Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10361
Selected hydrogeologic datasets for the Ogallala Aquifer, Texas Selected hydrogeologic datasets for the Ogallala Aquifer, Texas
No abstract available.
Authors
Natalie A. Houston, C. Amanda Garcia, Eric W. Strom
Selected hydrogeologic datasets for the Chicot Aquifer, Texas Selected hydrogeologic datasets for the Chicot Aquifer, Texas
No abstract available.
Authors
Eric W. Strom, Natalie A. Houston, C. Amanda Garcia
Quality of sediment discharging from the Barton Springs system, Austin, Texas, 2000-2002 Quality of sediment discharging from the Barton Springs system, Austin, Texas, 2000-2002
Four spring outlets of the Barton Springs system provide the only known habitat for the Barton Springs salamander (Eurycea sosorum), a federally listed endangered species. After heavy rainfall, sediment is flushed through the Barton Springs segment of the Edwards aquifer and springflow often becomes turbid (cloudy). Sediment in urban areas often has high concentrations of hydrophobic...
Authors
Barbara Mahler
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
Modeling manatee response to restoration in the Everglades and Ten Thousand Islands Modeling manatee response to restoration in the Everglades and Ten Thousand Islands
No abstract available.
Authors
Bradley Stith, James P. Reid, Dean E. Easton, Susan M. Butler
Movements and habitat requirements of radio tagged manatees in southwest Florida: Implications for restoration assessment Movements and habitat requirements of radio tagged manatees in southwest Florida: Implications for restoration assessment
No abstract available.
Authors
J.P. Reid, Susan M. Butler, Dean E. Easton, Bradley Stith
The importance of spatial scale in the modeling of aquatic ecosystems: Chapter 24 The importance of spatial scale in the modeling of aquatic ecosystems: Chapter 24
No abstract available
Authors
Donald L. DeAngelis, Wolf M. Mooij, A. Basset
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 behavior of U- and Th-series nuclides in the estuarine environment The behavior of U- and Th-series nuclides in the estuarine environment
Rivers carry the products of continental weathering, and continuously supply the oceans with a broad range of chemical constituents. This erosional signature is, however, uniquely moderated by biogeochemical processing within estuaries. Estuaries are commonly described as complex filters at land-sea margins, where significant transformations can occur due to strong physico-chemical...
Authors
P.W. Swarzenski, D. Porcelli, P.S. Andersson, J.M. Smoak
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