Soil and soil solution chemistry under red spruce stands across the northeastern united states
M.B. David, G.B. Lawrence
1996, Soil Science (161) 314-328
Red spruce ecosystems in the northeastern United States are of interest because this species is undergoing regional decline. Their underlying soils have been examined closely at only a few sites, and information available on red spruce soils throughout this region is limited.This study was conducted to examine soil and soil...
Factors affecting suspended-solids concentrations in South San Francisco Bay, California
D. H. Schoellhamer
1996, Journal of Geophysical Research C: Oceans (101) 12087-12095
Measurements of suspended-solids concentration (SSC) were made at two depths at three sites in South San Francisco Bay (South Bay) to determine the factors that affect SSC. Twenty-eight segments of reliable and continuous SSC time series data longer than 14 days were collected from late 1991 or 1992 through September...
Comparison of the in situ and desorption sediment-water partitioning of polycyclic aromatic hydrocarbons and polychlorinated biphenyls
S.E. Mcgroddy, J.W. Farrington, P.M. Gschwend
1996, Environmental Science & Technology (30) 172-177
In situ sediment−porewater partitioning of polycyclic aromatic hydrocarbons (PAHs) measured in three cores from Boston Harbor, MA, has led us to suggest that only a fraction of the total measured sediment PAH concentration is available for equilibrium partitioning (AEP fraction). To test this, aqueous PAH concentrations were measured in laboratory desorption experiments using subsamples...
Indirect effects: Concepts and approaches from ecological theory
D.L. DeAngeis
D.J. Baird, L. Maltby, P.W. Greig-Smith, P. E. T. Douben, editor(s)
1996, Book chapter, Ecotoxicology: Ecological demensions.
Abstract not supplied at this time...
A high-performance liquid chromatography-based screening method for the analysis of atrazine, alachlor, and ten of their transformation products
B. R. Schroyer, P. D. Capel
1996, ACS Symposium Series (630) 34-42
A high-performance liquid chromatography (HPLC) method is presented for the for the fast, quantitative analysis of the target analytes in water and in low organic-carbon, sandy soils that are known to be contaminated with the parent herbicides. Speed and ease of sample preparation was prioritized above minimizing detection limits. Soil...
Interaction of productivity and consumption
D.L. DeAngelis, L. Persson, A.D. Rosemond
G.A. Polis, K.O. Winemiller, editor(s)
1996, Book chapter, Food Webs: Integration of patterns and dynamics.
Abstract not supplied at this time...
Identification of organic compounds in the water of a fish culture system
J. Bonzo, D. C. Honeyfield
1996, Conference Paper, New York Academy of Sciences, Science Research Training Program, Journal of Abstracts
No abstract available at this time...
Serum factors as indicators of environmental stress: optimization of methodologies for striped bass
V. S. Blazer, D.L. Higginbotham, J.W. Fournie
J.S. Stolen, T.C. Fletcher, D. P. Anderson, J.T. Zelikoff, L.E. Twerdok, S.L. Kaattari, C.C. Bayne, editor(s)
1996, Book chapter, Modulators of Fish Immune Responses: Volume 1, Models for Environmental Toxicology, Biomarkers, Immunostimulators
No abstract available at this time...
Deep-sea ostracode shell chemistry (Mg:Ca ratios) and late Quaternary Arctic Ocean history
T. M. Cronin, Gary S. Dwyer, P.A. Baker, J. Rodriguez-Lazaro, W. M. Briggs Jr.
Andrews J.T.et al, editor(s)
1996, Geological Society Special Publication (111) 117-134
The magnesium:calcium (Mg:Ca) and strontium:calcium (Sr:Ca) ratios were investigated in shells of the benthic ostracode genus Krithe obtained from 64 core-tops from water depths of 73 to 4411 m in the Arctic Ocean and Nordic seas to determine the potential of ostracode shell chemistry for palaeoceanographic study. Shells from the...
Mobility of 2,2',5,5'-tetrachlorobiphenyl in model systems containing bottom sediments and water from the lower Fox River, Wisconsin
J. F. Elder, R.V. James, J. J. Steuer
1996, Journal of Great Lakes Research (22) 697-706
Sediment-water partitioning and diffusive transport of 2,2’,5,5’-tetrachlorobiphenyl, PCB congener IUPAC #52 (TCB52) were examined in laboratory experiments with sediments from two sites in the lower Fox River, Wisconsin. Native water was pumped at controlled flow rates through cells containing sediments amended...
Imaging the San Andreas fault with explosion and earthquake sources
C. Thurber, S. Roecker, W. Lutter, W. Ellsworth
1996, Eos, Transactions, American Geophysical Union (77) 45-48
Mounting evidence suggests that fault zone heterogeneity may play a crucial role in the localization of rupture in earthquakes [Aki, 1995]. The heterogeneity can take several forms: spatial variations in physical properties (elastic properties, pore fluid pressure, etc.) or complexity in the fault surface (bends, offsets, etc.). High-resolution, three-dimensional models...
Late Quaternary variations in relative sea level due to glacial cycle polar wander
B.G. Bills, T.S. James
1996, Geophysical Research Letters (23) 3023-3026
Growth and decay of continental ice sheets can excite significant motion of the Earth's rotation pole and cause a complex spatio-temporal pattern of changes in relative sea level. These two effects have generally been considered separately, but may interact in important ways. In particular, a simple...
Artificial wetlands to augment use by estuarine birds
Joy B. Zedler, Barbara E. Kus
1996, California Sea Grant Publication T-038-5.3
The value of natural wetlands to bird populations is well-recognized, and declines in waterfowl numbers are often attributed to losses in wetland area. if the destruction of wetland reduces bird populations, then adding wetland habitats might improve the situation. This idea was tested in Tijuana Estuary in the late 1980s.<br...
Lista de anfibios y reptiles del Museo Nacional de Historia Natural del Paraguay (marzo, 1980-setiembre 1995)
A.L. Aquino, N.J. Scott, M. Motte
1996, Ministerio de Agricultura y Ganaderia, MNHNP, Colecciones de fauna y flora del Museo Nacional de Historia Natural del Paraguay 331-400
No abstract available at this time...
Trihalomethane and nonpurgeable total organic-halide formation potentials of the Mississippi river
R. E. Rathbun
1996, Archives of Environmental Contamination and Toxicology (30) 156-162
Trihalomethane and nonpurgeable total organic-hallide formation potentials were determined for water samples from 12 sites along the Mississippi River from Minneapolis, MN, to New Orleans, LA, for the summer and fall of 1991 and the spring of 1992. The formation potentials increased with distance upstream, approximately paralleling the increase of...
Isotopic evidence for shifts in atmospheric circulation patterns during the late Quaternary in mid-North America
Ronald Amundson, O. Chadwick, C. Kendall, Y. Wang, M. DeNiro
1996, Geology (24) 23-26
Wyoming is now at the eastern margin of westerlies originating in the Pacific, but in the Pleistocene appears to have received moisture from elsewhere, possibly the Gulf of Mexico. Oxygen isotope ratios of pedogenic carbonate in postglacial terraces correspond to ratios in equilibrium...
Petrology and U-PB geochronology of the Robertson River Igneous Suite, Blue Ridge province, Virginia - Evidence for multistage magmatism associated witn an early episode of Laurentian rifting
Richard P. Tollo, John N. Aleinikoff
1996, American Journal of Science (296) 1045-1090
The Late Neoproterozoic (735-702 Ma) Robertson River Igneous Suite includes at least eight plutons ranging in composition from syenogranite to alkali feldspar granite to alkali feldspar syenite. These plutons intruded Mesoproterozoic (1.2-1.0 Ga) gneissic basement of the Blue Ridge anticlinorium in northern and central Virginia during an early episode of...
The southern limit of Cordilleran ice in the Colville and Pend Oreille valleys of northeastern Washington during the Late Wisconsin glaciation
P. E. Carrara, E.P. Kiver, D.F. Stradling
1996, Canadian Journal of Earth Sciences (33) 769-778
The southern limit of the lobes of the Cordilleran ice sheet in the Colville and Pend Oreille valleys of northeastern Washington during the Late Wisconsin (Fraser) glaciation has been placed at widely different positions by various investigators. The confusion that resulted in these different positions is due to the fact...
Hydrologic impact of Great Flood of 1993 in south-central Kansas
M. Sophocleous, A.J. Stern, S.P. Perkins
1996, Journal of Irrigation and Drainage Engineering (122) 203-210
The writers analyze the hydrologic budget and quantify the ground-water recharge impact of the Great Flood of 1993 on the Great Bend Prairie aquifer of south-central Kansas. During the summer of 1993, rainfall totals exceeded normal levels by 200% in the northern portion of the study area, while air temperature...
Geochemistry of the alginite and amorphous organic matter from type II-S kerogens
B.A. Stankiewicz, M.A. Kruge, Maria Mastalerz, G.L. Salmon
1996, Organic Geochemistry (24) 495-509
Maceral fractions of the Type II-S kerogens from the Monterey Formation (Miocene. California. U.S.A.) and Duwi Formation (Campanian/Maastrichtian, Egypt) were separated by density gradient centrifugation. The Monterey Fm. kerogen sample was comprised chiefly of light red-fluorescing amorphous organic matter (AOM), the flash pyrolyzate of which was characterized by a predominance...
Seedling emergence on Sonoran desert dunes
Janice E. Bowers
1996, Journal of Arid Environments (33) 63-72
Seedling emergence of psammophiles (plants restricted to active dunes) was examined with germination experiments and with field observations at the Algodones Dunes, California, U.S.A., and the Sierra del Rosario Dunes, Sonora, Mexico. In the field, perennial psammophiles germinated in response to smaller rainfall triggers (??? 10mm) than other woody desert...
Analysis of fractures intersecting Kahi Puka Well 1 and its relation to the growth of the island of Hawaii
Roger H. Morin, Frederick L. Paillet
1996, Journal of Geophysical Research B: Solid Earth (101) 11695-11699
As part of the Hawaii Scientific Drilling Project, Kahi Puka Well 1 penetrated about 275 m of Mauna Loa basalts overlying a sequence of Mauna Kea flow units as it was drilled and cored to a total depth of 1053 m below land surface. A borehole televiewer (BHTV) was run...
Galileo photometry of asteroid 243 Ida
P. Helfenstein, J. Veverka, P.C. Thomas, D.P. Simonelli, K. Klaasen, T. V. Johnson, F. Fanale, J. Granahan, A. S. McEwen, M. Belton, C. Chapman
1996, Icarus (120) 48-65
Galileo imaging observations over phase angles 19.5?? to 109.8?? are combined with near-opposition Earth-based data to derive the photometric properties of Ida. To first order these properties are uniform over the surface and well modeled at ?? = 0.55 ??m by Hapke parameters ????0 = 0.22, h = 0.020, B0...
Kulshan caldera: A quaternary subglacial caldera in the North Cascades, Washington
W. Hildreth
1996, Geological Society of America Bulletin (108) 786-793
Calderas that collapse during large pyroclastic eruptions are anomalously rare in the Cascade arc. Recognition of the early Pleistocene 4.5 × 8 km Kulshan caldera, filled with rhyodacite ignimbrite at the northeast foot of Mount Baker, brings to only three the Quaternary calderas identified in the Cascades. A near-vertical ring...
The influence of landscape position on lake chemical responses to drought in northern Wisconsin
K.E. Webster, T.K. Kratz, C.J. Bowser, J.J. Magnuson, W. J. Rose
1996, Limnology and Oceanography (41) 977-984
Climatic shifts to drier conditions during drought alter the hydrologic pathways of water and solute flow to aquatic ecosystems. We examined differences in drought-induced trends in the semiconservative cations, Ca+Mg, in seven northern Wisconsin lakes. These spanned the range of hydrologic settings in the region, including hydraulically mounded, groundwater flowthrough,...
