Filter Total Items: 234
Date published: March 22, 2017
Status: Completed

Spring Fish Slam 2017 – Big Cypress

22-23 March 2017 - Ten teams of fishery biologists sampled 28 sites amid unexpected wildfires in the Big Cypress National Preserve over the two day period. On the second day a reporter from the Miami Herald accompanied a ground crew team.

Date published: March 16, 2017
Status: Active

Florida Non-Native Fish Action Alliance

Dozens of species of non-native fishes are present in the freshwaters of Florida, and new species are discovered each year. Maintaining current information on the geographic ranges of all non-native fishes is a daunting task, as many jurisdictions are involved at the state, federal, and municipal levels. There is a need to coordinate sampling, research and management across jurisdictional...

Date published: March 14, 2017

Quantitative Analysis Using Structural Equation Modeling

USGS scientists have been involved for a number of years in the development and use of Structural Equation Modeling (SEM). This methodology represents an approach to statistical modeling that focuses on the study of complex cause-effect hypotheses about the mechanisms operating in systems. SEM is increasingly used in ecological and environmental studies and this site seeks to provide...

Date published: January 30, 2017

Streamflow Alteration Assessments to Support Bay and Estuary Restoration in Gulf States

Human alteration of waterways has impacted the minimum and maximum streamflows in more than 86% of monitored streams nationally and may be the primary cause for ecological impairment in river and stream ecosystems. Restoration of freshwater inflows can positively affect shellfish, fisheries, habitat, and water quality in streams, rivers, and estuaries. Increasingly, state and local decision-...

Date published: January 25, 2017

Turbidity Monitoring in Tennessee

A study involving suspended-sediment and turbidity monitoring at streamgaging stations near the segment of State Route 840 under construction between Fairview and Bending Chestnut. 

Contacts: W Scott Gain
Date published: January 25, 2017

Tennessee River (TENN) Basin Study

The Tennessee (TENN) River Basin encompasses an area of 40,890 square miles, making it the largest tributary to the Ohio River. The Tennessee River flows through portions of seven states: Virginia, North Carolina, Tennessee, Alabama, Georgia, Mississippi, and Kentucky. To learn more please visit:

Contacts: W Scott Gain
Date published: January 19, 2017

Regional Hydraulic Geometry Characteristics of the Boston Mountains in Arkansas

LMG-WSC hydrologist, in collaboration with Arkansas Natural Resource Commission scientist are analyzing stream channel geomorphic characteristics at 15 gaged stable stream sites in the Boston Mountains of Arkansas. Field data collection entails topographic surveys of selected stream reaches and analysis of bed and bar sediments. Topographic surveys, running from hundreds to thousands of feet,...

Contacts: Aaron L Pugh
Date published: December 13, 2016

Mississippi Alluvial Plain (MAP): Water Availability Study

The Mississippi Alluvial Plain is one of the most productive agricultural regions in the Nation and depends on groundwater for irrigation. The MAP area constitutes the third largest area of irrigated cropland in the United States. The area is approximately 29,000 square miles (19 million acres) and includes parts of the States...

Contacts: Wade Kress
Date published: December 5, 2016
Status: Active

WaterSMART: Apalachicola/Chattahoochee/ Flint River (ACF) Basin

The Challenge: The DOI WaterSMART (Sustain and Manage America’s Resources for Tomorrow) initiative is developing data and tools to help water managers identify current and future water shortages, for humans and for freshwater ecosystems. Fishes, for example, can decline in diversity and abundance when streamflow becomes too low, for too long.  However, ecologists find that effects of declining...

Date published: December 4, 2016

Biology, Impacts and Control of Invasive Reptiles

Invasive species are considered to be second only to habitat degradation in terms of negative impacts on the Earth’s ecosystems, and our scientists make up a significant proportion of the global expertise in the rapidly-growing problem of invasive reptiles.

Date published: December 2, 2016

USGS Everglades Research Offices - Florida

The Daniel Beard Center in Everglades National Park provides the base for most of the field work done on the control of invasive reptiles by USGS Fort Collins Science Center staff. The team works in Everglades National Park, Big Cypress National Preserve, Crocodile Lake National Wildlife Refuge, and other parts of the Greater Everglades Ecosystem focusing on, among other species of concern,...

Date published: November 1, 2016
Status: Completed

Fish Slam - Fall 2016

November 1 - 2, 2016 – Eight teams of fishery biologists from the US Geological Survey (USGS), US Fish and Wildlife Service - Peninsular Florida Fisheries Office and Welaka National Fish Hatchery (USFWS), the National Park Service (NPS), Florida Fish and Wildlife Conservation Commission (FWC), Florida International University (FIU), and Zoo Miami sampled 20 sites for non-native fishes in Palm...