Annual survival estimation of migratory songbirds confounded by incomplete breeding site-fidelity: Study designs that may help
M.R. Marshall, Duane R. Diefenbach, L.A. Wood, R.J. Cooper
2004, Animal Biodiversity and Conservation (27) 59-72
Many species of bird exhibit varying degrees of site-fidelity to the previous year's territory or breeding area, a phenomenon we refer to as incomplete breeding site-fidelity. If the territory they occupy is located beyond the bounds of the study area or search area (i.e., they have emigrated from the study...
Ichthyophoniasis: An emerging disease of Chinook salmon in the Yukon River
R. Kocan, P. Hershberger, J. Winton
2004, Journal of Aquatic Animal Health (16) 58-72
Before 1985, Ichthyophonus was unreported among Pacific salmon Oncorhynchus spp. from the Yukon River; now it infects more than 40% of returning adult Chinook salmon O. tshawytscha. Overall infection prevalence reached about 45% in the Yukon River and about 30% in the Tanana River between 1999 and 2003. Mean infection...
Decompression experiments identify kinetic controls on explosive silicic eruptions
M. T. Mangan, T. W. Sisson, W.B. Hankins
2004, Geophysical Research Letters (31)
Eruption intensity is largely controlled by decompression‐induced release of water‐rich gas dissolved in magma. It is not simply the amount of gas that dictates how forcefully magma is propelled upwards during an eruption, but also the rate of degassing, which is partly a function of the supersaturation pressure (ΔPcritical) triggering...
The freshwater transport and dynamics of the western Maine coastal current
W.R. Geyer, R. P. Signell, D.A. Fong, Jingyuan Wang, D.M. Anderson, B.A. Keafer
2004, Continental Shelf Research (24) 1339-1357
Observations in the Gulf of Maine, USA, were used to characterize the freshwater transport, temporal variability and dynamics of the western Maine coastal current. These observations included moored measurements, multiple hydrographic surveys, and drifter releases during April–July of 1993 and 1994. There is a strong seasonal signal in salinity and...
Littoral Assessment of Mine Burial Signatures (LAMBS) buried land mine/background spectral signature analyses
A.C. Kenton, D.M. Geci, K.J. Ray, C.M. Thomas, J.W. Salisbury, J.C. Mars, J.K. Crowley, N.H. Witherspoon, J.H. Holloway Jr.
J.H. Harmon R.S.Broach J.T.Holloway, editor(s)
2004, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The objective of the Office of Naval Research (ONR) Rapid Overt Reconnaissance (ROR) program and the Airborne Littoral Reconnaissance Technologies (ALRT) project's LAMBS effort is to determine if electro-optical spectral discriminants exist that are useful for the detection of land mines in littoral regions. Statistically significant buried mine overburden and...
Electrofishing injury and short-term mortality in hatchery-reared rainbow trout stocked into an Ozark stream
M. G. Walsh, D.L. Winkelman, R.J. Bahr
2004, North American Journal of Fisheries Management (24) 316-321
We conducted an electrofishing injury study to evaluate potential effects of sampling procedures on survival and health of hatchery rainbow trout Oncorhynchus mykiss (187-307 mm total length) stocked into an Ozark stream. We assessed two groups of trout: one group had acclimated to stream conditions for 1 month; the other...
An evaluation of the individual components and accuracies associated with the determination of impervious area
E.T. Slonecker, J.S. Tilley
2004, GIScience and Remote Sensing (41) 165-184
The percentage of impervious surface area in a watershed has been widely recognized as a key indicator of terrestrial and aquatic ecosystem condition. Although the use of the impervious indicator is widespread, there is currently no consistent or mutually accepted method of computing impervious area and the approach of various...
Nevadaite, (Cu2+, Al, V3+)6 [Al8 (PO4)8 F8] (OH 2 (H2O)22, a new phosphate mineral species from the Gold Quarry mine, Carlin, Eureka County, Nevada: Description and crystal structure
M. A. Cooper, Frank C. Hawthorne, Andrew C. Roberts, E.E. Foord, Richard C. Erd, H. T. Evans Jr., M.C. Jensen
2004, Canadian Mineralogist (42) 741-752
Nevadaite, (Cu2+, □, Al, V3+)6 (PO4)8 F8 (OH)2 (H2O)22, is a new supergene mineral species from the Gold Quarry mine, near Carlin, Eureka County, Nevada, U.S.A. Nevadaite forms radiating clusters to 1 mm of prismatic crystals, locally covering surfaces more that 2 cm across; individual crystals are elongate on [001] with a length:width ratio...
Relatedness and nesting dispersion within breeding populations of Greater White-fronted Geese
A. C. Fowler, J.M. Eadie, Craig R. Ely
2004, Condor (106) 600-607
We studied patterns of relatedness and nesting dispersion in female Pacific Greater White-fronted Geese (Anser albifrons frontalis) in Alaska. Female Greater White-fronted Geese are thought to be strongly philopatric and are often observed nesting in close association with other females. Analysis of the distribution of nests on the Yukon-Kuskokwim Delta...
Common raven juvenile survival in a human-augmented landscape
William C. Webb, William I. Boarman, John T. Rotenberry
2004, The Condor (106) 517-528
Anthropogenic resource subsidies have contributed to the dramatic increase in the abundance of Common Ravens (Corvus corax) in the western Mojave Desert, California, during the past 30 years. To better understand the effects of these subsidies on raven demography, we examined whether survival to juvenile departure from the natal territory...
Nests and nest habitats of the invasive catfish Hoplosternum littorale in Lake Tohopekaliga, Florida: A novel association with non-native Hydrilla Verticillata
L.G. Nico, A.M. Muench
2004, Southeastern Naturalist (3) 451-466
Abstract not supplied at this time...
Systematic variation in the depths of slabs beneath arc volcanoes
P. England, R. Engdahl, W. Thatcher
2004, Geophysical Journal International (156) 377-408
The depths to the tops of the zones of intermediate-depth seismicity beneath arc volcanoes are determined using the hypocentral locations of Engdahl et al. These depths are constant, to within a few kilometres, within individual arc segments, but differ by tens of kilometres from one arc segment to another. The...
Effects of fault dip and slip rake angles on near-source ground motions: Why rupture directivity was minimal in the 1999 Chi-Chi, Taiwan, earthquake
Brad T. Aagaard, J. F. Hall, T. H. Heaton
2004, Bulletin of the Seismological Society of America (94) 155-170
We study how the fault dip and slip rake angles affect near-source ground velocities and displacements as faulting transitions from strike-slip motion on a vertical fault to thrust motion on a shallow-dipping fault. Ground motions are computed for five fault geometries with different combinations of fault dip and rake angles...
Bald Eagles consume Emperor Geese during late-winter in the Aleutian Archipelago
Mark A. Ricca, Robert G. Anthony, Jeffrey C. Williams
2004, Journal of Raptor Research (38) 81-85
Emperor Geese (Chen canagica) are a species of concern because their population has declined rapidly since the mid-1960s and continues to remain below management objectives (Petersen et al. 1994). Emperor Geese are restricted primarily to Alaska and exhibit an east-west migration pattern, whereby most birds begin breeding on the Yukon-Kuskokwim...
High latitude meteoric δ18O compositions: Paleosol siderite in the Middle Cretaceous Nanushuk Formation, North Slope, Alaska
David F. Ufnar, Greg A. Ludvigson, Luis A. Gonzalez, Richard L. Brenner, Brian J. Witzke
2004, Geological Society of America Bulletin (116) 463-473
Siderite-bearing pedogenic horizons of the Nanushuk Formation of the North Slope, Alaska, provide a critical high paleolatitude oxygen isotopic proxy record of paleoprecipitation, supplying important empirical data needed for paleoclimatic reconstructions and models of "greenhouse-world" precipitation rates. Siderite ??18O values were determined from four paleosol horizons in the National Petroleum...
Acidification of forest soil in Russia: From 1893 to present
A.G. Lapenis, G.B. Lawrence, A.A. Andreev, A.A. Bobrov, M.S. Torn, J.W. Harden
2004, Global Biogeochemical Cycles (18)
It is commonly believed that fine-textured soils developed on carbonate parent material are well buffered from possible acidification. There are no data, however, that document resistance of such soils to acidic deposition exposure on a timescale longer than 30-40 years. In this paper, we report on directly testing the long-term...
Multi-scale and nested-intensity sampling techniques for archaeological survey
O. Burger, L.C. Todd, P. Burnett, T.J. Stohlgren, D. Stephens
2004, Journal of Field Archaeology (29) 409-423
This paper discusses sampling techniques for archaeological survey that are directed toward evaluating the properties of surface artifact distributions. The sampling techniques we experimented with consist of a multi-scale sampling plot developed in plant ecology and the use of a nested-intensity survey design. We present results from the initial application...
Sensitivity to acidification of subalpine ponds and lakes in north-western Colorado
K. Campbell, E. Muths, J.T. Turk, P.S. Corn
2004, Hydrological Processes (18) 2817-2834
Although acidifying deposition in western North America is lower than in many parts of the world, many high-elevation ecosystems there are extremely sensitive to acidification. Previous studies determined that the Mount Zirkel Wilderness Area (MZWA) has the most acidic snowpack and aquatic ecosystems that are among the most sensitive in...
Collared peccary range expansion in northwestern New Mexico
S. Albert, C.A. Ramotnik, C.G. Schmitt
2004, Southwestern Naturalist (49) 524-528
We report new records of collared peccary (Pecari tajacu) in New Mexico that document its continued northward expansion in the United States, in general, and in northwestern New Mexico, in particular. These records might represent the northernmost extent of its range in the Southwest. Collared peccaries in New Mexico typically...
Predicting the thermal effects of dam removal on the Klamath River
J.M. Bartholow, S.G. Campbell, M. Flug
2004, Environmental Management (34) 856-874
The Klamath River once supported large runs of anadromous salmonids. Water temperature associated with multiple mainstem hydropower facilities might be one of many factors responsible for depressing Klamath salmon stocks. We combined a water quantity model and a water quality model to predict how removing the series of dams below...
Sustaining healthy freshwater ecosystems
Jill Baron, N.L. Poff
2004, Water Resources Update (127) 52-58
Functionally intact and biologically complex freshwater ecosystems provide many economically valuable commodities and services to society. The services supplied by freshwater ecosystems include flood control, transportation, recreation, purification of human and industrial wastes, habitat for plants and animals, and production of fish and other foods and marketable goods. These human...
Purification of triolein for use in semipermeable membrane devices (SPMDs)
J.A. Lebo, F.V. Almeida, W.L. Cranor, J. D. Petty, J.N. Huckins, A. Rastall, D.A. Alvarez, B.B. Mogensen, B. Thomas Johnson
2004, Chemosphere (54) 1217-1224
Analyses of triolein-containing semipermeable membrane devices (SPMDs) have sometimes been impeded by interferences caused by impurities endemic to triolein that codialyze with the analytes. Oleic acid and methyl oleate have been the most troublesome of these impurities because of their relatively high concentrations in triolein and because significant residues of...
National Wildlife Health Center Quarterly Mortality Report
K. A. Converse, R. Sohn, C. Lemanski, G. McLaughlin
2004, Supplement to the Journal of Wildlife Diseases (40)
A review of models and micrometeorological methods used to estimate wetland evapotranspiration
J.Z. Drexler, R.L. Snyder, D. Spano, U.K.T. Paw
2004, Hydrological Processes (18) 2071-2101
Within the past decade or so, the accuracy of evapotranspiration (ET) estimates has improved due to new and increasingly sophisticated methods. Yet despite a plethora of choices concerning methods, estimation of wetland ET remains insufficiently characterized due to the complexity of surface characteristics and the diversity of wetland types. In...
Use of simulated evaporation to assess the potential for scale formation during reverse osmosis desalination
G. F. Huff
2004, Desalination (160) 285-292
The tendency of solutes in input water to precipitate efficiency lowering scale deposits on the membranes of reverse osmosis (RO) desalination systems is an important factor in determining the suitability of input water for desalination. Simulated input water evaporation can be used as a technique to quantitatively assess the potential...
