Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16731
Characteristics, transport, and yield of sediment in Juday Creek, St. Joseph County, Indiana, 1993-94 Characteristics, transport, and yield of sediment in Juday Creek, St. Joseph County, Indiana, 1993-94
Juday Creek is a tributary of the St. Joseph River in St. Joseph County, north-central Indiana. The creek has been identified as one of the few streams in the State that can support a naturally reproducing brown trout population. A recent study of benthic invertebrates shows a decline in the production rate of insect species and suggests that this decline may be caused by increased...
Authors
K. K. Fowler, J.T. Wilson
Age and diagenesis of the upper Floridan Aquifer and the intermediate aquifer system in southwestern Florida Age and diagenesis of the upper Floridan Aquifer and the intermediate aquifer system in southwestern Florida
No abstract available.
Authors
Lucy McCartan, S.D. Weedman, G.L. Wingard, Lucy E. Edwards, P. J. Sugarman, M.D. Feigenson, M. L. Buursink, J.C. Libarkin
Deposition and simulation of sediment transport in the Lower Susquehanna River reservoir system Deposition and simulation of sediment transport in the Lower Susquehanna River reservoir system
The Susquehanna River drains 27,510 square miles in New York, Pennsylvania, and Maryland and is the largest tributary to the Chesapeake Bay. Three large hydroelectric dams are located on the river, Safe Harbor (Lake Clarke) and Holtwood (Lake Aldred) in southern Pennsylvania, and Conowingo (Conowingo Reservoir) in northern Maryland. About 259 million tons of sediment have been deposited...
Authors
R.A. Hainly, L.A. Reed, H.N. Flippo, G. J. Barton
U-Pb ages of metarhyolites of the Catoctin and Mount Rogers formations, central and southern Appalachians: Evidence for two pulses of Iapetan rifting U-Pb ages of metarhyolites of the Catoctin and Mount Rogers formations, central and southern Appalachians: Evidence for two pulses of Iapetan rifting
No abstract available.
Authors
John N. Aleinikoff, Robert E. Zartman, Marianne Walter, Douglas W. Rankin, Peter T. Lyttle, William C. Burton
Silver and other tracers of sewage particles in coastal and deep sea sediments off the east coast, USA Silver and other tracers of sewage particles in coastal and deep sea sediments off the east coast, USA
No abstract available.
Authors
Michael H. Bothner, Marilyn R. Buchholtz ten Brink, G.E. Ravizza
Rift flank segmentation, basin initiation and propagation: a neotectonic example from Lake Baikal Rift flank segmentation, basin initiation and propagation: a neotectonic example from Lake Baikal
New surficial data (field, Landsat TM and topography) define morpho-tectonic domains and rift flank segmentation in the Ol'khon region of the Central Baikal rift. Deformation, drainage and depositional patterns indicate a change in the locus of active extension that may relate to a recent (
Authors
Susan M. Agar, Kim D. Klitgord
Beach erosion and coastal development at Rincón, Puerto Rico Beach erosion and coastal development at Rincón, Puerto Rico
No abstract available.
Authors
E. Robert Thieler, Rafael W. Rodriguez, Milton Carlo
Point count length and detection of forest neotropical migrant birds Point count length and detection of forest neotropical migrant birds
No abstract available at this time
Authors
D.K. Dawson, D. R. Smith, C.S. Robbins
Aeromonas salmonicida in asymptomatic rainbow trout Aeromonas salmonicida in asymptomatic rainbow trout
No abstract available at this time
Authors
R. C. Cipriano
Influence of fluoride on aluminum toxicity to Atlantic salmon (Salmo salar) Influence of fluoride on aluminum toxicity to Atlantic salmon (Salmo salar)
Atlantic salmon (Salmo salar) alevins were exposed to various aluminum (0–4700 μg/L) and four fluoride (0–500 μg/L) concentrations at two pH values (5.5 and 6.5) for 4- and 30-d periods. In the 4-d tests, aluminum with fluoride was less toxic at pH 6.5 than at pH 5.5, whereas without fluoride, pH had no effect. In the 30-d test, mortality in all treatments was 17–21% at pH 5.5, but only...
Authors
Steven J. Hamilton, Terry A. Haines
Increased daylength stimulates plasma growth hormone and gill Na+, K+ and -ATPase Atlantic salmon (Salmo salar ) Increased daylength stimulates plasma growth hormone and gill Na+, K+ and -ATPase Atlantic salmon (Salmo salar )
Atlantic salmon juveniles reared at constant temperature (9–10°C) were exposed to four photoperiod treatment and sampled every 2 weeks from January through May. Fish reared under normal photoperiod exhibited eight-and three fold increases in plasma growth hormone and gill Na+, K+-ATPase activity, respectively, between January and April. Fish exposed to abrupt increases in daylength (LD...
Authors
S. D. McCormick, Bjorn Thrandur Bjornsson, M. Sheridan, C. Eilertson, J. B. Carey, M. O'Dea
Continental climate response to orbital forcing from biogenic silica records in Lake Baikal Continental climate response to orbital forcing from biogenic silica records in Lake Baikal
CHANGES in insolation caused by periodic changes in the Earth's orbital parameters provide the primary forcing for global ice ages1-6. But it is not clear to what extent the climates in continental interiors are controlled directly by regional variations in insolation and to what extent they are driven instead by the highly nonlinear response of the oceans and ice sheets. Here we...
Authors
Steven M. Colman, J.A. Peck, E.B. Karabanov, Susan J. Carter, J.P. Bradbury, J.W. King, D. F. Williams