Publications
Publications
Here you will find publications, reports and articles produced by Lower Mississippi-Gulf scientists. For a comprehensive listing of all USGS publications please click the button below.
Filter Total Items: 422
Soil microbial community profiles and functional diversity in limestone cedar glades
Rock outcrop ecosystems, such as limestone cedar glades (LCGs), are known for their rare and endemic plant species adapted to high levels of abiotic stress. Soils in LCGs are thin (< 25 cm), soil-moisture conditions fluctuate seasonally between xeric and saturated, and summer soil temperatures commonly exceed 48 °C. The effects of these stressors on soil microbial communities (SMC) remain largely
Authors
Jennifer M. Cartwright, E. Kudjo Dzantor, Bahram Momen
Water resources of Livingston Parish, Louisiana
Information concerning the availability, use, and quality of water in Livingston Parish, Louisiana, is critical for proper water-resource management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. Information on the availability, past and current use, use trends, and water quality fro
Authors
Vincent E. White, Lawrence B. Prakken
Water resources of St. Helena Parish, Louisiana
Information concerning the availability, use, and quality of water in St. Helena Parish, Louisiana, is critical for proper water-resource management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. Information on the availability, past and current use, use trends, and water quality fro
Authors
Vincent E. White, Lawrence B. Prakken
Water resources of Tangipahoa Parish, Louisiana
Information concerning the availability, use, and quality of water in Tangipahoa Parish, Louisiana, is critical for proper water-resource management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. Information on the availability, past and current use, use trends, and water quality fro
Authors
Vincent E. White, Lawrence B. Prakken
Macroinvertebrate and diatom metrics as indicators of water-quality conditions in connected depression wetlands in the Mississippi Alluvial Plain
Methods for assessing wetland conditions must be established so wetlands can be monitored and ecological services can be protected. We evaluated biological indices compiled from macroinvertebrate and diatom metrics developed primarily for streams to assess their ability to indicate water quality in connected depression wetlands. We collected water-quality and biological samples at 24 connected dep
Authors
Billy Justus, David Burge, Jennifer Cobb, Travis Marsico, Jennifer Bouldin
Water-quality data and Escherichia coli predictions for selected karst catchments of the upper Duck River watershed in central Tennessee, 2007–10
The U.S. Geological Survey, in cooperation with the Tennessee Duck River Development Agency, monitored water quality at several locations in the upper Duck River watershed between October 2007 and September 2010. Discrete water samples collected at 24 sites in the watershed were analyzed for water quality, and Escherichia coli (E. coli) and enterococci concentrations. Additional analyses, includin
Authors
Jennifer C. Murphy, James Farmer, Alice Layton
Water resources of Washington Parish, Louisiana
Information concerning the availability, use, and quality of water in Washington Parish, Louisiana, is critical for proper water-resource management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. Information on the availability, past and current use, use trends, and water quality fro
Authors
Vincent E. White, Lawrence B. Prakken
Effects of hydrology, watershed size, and agricultural practices on sediment yields in two river basins in Iowa and Mississippi
The specific sediment yield (SSY) from watersheds is the result of the balance between natural, scale-dependent erosion and deposition processes, but can be greatly altered by human activities. In general, the SSY decreases along the course of a river as sediments are trapped in alluvial plains and other sinks. However, this relation between SSY and basin area can actually be an increasing one whe
Authors
Gustavo Henrique Merten, Heather L. Welch, M.D. Tomer
Potentiometric surfaces of the Arnold Engineering Development Complex Area, Arnold Air Force Base, Tennessee, May and September 2011
Arnold Air Force Base occupies about 40,000 acres in Coffee and Franklin Counties, Tennessee. The primary mission of Arnold Air Force Base is to provide risk-reduction information in the development of aerospace products through test and evaluation. This mission is achieved in part through test facilities at Arnold Engineering Development Complex (AEDC), which occupies about 4,000 acres in the cen
Authors
Connor J. Haugh, John A. Robinson
Water-quality effects on phytoplankton species and density and trophic state indices at Big Base and Little Base Lakes, Little Rock Air Force Base, Arkansas, June through August, 2015
Big Base and Little Base Lakes are located on
Little Rock Air Force Base, Arkansas, and their close
proximity to a dense residential population and an
active military/aircraft installation make the lakes
vulnerable to water-quality degradation. The U.S.
Geological Survey (USGS) conducted a study from
June through August 2015 to investigate the effects of
water quality on phytoplankton speci
Authors
Lucas Driver, Billy Justus
Nutrient-enhanced decomposition of plant biomass in a freshwater wetland
We studied soil decomposition in a Panicum hemitomon (Schultes)-dominated freshwater marsh located in southeastern Louisiana that was unambiguously changed by secondarily-treated municipal wastewater effluent. We used four approaches to evaluate how belowground biomass decomposition rates vary under different nutrient regimes in this marsh. The results of laboratory experiments demonstrated how nu
Authors
James E. Bodker, Robert Eugene Turner, Andrew Tweel, Christopher Schulz, Christopher M. Swarzenski
Discharge, suspended sediment, and salinity in the Gulf Intracoastal Waterway and adjacent surface waters in South-Central Louisiana, 1997–2008
Discharge, suspended sediment, and salinity data collected between 1997 and 2008 indicate that the Gulf Intracoastal Waterway (GIWW) is an important distributary of river water and suspended sediments to coastal wetlands in south-central coastal Louisiana. Following natural hydraulic gradients, the GIWW passively distributes freshwater and suspended sediments from the Atchafalaya River to areas at
Authors
Christopher M. Swarzenski, Scott M. Perrien