Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10364
The relationship between species richness and community biomass: The importance of environmental variables The relationship between species richness and community biomass: The importance of environmental variables
Several studies have used plant community biomass to predict species richness with varying success. In this study we examined the relationship between species richness and biomass for 36 marsh communities from two different watersheds. In addition, we measured several environmental variables and estimated the potential richness (the total number of species known to be able to occur in a...
Authors
L. Gough, J.B. Grace, K.L. Taylor
Geographic distribution: Leiocephalus carinatus virescens (Exuma Islands Curlytail Lizard) Geographic distribution: Leiocephalus carinatus virescens (Exuma Islands Curlytail Lizard)
Abstract not supplied at this time
Authors
R. Franz, C.K. Dodd
Intraspecific variation in the response of Taxodium distichum seedlings to salinity Intraspecific variation in the response of Taxodium distichum seedlings to salinity
Seedlings of 15 open-pollinated families of baldcypress (Taxodium distichum) were tested for their tolerance to combined salinty and flooding stress. Ten of the families were from coastal locations in Louisiana or Alabama, USA, that were slightly brackish. The other families were from locations not affected by saltwater intrusion. Five salinity levels were investigated--0,2,4,6, and 8 g...
Authors
J. A. Allen, J. L. Chambers, D. McKinney
Life history notes: Alsophis vudii vudii (Brown runner). Diet and Growth Life history notes: Alsophis vudii vudii (Brown runner). Diet and Growth
Abstract not supplied at this time
Authors
R. Franz, C.K. Dodd
Nutrient values of piranha (Characidae: Serrasalminae) prey items Nutrient values of piranha (Characidae: Serrasalminae) prey items
No abstract available.
Authors
L.G. Nico, M. Morales
Recognition of mussel taxa: a conservation challenge Recognition of mussel taxa: a conservation challenge
Abstract not supplied at this time
Authors
J.D. Williams, M. Mulvey
Geographic distribution: Sphaerodactylus nigropunctatus nigropunctatus (Exuma Islands Black-spotted Ground Gecko) Geographic distribution: Sphaerodactylus nigropunctatus nigropunctatus (Exuma Islands Black-spotted Ground Gecko)
No abstract available.
Authors
R. Franz, C. Kenneth Dodd
Sources of trends in water-quality data for selected streams in Texas, 1975-89 water years Sources of trends in water-quality data for selected streams in Texas, 1975-89 water years
Sources of trends in water-quality data for selected streams in Texas for the 1975-89 water years were investigated in this study. The investigation of sources was confined to distinct geographic patterns in the trend indicators for one constituent or for a group of related constituents. The probable source of trend patterns in nutrients and measures of oxygen in the Trinity River Basin...
Authors
T. L. Schertz, F.C. Wells, D.J. Ohe
Use of saltwater and freshwater habitats by wintering redheads in southern Texas Use of saltwater and freshwater habitats by wintering redheads in southern Texas
Behavioral data were gathered for redheads (Aythya americana Eyton) using saltwater and freshwater habitats in southern Texas, the northern portion of their major wintering range, in 1989–90. Saltwater and freshwater habitats were used for different purposes by wintering redheads. Approximately 41% of all redheads in saltwater habitats were feeding, while only 0.1% of redheads in...
Authors
Marc C. Woodin
Geologic history and hydrogeologic setting of the Edwards-Trinity aquifer system, west-central Texas Geologic history and hydrogeologic setting of the Edwards-Trinity aquifer system, west-central Texas
The Edwards-Trinity aquifer system underlies about 42,000 square miles of west-central Texas. Nearly flat-lying, mostly Comanche (Lower Cretaceous) strata of the aquifer system thin northwestward atop massive pre-Cretaceous rocks that are comparatively impermeable and structurally complex. From predominately terrigenous clastic sediments in the east and fluvialdeltaic (terrestrial)...
Authors
R.A. Barker, P. W. Bush, E.T. Baker
Selected ground-water data, and results of aquifer tests for the Upper Floridan aquifer, Brunswick, Glynn County, Georgia, area Selected ground-water data, and results of aquifer tests for the Upper Floridan aquifer, Brunswick, Glynn County, Georgia, area
No abstract available.
Authors
L. Elliott Jones, Morris L. Maslia
Hydrologic data collection at Crowders Creek and Steele Creek, York County, South Carolina, 1991-92 Hydrologic data collection at Crowders Creek and Steele Creek, York County, South Carolina, 1991-92
Rapid industrial and urban growth is anticipated in the vicinity of Crowders Creek near Clover, S.C., and Steele Creek near Fort Mill, S.C. These subbasins are in the Catawba River Basin in York County, S.C. To obtain baseline information on these basins prior to urbanization, gaging stations 02145642 (Crowders Creek near Clover, S.C.) and 021467801 (Steele Creek near Fort Mill, S.C.)...
Authors
John W. Gissendanner