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Region 4: Mississippi Basin

Welcome to the Mississippi Basin Region! Our streamgage network is used to monitor and assess water resources across the region. Other research focuses on fisheries and aquatic ecosystems, midcontinental plant/animal species, invasive species, wildlife disease, and energy and mining.

News

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David Applegate Sworn In as Director of the U.S. Geological Survey

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The 2022 Atlantic Hurricane Season is Here

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From the Seafloor to Outer Space, USGS is on the Case

Publications

From bottom-up to top-down control of invertebrate herbivores in a retrogressive chronosequence

In the long-term absence of disturbance, ecosystems often enter a decline or retrogressive phase which leads to reductions in primary productivity, plant biomass, nutrient cycling and foliar quality. However, the consequences of ecosystem retrogression for higher trophic levels such as herbivores and predators, are less clear. Using a post-fire forested island-chronosequence across which retrogres

United States Gulf of Mexico waters provide important nursery habitat for Mexico’s green turtle nesting populations

Resolving natal populations for juvenile green turtles is challenging given their potential for extensive dispersal during the oceanic stage and ontogenetic shifts among nursery habitats. Mitochondrial DNA markers have elucidated patterns of connectivity between green turtle nesting populations (rookeries) and juvenile foraging aggregations. However, missing rookery baseline data and haplotype sha

Ecotoxicological studies indicate that sublethal and lethal processes limit insect-mediated contaminant flux

Merolimnic insects can accumulate and transport considerable amounts of aquatic contaminants to terrestrial systems. The rate of contaminant biotransport, termed insect-mediated contaminant flux (IMCF), depends on emergent insect biomass and contaminant accumulation, both functions of environmental concentration. Here we develop a mathematical model of IMCF and apply it to three ecotoxicological s

Science

Mapping Avian Habitat for the Gulf Coast Joint Venture

The Gulf Coast Joint Venture (GCJV) was established in 1988 as a result of the North American Waterfowl Management Plan, which espouses the restoration of continental waterfowl populations through conservation partnerships in priority habitat regions. Since that time GCJV partners have expanded their mission and purpose to include the provision of habitat to support other priority bird species...
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Mapping Avian Habitat for the Gulf Coast Joint Venture

The Gulf Coast Joint Venture (GCJV) was established in 1988 as a result of the North American Waterfowl Management Plan, which espouses the restoration of continental waterfowl populations through conservation partnerships in priority habitat regions. Since that time GCJV partners have expanded their mission and purpose to include the provision of habitat to support other priority bird species...
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Department of Interior the Natural Resource Conservation Achievement Award for FY19-20 for efforts associated with the Monarch Conservation Science Partnership

Congratulations to the Monarch Conservation Science Partnership for receiving a 2020 Department of the Interior Natural Resource Conservation Achievement Award. The Team received this award in the Trailblazer category for efforts to address concerns related to the Monarch butterfly including conducting extinction risk research to establish the minimum overwintering population size required to...
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Department of Interior the Natural Resource Conservation Achievement Award for FY19-20 for efforts associated with the Monarch Conservation Science Partnership

Congratulations to the Monarch Conservation Science Partnership for receiving a 2020 Department of the Interior Natural Resource Conservation Achievement Award. The Team received this award in the Trailblazer category for efforts to address concerns related to the Monarch butterfly including conducting extinction risk research to establish the minimum overwintering population size required to...
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USGS Safety and Occupational Health Award of Excellence Individual Awardee

Randy Hines with the Upper Midwest Environmental Sciences Center (UMESC) has assisted in developing an outstanding safety program. As the Center’s Collateral Duty Safety Program Coordinator (CDSPC), he coordinates the Center safety program, industrial hygiene monitoring, and employee safety training. Randy maintains the Center’s safety plans and ensures each employee has created a personal hazard...
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USGS Safety and Occupational Health Award of Excellence Individual Awardee

Randy Hines with the Upper Midwest Environmental Sciences Center (UMESC) has assisted in developing an outstanding safety program. As the Center’s Collateral Duty Safety Program Coordinator (CDSPC), he coordinates the Center safety program, industrial hygiene monitoring, and employee safety training. Randy maintains the Center’s safety plans and ensures each employee has created a personal hazard...
Learn More