A first generation cytogenetic ideogram for the Florida manatee (Trichechus manatus latirostris) based on multiple chromosome banding techniques
B.A. Gray, Roberto T. Zori, P.M. McGuire, R. K. Bonde
2002, Hereditas (137) 215-223
Detailed chromosome studies were conducted for the Florida manatee (Trichechus manatus latirostris) utilizing primary chromosome banding techniques (G- and Q-banding). Digital microscopic imaging methods were employed and a standard G-banded karyotype was constructed for both sexes. Based on chromosome banding patterns and measurements obtained in these studies, a standard karyotype...
A budget of marine and terrigenous sediments, Hanalei Bay, Kauai, Hawaiian Islands
R.S. Calhoun, C. H. Fletcher, J.N. Harney
2002, Sedimentary Geology (150) 61-87
The sediment budget of Hanalei Bay on the north shore of Kauai was calculated using sedimentological and geophysical methods. The calculations of the budget subsequently allowed an interpretation of the Holocene history of the bay. The bay sediments are easily separated into marine (carbonate) and terrigenous (siliciclastic) grains. Surficial sediments...
Buoyancy differences among two deepwater ciscoes from the Great Lakes and their putative ancestor
A.E. Krause, R.L. Eshenroder, L.J. Begnoche
2002, Advances in Limnology (57) 233-242
We analyzed buoyancy in two deepwater ciscoes, Coregonus hoyi and C. kiyi, and in C. artedi, their putative ancestor, and also analyzed how variations in fish weight, water content, and lipid content affected buoyancy. Buoyancy was significantly different among the three species (p < 0.0001). Estimates of percent buoyancy (neutral...
Grassland birds orient nests relative to nearby vegetation
S. T. Hoekman, I.J. Ball, Thomas F. Fondell
2002, The Wilson Bulletin (114) 450-456
We studied orientation of nest sites relative to nearby vegetation for dabbling ducks (Cinnamon Teal, Anas cyanoptera; Blue-winged Teal, A. discors; Gadwall, A. strepera; Mallard, A. platyrhynchos; and Northern Shoveler, A. clypeata) and Short-eared Owls (Asio flammeus) in ungrazed grassland habitat during 1995–1997 in westcentral Montana. We estimated an...
Potential for restoration of the Roanoke River population of Atlantic sturgeon
J.L. Armstrong, J.E. Hightower
2002, Journal of Applied Ichthyology (18) 475-480
The Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus) was historically abundant within Albemarie Sound and the Roanoke River in North Carolina, but declined dramatically in the late 1800s in response to intensive fishing. Recent evidence suggests that the population may be recovering, following a statewide prohibition on harvest in 1991. A recruitment...
Persistence of an unusual pelagic zooplankton assemblage in a clear, mountain lake
G.L. Larson, R.L. Hoffman, McIntire C. David
2002, Hydrobiologia (468) 163-170
The planktonic zooplankton assemblage in Mowich Lake, Mount Rainier National Park (MORA), was composed almost entirely of rotifers in 1966 and 1967. Adult pelagic crustacean taxa were rare. Their paucity was attributed to predation by kokanee salmon (Oncorhynchus nerka), which had been stocked in 1961. During a park-wide survey of...
Seed chemistry of Sophora chrysophylla (mamane) in relation to diet of specialist avian seed predator Loxioides bailleui (palila) in Hawaii
P.C. Banko, M.L. Cipollini, G.W. Breton, E. Paulk, M. Wink, Ido Izhaki
2002, Journal of Chemical Ecology (28) 1393-1410
This study describes the chemical ecology of a tritrophic interaction among species endemic to the island of Hawaii, USA: a tree (Sophora chrysophylla: mamane), an endangered bird (Loxioides bailleui; palila), and moth larvae (Cydia spp.). Palila and Cydia both specialize on the seed embryos of mamane but avoid eating the...
Assessment of injury to fish and wildlife resources in the Grand Calumet River and Indiana Harbor Area of Concern, USA
D.D. MacDonald, C.G. Ingersoll, D.E. Smorong, R.A. Lindskoog, D. W. Sparks, J.R. Smith, T.P. Simon, M.A. Hanacek
2002, Archives of Environmental Contamination and Toxicology (43) 130-140
This article is the second in a series of three that describes the results of a Natural Resource Damage Assessment (NRDA) conducted in the Grand Calumet River and Indiana Harbor Area of Concern (IHAOC). The assessment area is located in northwest Indiana and was divided into nine reaches to facilitate...
Late quaternary evolution of the Orinoco Delta, Venezuela
A.G. Warne, E.H. Guevara, A. Aslan
2002, Journal of Coastal Research (18) 225-253
The modern Orinoco Delta is the latest of a series of stacked deltas that have infilled the Eastern Venezuelan Basin (EVB) since the Oligocene. During the late Pleistocene sea-level lowstand (20,000 to 16,000 yrs BP), bedrock control points at the position of the present delta apex prevented the river channel...
Traceable Radiometry Underpinning Terrestrial- and Helio- Studies (TRUTHS)
N. Fox, J. Aiken, J.J. Barnett, X. Briottet, R. Carvell, C. Frohlich, S.B. Groom, O. Hagolle, J.D. Haigh, H. H. Kieffer, J. Lean, D.B. Pollock, T. Quinn, M.C.W. Sandford, M. Schaepman, K.P. Shine, W.K. Schmutz, P.M. Teillet, K. J. Thome, M.M. Verstraete, E. Zalewski
Fujisada H.Lurie J.B.Aten M.L.Weber K., editor(s)
2002, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Traceable Radiometry Underpinning Terrestrial- and Helio- Studies (TRUTHS) mission offers a novel approach to the provision of key scientific data with unprecedented radiometric accuracy for Earth Observation (EO) and solar studies, which will also establish well-calibrated reference targets/standards to support other EO missions. This paper will present the TRUTHS...
Seismic determination of saturation in fractured reservoirs
R.L. Brown, M.L. Wiggins, A. Gupta
2002, SPE Journal (7) 237-242
Detecting the saturation of a fractured reservoir using shear waves is possible when the fractures have a geometry that induces a component of movement perpendicular to the fractures. When such geometry is present, vertically traveling shear waves can be used to examine the saturation of the fractured reservoir. Tilted, corrugated,...
Place vs. time and vegetational persistence: A comparison of four tropical mires from the Illinois Basin during the height of the Pennsylvanian Ice Age
William A. DiMichele, T.L. Phillips, W. John Nelson
2002, International Journal of Coal Geology (50) 43-72
Coal balls were collected from four coal beds in the southeastern part of the Illinois Basin. Collections were made from the Springfield, Herrin, and Baker coals in western Kentucky, and from the Danville Coal in southwestern Indiana. These four coal beds are among the principal mineable coals of the Illinois...
Holocene vegetation and climate history of the northern Bighorn Basin, southern Montana
M.E. Lyford, J.L. Betancourt, S.T. Jackson
2002, Quaternary Research (58) 171-181
Records of Holocene vegetation and climate change at low elevations (<2000 m) are rare in the central Rocky Mountain region. We developed a record of Holocene vegetation and climate change from 55 14C-dated woodrat middens at two low-elevation sites (1275 to 1590 m, currently vegetated by Juniperus osteosperma woodlands, in...
The unionid (Bivalvia) fauna of the Sipsey River in northwestern Alabama, an aquatic hotspot
W. Henry McCullagh, James D. Williams, Stuart W. McGregor, J. Malcom Pierson, Charles Lydeard
2002, American Malacological Bulletin (17) 1-15
Recent surveys for unionid bivalves were conducted in the mainstem of the Sipsey River and headwater tributaries (Tombigbee River drainage) during the summer and autumn of 1996-1999. A total of 35 species and 22 genera were found. Museum records from the upper Sipsey, based largely on the efforts of H....
δ13C values of soil organic matter in semiarid grassland with mesquite (Prosopis) encroachment in southeastern Arizona
Thomas H. Biggs, Jay Quade, Robert H. Webb
2002, Geoderma (110) 109-130
Over the past century, C3 woody plants and trees have increased in abundance in many semiarid ecosystems, displacing native C4 grasses. Livestock grazing, climatic fluctuations, and fire suppression are several reasons proposed for this shift. Soil carbon isotopic signatures are an ideal technique to evaluate carbon turnover rates in such...
Examples of landscape indicators for assessing environmental conditions and problems in urban and suburban areas
J. F. Martin-Duque, A. Godfrey, A. Diez, E. Cleaves, J. Pedraza, M.A. Sanz, R.M. Carrasco, J. Bodoque
C.A. Brebbia, J.F. Martin-Duque, L.C. Wadhwa, editor(s)
2002, Conference Paper, Advances in Architecture Series
Geo-indicators can help to assess environmental conditions in city urban and suburban areas. Those indicators should be meaningful for understanding environmental changes. From examples of Spanish and American cities, geo-indicators for assessing environmental conditions and changes in urban and suburban areas are proposed. The paper explore two types of geo-indicators....
Strontium isotopic signatures of the streams and lakes of Taylor Valley, Southern Victoria Land, Antarctica: Chemical weathering in a polar climate
W.B. Lyons, C.A. Nezat, L. V. Benson, T.D. Bullen, E.Y. Graham, J. Kidd, K.A. Welch
2002, Aquatic Geochemistry (8) 75-95
We have collected and analyzed a series of water samples from three closed-basin lakes (Lakes Bonney, Fryxell, and Hoare) in Taylor Valley, Antarctica, and the streams that flow into them. In all three lakes, the hypolimnetic waters have different 87Sr/86Sr ratios than the surface waters, with the deep water of...
Assessing mine drainage pH from the color and spectral reflectance of chemical precipitates
D.J. Williams, J.M. Bigham, C.A. Cravotta III, S.J. Traina, J.E. Anderson, J.G. Lyon
2002, Applied Geochemistry (17) 1273-1286
The pH of mine impacted waters was estimated from the spectral reflectance of resident sediments composed mostly of chemical precipitates. Mine drainage sediments were collected from sites in the Anthracite Region of eastern Pennsylvania, representing acid to near neutral pH. Sediments occurring in acidic waters contained primarily schwertmannite and goethite...
Rodent middens, a new method for Quaternary research in arid zones of South America
J.L. Betancourt, B. Saavedra
2002, Revista Chilena de Historia Natural (75) 527-546
In arid and semi-arid regions of South America, historical evidence for climate and vegetation change is scarce despite its importance for determining reference conditions and rates of natural variability in areas susceptible to modern desertification. Normal lines of evidence, such as pollen stratigraphies from lakes, are either rare or unobtainable...
Whirling disease among snake river cutthroat trout in two spring streams in Wyoming
W.A. Hubert, M. P. Joyce, R. Gipson, D. Zafft, D. Money, D. Hawk, B. Taro
2002, American Fisheries Society Symposium (2002) 181-193
We assessed endemic age-0 cutthroat trout Oncorhynchus clarki for evidence of pathology associated with Myxobolus cerebralis in two streams formed by springs in western Wyoming. We hypothesized that the location of spawning sites in spring streams would affect the extent of exposure of cutthroat trout fry to M. cerebralis triactinomyxons...
Assessing browse trend at the landscape level Part 2: Monitoring
R.B. Keigley, M.R. Frisina, C.W. Fager
2002, Rangelands (24) 34-38
In Part 1, we assessed browse trend across a wide geographic area of Mt. Haggin Wildlife Management Area by conducting surveys of browsing-related architectures. Those data were qualitative. Below we describe the periodic collection of quantitative data from permanently marked locations; we refer to this phase of the trend assessment...
Porometric properties of siliciclastic marine sand: A comparison of traditional laboratory measurements with image analysis and effective medium modeling
A.H. Reed, K.B. Briggs, D. L. Lavoie
2002, IEEE Journal of Oceanic Engineering (27) 581-592
During the 1999 sediment acoustics experiment (SAX99), porometric properties were measured and predicted for a well sorted, medium sand using standard laboratory geotechnical methods and image analysis of resin-impregnated sediments. Sediment porosity measured by laboratory water-weight-loss methods (0.372 ?? 0.0073 for mean ??1 standard deviation) is 0.026 lower than determined...
Residual bias in a multiphase flow model calibration and prediction
E. P. Poeter, R.H. Johnson
2002, Acta Universitatis Carolinae, Geologica (46) 208-212
When calibrated models produce biased residuals, we assume it is due to an inaccurate conceptual model and revise the model, choosing the most representative model as the one with the best-fit and least biased residuals. However, if the calibration data are biased, we may fail to identify an acceptable model...
Weighting observations in the context of calibrating ground-water models
M. C. Hill, C. R. Tiedeman
2002, Acta Universitatis Carolinae, Geologica (46) 213-217
This paper investigates four issues related to weighting observations in the context of ground-water models calibrated with nonlinear regression: (1) terminology, (2) determining values for the weighting, (3) measurement and model errors, and (4) the effect weighting can have on the accuracy of calibrated models and measures of uncertainty. It...
In Search of Easy-to-Use Methods for Calibrating ADCP's for Velocity and Discharge Measurements
K. Oberg
Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B.Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B., editor(s)
2002, Conference Paper, Hydraulic Measurements and Experimental Methods
A cost-effective procedure for calibrating acoustic Doppler current profilers (ADCP) in the field was presented. The advantages and disadvantages of various methods which are used for calibrating ADCP were discussed. The proposed method requires the use of differential global positioning system (DGPS) with sub-meter accuracy and standard software for collecting...
