Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5566
Aquatic synthesis for Voyageurs National Park Aquatic synthesis for Voyageurs National Park
Voyageurs National Park (VOYA), which was established in 1975, contains significant aquatic resources with about 50% of its total area of 883 km2 (341 mi2) consisting of aquatic habitats. In addition to the Park's 30 named lakes, there are numerous wetlands including hundreds of beaver ponds. Due to the Park's size and location in the drainage basin, aquatic resources within the Park are
Authors
Larry A. Kallemeyn, Kerry L. Holmberg, Jim A. Perry, Beth Y. Odde
Modeling manifest variables in longitudinal designs - A two-stage approach Modeling manifest variables in longitudinal designs - A two-stage approach
No abstract available
Authors
Bret E. Fuller, Alexander von Eye, P. K. Wood, Bobby D. Keeland
Workshop 3.5: Closing the gap between exposure and effects in monitoring studies Workshop 3.5: Closing the gap between exposure and effects in monitoring studies
A major challenge to contaminant monitoring programs is the selection of an appropriate suite of measurements for assessing exposure and effects. Early monitoring programs relied solely on residue analysis to detect the organochlorine compounds that were in use at that time. A shift to the use of more transient, less persistent chemicals required that a new set of tools be developed to...
Authors
Donald E. Tillitt, Diana M. Papoulias
Survival, transport, and sources of fecal bacteria in streams and survival in land-applied poultry litter in the upper Shoal Creek basin, southwestern Missouri, 2001–2002 Survival, transport, and sources of fecal bacteria in streams and survival in land-applied poultry litter in the upper Shoal Creek basin, southwestern Missouri, 2001–2002
Densities of fecal coliform bacteria along a 5.7-mi (mile) reach of Shoal Creek extending upstream from State Highway 97 (site 3) to State Highway W (site 2) and in two tributaries along this reach exceeded the Missouri Department of Natural Resources (MDNR) standard of 200 col/100 mL (colonies per 100 milliliters) for whole-body contact recreation. A combination of techniques was used...
Authors
John G. Schumacher
Heavy metals and metalloids in egg contents and eggshells of passerine birds from Arizona Heavy metals and metalloids in egg contents and eggshells of passerine birds from Arizona
Concentrations of inorganic elements were determined in eggs of passerine birds including the endangered southwestern willow flycatcher (Empidonax traillii extimus) from four regions in Arizona. The main aim of the study was to determine the distribution of metals in egg contents and eggshells, with emphasis on the deposition of Sr in eggshells. Seventy eggs of 11 passerine species were...
Authors
Miguel A. Mora
Genotype and elevation influence Spartina alterniflora colonization and growth in a created salt marsh Genotype and elevation influence Spartina alterniflora colonization and growth in a created salt marsh
Colonization, growth, and clonal morphology differ with genotype and are influenced by elevation. Local adaptation of Spartina alterniflora to environmental conditions may lead to dominance by different suites of genotypes in different locations within a marsh. In a constructed marsh, we found reduced colonization in terms of density of clones with increasing distance from edge in a 200...
Authors
C.E. Proffitt, S.E. Travis, K.R. Edwards
The interactive effects of UV-B and insecticide exposure on tadpole survival, growth and development The interactive effects of UV-B and insecticide exposure on tadpole survival, growth and development
Because declines within amphibian populations can seldom be attributed to a single cause, it is important to focus on multiple stressors, both natural and anthropogenic. Variables such as UV-B radiation and chemical contamination can interact with one another in ways that might not be predicted from single-factor studies. We exposed southern leopard frog (Rana sphenocephala) tadpoles to...
Authors
Christine M. Bridges, Michelle D. Boone
Geographic distribution: Osteopilus septentrionalis (Cuban Treefrog) Geographic distribution: Osteopilus septentrionalis (Cuban Treefrog)
No abstract available.
Authors
S. A. Johnson, J.S. Staiger, W.J. Barichivich, S. Barlow
Natural history notes: Terrapene carolina bauri (Florida Box Turtle). Rehydration Natural history notes: Terrapene carolina bauri (Florida Box Turtle). Rehydration
Abstract not supplied at this time
Authors
C.K. Dodd, Marian L. Griffey
Turquoise water, silver palms and fluorescent green Leiocephalus Turquoise water, silver palms and fluorescent green Leiocephalus
Abstract not supplied at this time
Authors
C.K. Dodd