Wildlife tradeoffs based on landscape models of habitat
C. Loehle, M.S. Mitchell
2000, Conference Paper, NCASI Proceedings
It is becoming increasingly clear that the spatial structure of landscapes affects the habitat choices and abundance of wildlife. In contrast to wildlife management based on preservation of critical habitat features such as nest sites on a beach or mast trees, it has not been obvious how to incorporate spatial...
Entrainment of riparian gravel and cobbles in an alluvial reach of a regulated canyon river
John G. Elliott, Lauren A. Hammack
2000, Regulated Rivers: Research & Management (16) 37-50
Many canyon rivers have channels and riparian zones composed of alluvial materials and these reaches, dominated by fluvial processes, are sensitive to alterations in streamflow regime. Prior to reservoir construction in the mid-1960s, banks and bars in alluvial reaches of the Gunnison River in the Black Canyon National Monument, Colorado,...
Comprehensive isolation of natural organic matter from water for spectral characterizations and reactivity testing
Jerry A. Leenheer, Jean-Philippe Croue, Mark Benjamin, Gregory V. Korshin, Cordelia J. Hwang, Auguste Bruchet, George R. Aiken
2000, Conference Paper, Natural organic matter and disinfection by-products
A variety of approaches were tested to comprehensively isolate natural organic matter (NOM) from water. For waters with high NOM concentrations such as the Suwannee River, Georgia, approaches that used combinations of membrane concentrations, evaporative concentrations, and adsorption on nonionic XAD resins, ion exchange resins and iron...
Assessing the Kansas water-level monitoring program: An example of the application of classical statistics to a geological problem
J.C. Davis
2000, The Compass: Earth Science Journal of Sigma Gamma Epsilon (75) 116-121
Geologists may feel that geological data are not amenable to statistical analysis, or at best require specialized approaches such as nonparametric statistics and geostatistics. However, there are many circumstances, particularly in systematic studies conducted for environmental or regulatory purposes, where traditional parametric statistical procedures can be beneficial. An example is...
Utility of palmatolepids and icriodontids in recognizing Upper Devonian Series, Stage, and possible substage boundaries
W. Ziegler, Charles Sandberg
2000, CFS Courier Forschungsinstitut Senckenberg 335-347
Conodonts are accepted internationally to define Devonian Series and Stage boundaries. Hence, the evolution and taxonomy of pelagic palmatolepids, primarily Palmatolepis and its direct ancestor Mesotaxis, and shallow-water icriodontids, Icriodus, Pelekysgnathus, and "Icriodus", are the major tools for recognizing subdivisions of the Upper Devonian. Palmatolepids are the basis for the...
[Book Review] Sunrise to Paradise: The story of Mount Rainier National Park
D. L. Peterson
2000, Northwest Science (74) 83-83
No abstract available....
Seasonal movement of brown trout in a southern appalachian river
K.H. Burrell, J. Jeffery Isely, D.B. Bunnell Jr., D. H. Van Lear, C.A. Dolloff
2000, Transactions of the American Fisheries Society (129) 1373-1379
Radio telemetry was used to evaluate the seasonal movement, activity level, and home range size of adult brown trout Salmo trutta in the Chattooga River watershed, one of the southernmost coldwater stream systems in the United States. In all, 27 adult brown trout (262-452 mm total length) were successfully monitored...
Harvest and reporting rates of game-farm ring-necked pheasants
Duane R. Diefenbach, C.F. Riegner, T.S. Hardisky
2000, Wildlife Society Bulletin (28) 1050-1059
Many state natural resource agencies release ring-necked pheasants (Phasianus colchicus) for hunting, but the effectiveness of these programs has never been evaluated on a statewide basis. We conducted a reward-band study to estimate harvest, reporting, and survival rates of pheasants raised and released by the Pennsylvania Game Commission (PGC) for...
Legacy of the California Gold Rush: Environmental geochemistry of arsenic in the southern Mother Lode Gold District
K. S. Savage, D.K. Bird, R. P. Ashley
2000, International Geology Review (42) 385-415
Gold mining activity in the Sierra Nevada foothills, both recently and during the California Gold Rush, has exposed arsenic-rich pyritic rocks to weathering and erosion. This study describes arsenic concentration and speciation in three hydrogeologic settings in the southern Mother Lode Gold District: mineralized outcrops and mine waste rock (overburden);...
Biomes of western North America at 18,000, 6000 and 0 14C yr BP reconstructed from pollen and packrat midden data
R.S. Thompson, K. H. Anderson
2000, Journal of Biogeography (27) 555-584
A new compilation of pollen and packrat midden data from western North America provides a refined reconstruction of the composition and distribution of biomes in western North America for today and for 6000 and 18,000 radiocarbon years before present (14C yr BP). Modern biomes in western North America are adequately...
Delayed, disequilibrium degassing in rhyolite magma: Decompression experiments and implications for explosive volcanism
M. Mangan, T. Sisson
2000, Earth and Planetary Science Letters (183) 441-455
Recent numerical models and analog shock tube experiments show that disequilibrium degassing during magma ascent may lead to violent vesiculation very near the surface. In this study a series of decompression experiments using crystal-free, rhyolite melt were conducted to examine the development of large supersaturations due to delayed, homogenous (spontaneous)...
Gulf sturgeon spawning migration and habitat in the Choctawhatchee River system, Alabama-Florida
Dewayne A. Fox, Joseph E. Hightower, Frank M. Parauka
2000, Transactions of the American Fisheries Society (129) 811-826
Information about spawning migration and spawning habitat is essential to maintain and ultimately restore populations of endangered and threatened species of anadromous fish. We used ultrasonic and radiotelemetry to monitor the movements of 35 adult Gulf sturgeon Acipenser oxyrinchus desotoi (a subspecies of the Atlantic sturgeon A. oxyrinchus) as they moved between Choctawhatchee...
Drifting invertebrates, stomach contents, and body conditions of juvenile rainbow trout from fall through winter in a Wyoming tailwater
D.G. Simpkins, W.A. Hubert
2000, Transactions of the American Fisheries Society (129) 1187-1195
We investigated the availability of drifting invertebrates and the stomach contents and body conditions of stocked (hatchery) and naturally spawned (wild) juvenile (20-25 cm total length) rainbow trout from fall through winter in the Big Horn River downstream from Boysen Dam in Wyoming. When the density and biomass of drifting...
Updated population metadata for United States historical climatology network stations
T.W. Owen, K. P. Gallo
2000, Journal of Climate (13) 4028-4033
The United States Historical Climatology Network (HCN) serial temperature dataset is comprised of 1221 high-quality, long-term climate observing stations. The HCN dataset is available in several versions, one of which includes population-based temperature modifications to adjust urban temperatures for the "heat-island" effect. Unfortunately, the decennial population metadata file is not...
January 30, 1997 eruptive event on Kilauea Volcano, Hawaii, as monitored by continuous GPS
S. Owen, P. Segall, M. Lisowski, Asta Mikijus, M. Murray, M. Bevis, J. Foster
2000, Geophysical Research Letters (27) 2757-2760
A continuous Global Positioning System (GPS) network on Kilauea Volcano captured the most recent fissure eruption in Kilauea's East Rift Zone (ERZ) in unprecedented spatial and temporal detail. The short eruption drained the lava pond at Pu'u O' o, leading to a two month long pause in its on-going eruption....
The effect of mineral bond strength and adsorbed water on fault gouge frictional strength
C.A. Morrow, Diane E. Moore, D.A. Lockner
2000, Geophysical Research Letters (27) 815-818
Recent studies suggest that the tendency of many fault gouge minerals to take on adsorbed or interlayer water may strongly influence their frictional strength. To test this hypothesis, triaxial sliding experiments were conducted on 15 different single-mineral gouges with various water-adsorbing affinities. Vacuum dried samples were sheared at 100 MPa,...
Mapping the petroleum system - An investigative technique to explore the hydrocarbon fluid system
L. B. Magoon, W.G. Dow
2000, AAPG Memoir (73) 53-68
Creating a petroleum system map includes a series of logical steps that require specific information to explain the origin in time and space of discovered hydrocarbon occurrences. If used creatively, this map provides a basis on which to develop complementary plays and prospects. The logical steps include the characterization of...
Possible origin and significance of extension-parallel drainages in Arizona's metamophic core complexes
J.E. Spencer
2000, Geological Society of America Bulletin (112) 727-735
The corrugated form of the Harcuvar, South Mountains, and Catalina metamorphic core complexes in Arizona reflects the shape of the middle Tertiary extensional detachment fault that projects over each complex. Corrugation axes are approximately parallel to the fault-displacement direction and to the footwall mylonitic lineation. The core complexes are locally...
Image and in situ data integration to derive sawgrass density for surface flow modelling in the Everglades, Florida, USA
J. W. Jones
2000, IAHS-AISH Publication 507-512
The US Geological Survey is building models of the Florida Everglades to be used in managing south Florida surface water flows for habitat restoration and maintenance. Because of the low gradients in the Everglades, vegetation structural characteristics are very important and greatly influence surface water flow and distribution. Vegetation density...
Re-Os isotopic systematics of primitive lavas from the Lassen region of the Cascade arc, California
L. E. Borg, A.D. Brandon, M.A. Clynne, R.J. Walker
2000, Earth and Planetary Science Letters (177) 301-317
Rhenium-osmium isotopic systematics of primitive calc-alkaline lavas from the Lassen region appear to be controlled by mantle wedge processes. Lavas with a large proportion of slab component have relatively low Re and Os abundances, and have radiogenic Os and mid ocean ridge basalt-like Sr and Pb isotopic compositions. Lavas with...
Seasonal estimates of riparian evapotranspiration using remote and in situ measurements
D.C. Goodrich, R. Scott, J. Qi, B. Goff, C.L. Unkrich, M. S. Moran, D. Williams, S. Schaeffer, K. Snyder, R. MacNish, T. Maddock, D. Pool, A. Chehbouni, D.I. Cooper, W.E. Eichinger, W.J. Shuttleworth, Y. Kerr, R. Marsett, W. Ni
2000, Conference Paper, Agricultural and Forest Meteorology
In many semi-arid basins during extended periods when surface snowmelt or storm runoff is absent, groundwater constitutes the primary water source for human habitation, agriculture and riparian ecosystems. Utilizing regional groundwater models in the management of these water resources requires accurate estimates of basin boundary conditions. A critical groundwater boundary...
Kansas coal distribution, resources, and potential for coalbed methane
L. L. Brady
2000, The Compass: Earth Science Journal of Sigma Gamma Epsilon (75) 122-133
100 ft (>30 m)] determined from 32 different coal beds. Strippable coal resources at a depth <...
Coastal erosion vs riverline sediment discharge in the Arctic shelfx seas
V. Rachold, M.N. Grigoriev, F.E. Are, Sean C. Solomon, E. Reimnitz, H. Kassens, M. Antonow
2000, International Journal of Earth Sciences (89) 450-459
This article presents a comparison of sediment input by rivers and by coastal erosion into both the Laptev Sea and the Canadian Beaufort Sea (CBS). New data on coastal erosion in the Laptev Sea, which are based on field measurements and remote sensing information and existing data on coastal erosion...
Heterozygosity and fitness: No strong association in Great Lakes populations of the zebra mussel, Dreissena Polymorpha (Pallas)
K.M. Lewis, J.L. Feder, T.G. Horvath, G. A. Lamberti
2000, Malacologia (42) 113-122
A number of studies have found positive associations between allozyme heterozygosity and fitness surrogates (e.g., body size and growth rate) for marine molluscs. We investigated whether similar relationships exist for freshwater populations of the zebra mussel, Dreissena polymorpha. Only one significant correlation between multi-locus heterozygosity and shell length was observed...
Block coals from Indiana: Inferences on changing depositional environment
Maria Mastalerz, P.L. Padgett, C.F. Eble
2000, Conference Paper, International Journal of Coal Geology
Significant differences in coal petrography, palynology and coal quality were found between the Lower Block and Upper Block Coal Members (Brazil Formation, Pennsylvanian) in Daviess County, Indiana. The Lower Block Coal Member ranges in thickness from 51 to 74 cm and the Upper Block Coal Member ranges from 20 to...
