molluscicides, a tea (Camellia sinensis) seed derivative (TSD) or niclosamide monohydrate (Pestanal...Read More