Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10351
Seed storage conditions change the germination pattern of clonal growth plants in Mediterranean salt marshes Seed storage conditions change the germination pattern of clonal growth plants in Mediterranean salt marshes
The effect of salinity level and extended exposure to different salinity and flooding conditions on germination patterns of three salt‐marsh clonal growth plants (Juncus subulatus, Scirpus litoralis, and S. maritimus) was studied. Seed exposure to extended flooding and saline conditions significantly affected the outcome of the germination process in a different, though predictable, way...
Authors
J. L. Espinar, L. V. Garcia, L. Clemente
Simulation of streamflow and estimation of recharge to the Edwards aquifer in the Hondo Creek, Verde Creek, and San Geronimo Creek watersheds, south-central Texas, 1951-2003 Simulation of streamflow and estimation of recharge to the Edwards aquifer in the Hondo Creek, Verde Creek, and San Geronimo Creek watersheds, south-central Texas, 1951-2003
The U.S. Geological Survey, in cooperation with the San Antonio Water System, constructed three watershed models using the Hydrological Simulation Program—FORTRAN (HSPF) to simulate streamflow and estimate recharge to the Edwards aquifer in the Hondo Creek, Verde Creek, and San Geronimo Creek watersheds in south-central Texas. The three models were calibrated and tested with available...
Authors
Darwin J. Ockerman
Thiamine content and thiaminase activity of ten freshwater stocks and one marine stock of alewives Thiamine content and thiaminase activity of ten freshwater stocks and one marine stock of alewives
Alewives Alosa pseudoharengus contain thiaminase activity that has been implicated in the development of a thiamine deficiency and associated effects in salmonines of the Great Lakes basin. Little is known about the factors that regulate thiaminase activity in alewives. We sampled alewives of uniform size (60-120 mm) during the summer of 1998 from the Gulf of St. Lawrence, seven of New...
Authors
J.D. Fitzsimons, B. Williston, J.L. Zajicek, D. E. Tillitt, S.B. Brown, L. R. Brown, D. C. Honeyfield, D.M. Warner, L. G. Rudstam, W. Pearsall
Two-dimensional hydrodynamic simulation of surface-water flow and transport to Florida Bay through the Southern Inland and Coastal Systems (SICS) Two-dimensional hydrodynamic simulation of surface-water flow and transport to Florida Bay through the Southern Inland and Coastal Systems (SICS)
Successful restoration of the southern Florida ecosystem requires extensive knowledge of the physical characteristics and hydrologic processes controlling water flow and transport of constituents through extremely low-gradient freshwater marshes, shallow mangrove-fringed coastal creeks and tidal embayments, and near-shore marine waters. A sound, physically based numerical model can...
Authors
Eric D. Swain, Melinda A. Wolfert, Jerad D. Bales, Carl R. Goodwin
Guidelines for the use of fishes in research Guidelines for the use of fishes in research
No abstract available.
Authors
J.G. Nickum, H.L. Bart, P.R. Bowser, I.E. Greer, C. Hubbs, Jill A. Jenkins, J.R. MacMillan, J.W. Rachlin, J. D. Rose, P. W. Sorenson, J.R. Tomasso
Light attenuation profiling as an indicator of structural changes in coastal marshes Light attenuation profiling as an indicator of structural changes in coastal marshes
To best respond to natural and human-induced stresses, resource managers and researchers require remote sensing techniques that can map the biophysical characteristics of natural resources on regional and local scales. The implementation of advanced measurement techniques would provide significant improvements in the quantity, quality, and timeliness of biophysical data useful in...
Authors
Elijah Ramsey III, Gene Nelson, Frank Baarnes, R. Spell
Gulf coast states wood stork tracking project Gulf coast states wood stork tracking project
No abstract available
Authors
Tommy Michot, Clinton W. Jeske
Soils and sediment: Understanding wetland biogeochemistry Soils and sediment: Understanding wetland biogeochemistry
No abstract available.
Authors
Stephen Faulkner
Leaky coastal margins; examples of enhanced coastal groundwater and surface-water exchange from Tampa Bay and Crescent Beach submarine spring, Florida, USA Leaky coastal margins; examples of enhanced coastal groundwater and surface-water exchange from Tampa Bay and Crescent Beach submarine spring, Florida, USA
No abstract available
Authors
P.W. Swarzenski, J. L. Kindinger
Using MODIS Terra 250 m imagery to map concentrations of total suspended matter in coastal waters Using MODIS Terra 250 m imagery to map concentrations of total suspended matter in coastal waters
No abstract available.
Authors
R. L. Miller, Brent A. McKee
The depositional history of three freshwater lakes in north central Florida: Brooklyn Lake, Levy's Prairie, and Cowpen Lake The depositional history of three freshwater lakes in north central Florida: Brooklyn Lake, Levy's Prairie, and Cowpen Lake
Florida has approximately 7800 lakes that are heavily concentrated in the north-central part of the state—a mantled karst terrain. Although much research has been conducted in Florida’s lakes, there is not much information on the sedimentary infill. The focus of this research is to define the sedimentary infill of three closely spaced lakes (Brooklyn Lake, Levys Prairie, and Cowpen Lake)...
Authors
Nancy T. DeWitt
Evaluating the effect of salinity on a simulated American Crocodile (Crocodylus acutus) population with applications to conservation and Everglades restoration Evaluating the effect of salinity on a simulated American Crocodile (Crocodylus acutus) population with applications to conservation and Everglades restoration
Everglades restoration will alter the hydrology of South Florida, affecting both water depth and salinity levels in the southern fringes of the Everglades, the habitat of the endangered American crocodile (Crocodylus acutus). A key question is what the effects of these hydrologic changes will be on the crocodile population. Reliable predictions of the viability of endangered species...
Authors
Paul M. Richards, Wolf M. Mooij, Donald L. DeAngelis