Survey trends of North American shorebirds: Population declines or shifting distributions?
Jonathan Bart, Stephen Brown, Brian A. Harrington, R.I. Guy Morrison
2007, Journal of Avian Biology (38) 73-82
We analyzed data from two surveys of fall migrating shorebirds in central and eastern North America to estimate annual trends in means per survey and to determine whether trends indicate a change in population size or might have been caused by other factors. The analysis showed a broad decline in...
Biodegradation of organic chemicals in soil/water microcosms system: Model development
L. Liu, J.A. Tindall, M.J. Friedel, W. Zhang
2007, Water, Air, & Soil Pollution (178) 131-143
The chemical interactions of hydrophobic organic contaminants with soils and sediments may result in strong binding and slow subsequent release rates that significantly affect remediation rates and endpoints. In order to illustrate the recalcitrance of chemical to degradation on sites, a sorption mechanism of intraparticle sequestration was postulated to operate...
Population growth of Yellowstone grizzly bears: Uncertainty and future monitoring
R.B. Harris, Gary C. White, C.C. Schwartz, M.A. Haroldson
2007, Ursus (18) 168-178
Grizzly bears (Ursus arctos) in the Greater Yellowstone Ecosystem of the US Rocky Mountains have recently increased in numbers, but remain vulnerable due to isolation from other populations and predicted reductions in favored food resources. Harris et al. (2006) projected how this population might fare in the future under alternative...
Development of a murre (Uria spp.) egg control material
Stacy S. Vander Pol, M.B. Ellisor, Rebecca S. Pugh, P.R. Becker, D.L. Poster, M.M. Schantz, S.D. Leigh, B.J. Wakeford, David G. Roseneau, Kristin S. Simac
2007, Conference Paper, Analytical and Bioanalytical Chemistry
The Seabird Tissue Archival and Monitoring Project (STAMP) is a collaborative Alaska-wide effort by the US Fish and Wildlife Service's Alaska Maritime National Wildlife Refuge (USFWS/AMNWR), the US Geological Survey's Biological Resources Division (USGS/BRD), the Bureau of Indian Affairs Alaska Region Subsistence Branch (BIA/ARSB), and the National Institute of Standards...
The oxygen-18 isotope approach for measuring aquatic metabolism in high-productivity waters
Craig R. Tobias, John Karl Bohlke, Judson W. Harvey
2007, Limnology and Oceanography (52) 1439-1453
We examined the utility of δ18O2 measurements in estimating gross primary production (P), community respiration (R), and net metabolism (P : R) through diel cycles in a productive agricultural stream located in the midwestern U.S.A. Large diel swings in O2(±200 µmol L−1) were accompanied by large diel variation in δ18O2 (±10‰). Simultaneous...
Procedures for the salvage and necropsy of the dugong (Dugong dugon)
Carole Eros, Helene Marsh, Robert K. Bonde, Thomas A. O’Shea, Cathy A. Beck, Cheri Recchia, Kirstin Dobbs, Malcolm Turner, Stephanie Lemm, Rachel Pears, Rachel Bowater
2007, Book
Data and specimens collected from dugong carcasses and live stranded individuals provide vital information for research and management agencies. The ability to assign a cause of death (natural and/or human induced) to a carcass assists managers to identify major threats to a population in certain areas and to evaluate and...
Effects of imposed salinity gradients on dissimilatory arsenate reduction, sulfate reduction, and other microbial processes in sediments from two California soda lakes
T.R. Kulp, S. Han, C.W. Saltikov, B.D. Lanoil, K. Zargar, Ron Oremland
2007, Applied and Environmental Microbiology (73) 5130-5137
Salinity effects on microbial community structure and on potential rates of arsenate reduction, arsenite oxidation, sulfate reduction, denitrification, and methanogenesis were examined in sediment slurries from two California soda lakes. We conducted experiments with Mono Lake and Searles Lake sediments over a wide range of salt concentrations...
Fort Collins Science Center: 2006 Accomplishments
Juliette T. Wilson, editor(s)
2007, Open-File Report 2007-1154
In Fiscal Year 2006 (FY06), the U.S. Geological Survey (USGS) Fort Collins Science Center (FORT) continued research vital to U.S. Department of the Interior (DOI) science and management needs and associated USGS programmatic goals. FORT work also supported the science needs of other governmental departments and agencies as well as...
Herpetofaunal Inventories of the National Parks of South Florida and the Caribbean: Volume IV. Biscayne National Park
Kenneth G. Rice, J. Hardin Waddle, Marquette E. Crockett, Christopher D. Bugbee, Brian M. Jeffery, H. Franklin Percival
2007, Open-File Report 2007-1057
Amphibian declines and extinctions have been documented around the world, often in protected natural areas. Concern for this alarming trend has prompted the U.S. Geological Survey and the National Park Service to document all species of amphibians that occur within U.S. National Parks and to search for any signs that...
Road impacts on the Baca National Wildlife Refuge, Colorado, with emphasis on effects to surface- and shallow ground-water hydrology - A literature review
Douglas C. Andersen
2007, Open-File Report 2007-1052
A review of published research on unpaved road effects on surface-water and shallow ground-water hydrology was undertaken to assist the Baca National Wildlife Refuge, Colorado, in understanding factors potentially influencing refuge ecology. Few studies were found that addressed hydrological effects of roads on a comparable area of shallow slope in...
Impact of recent extreme Arizona storms
C. S. Magirl, R. H. Webb, Peter G. Griffiths, M. Schaffner, C. Shoemaker, E. Pytlak, S. Yatheendradas, S. W. Lyon, Peter A. Troch, S. L. E. Desilets, D.C. Goodrich, C.L. Unkrich, Ann Youberg, P. A. Pearthree
2007, Eos, Transactions, American Geophysical Union (88) 191-193
Heavy rainfall on 27–31 July 2006 led to record flooding and triggered an historically unprecedented number of debris flows in the Santa Catalina Mountains north of Tucson, Ariz. The U.S. Geological Survey (USGS) documented record floods along four watercourses in the Tucson basin, and at least 250 hillslope failures spawned...
Selection for rapid embryo development correlates with embryo exposure to maternal androgens among passerine birds
H. Schwabl, M.G. Palacios, T. E. Martin
2007, American Naturalist (170) 196-206
Greater offspring predation favors evolution of faster development among species. We hypothesized that greater offspring predation exerts selection on mothers to increase levels of anabolic androgens in egg yolks to achieve faster development. Here, we tested whether (1) concentrations of yolk androgens in passerine species were associated with offspring predation...
Physical limits on ground motion at Yucca Mountain
D.J. Andrews, Thomas C. Hanks, J.W. Whitney
2007, Bulletin of the Seismological Society of America (97) 1771-1792
Physical limits on possible maximum ground motion at Yucca Mountain, Nevada, the designated site of a high-level radioactive waste repository, are set by the shear stress available in the seismogenic depth of the crust and by limits on stress change that can propagate through the medium. We find in dynamic...
Chemistry of water collected from an unventilated drift, Yucca Mountain, Nevada
B.D. Marshall, T.A. Oliver, Z. E. Peterman
2007, Conference Paper, Materials Research Society Symposium Proceedings
Water samples (referred to as puddle water samples) were collected from the surfaces of a conveyor belt and plastic sheeting in the unventilated portion of the Enhanced Characterization of the Repository Block (ECRB) Cross Drift in 2003 and 2005 at Yucca Mountain, Nevada. The chemistry of these puddle water samples...
Lithology-derived structure classification from the joint interpretation of magnetotelluric and seismic models
P. A. Bedrosian, N. Maercklin, U. Weckmann, Y. Bartov, T. Ryberg, O. Ritter
2007, Geophysical Journal International (170) 737-748
Magnetotelluric and seismic methods provide complementary information about the resistivity and velocity structure of the subsurface on similar scales and resolutions. No global relation, however, exists between these parameters, and correlations are often valid for only a limited target area. Independently derived inverse models from these methods can be combined...
Nesting habitat relationships of sympatric Crested Caracaras, Red-tailed Hawks, and White-tailed Hawks in South Texas
M.A. Actkinson, W.P. Kuvlesky Jr., C. W. Boal, L.A. Brennan, F. Hernandez
2007, Wilson Journal of Ornithology (119) 570-578
We quantified nesting-site habitats for sympatric White-tailed Hawks (Buteo albicaudatus) (n = 40), Red-tailed Hawks (B. jamaicensis) (n = 39), and Crested Caracaras (Caracara cheriway) (n = 24) in the Coastal Sand Plain of south Texas. White-tailed Hawks and Crested Caracara nest sites occurred in savannas, whereas Red-tailed Hawk nest...
Effects of highway construction on sediment and benthic macroinvertebrates in two tributaries of the Lost River, West Virginia
Lara B. Hedrick, S.A. Welsh, James T. Anderson
2007, Journal of Freshwater Ecology (22) 561-569
During a three-year study of two tributaries being crossed by a four-lane highway under construction in the eastern panhandle of West Virginia, we found little difference in the amount of fine sediment collected at upstream and downstream sites. The downstream site on one tributary collected significantly greater amounts of sediment...
Distribution and sedimentary characteristics of tsunami deposits along the Cascadia margin of western North America
R. Peters, B. Jaffe, G. Gelfenbaum
2007, Sedimentary Geology (200) 372-386
Tsunami deposits have been found at more than 60 sites along the Cascadia margin of Western North America, and here we review and synthesize their distribution and sedimentary characteristics based on the published record. Cascadia tsunami deposits are best preserved, and most...
Structure and composition of a watershed-scale sediment information network
W. R. Osterkamp, J. R. Gray, J.B. Laronne, J.R. Martin
2007, International Journal of Sediment Research (22) 238-246
A 'Watershed-Scale Sediment Information Network' (WaSSIN), designed to complement UNESCO's International Sedimentation Initiative, was endorsed as an initial project by the World Association for Sedimentation and Erosion Research. WaSSIN is to address global fluvial-sediment information needs through a network approach based on consistent protocols for the collection, analysis, and storage...
Estimating fishing mortality, natural mortality, and selectivity using recoveries from tagging young fish
H. Jiang, C. Brownie, J.E. Hightower, K. H. Pollock
2007, North American Journal of Fisheries Management (27) 773-781
Current methods for estimation of age- and year-specific instantaneous mortality rates based on multiyear, multiple-age tagging studies assume that it is feasible to tag fish in a wide range of ages. For some species, however, only the youngest one or two age-classes are readily available for tagging. Given the practical...
Differential gene expression induced by exposure of captive mink to fuel oil: A model for the sea otter
Lizabeth Bowen, F. Riva, C. Mohr, B. Aldridge, J. Schwartz, A. Keith Miles, J.L. Stott
2007, EcoHealth (4) 298-309
Free-ranging sea otters are subject to hydrocarbon exposure from a variety of sources, both natural and anthropogenic. Effects of direct exposure to unrefined crude oil, such as that associated with the Exxon Valdez oil spill, are readily apparent. However, the impact of subtle but pathophysiologically relevant concentrations of crude oil...
Kinematic GPS solutions for aircraft trajectories: Identifying and minimizing systematic height errors associated with atmospheric propagation delays
S. Shan, M. Bevis, E. Kendrick, G.L. Mader, D. Raleigh, K. Hudnut, M. Sartori, D. Phillips
2007, Geophysical Research Letters (34)
When kinematic GPS processing software is used to estimate the trajectory of an aircraft, unless the delays imposed on the GPS signals by the atmosphere are either estimated or calibrated via external observations, then vertical height errors of decimeters can occur. This problem is clearly manifested when the aircraft is...
Marine ecoregions of Alaska: Chapter 6.1
John F. Piatt, A.M. Springer
Robert B. Spies, editor(s)
2007, Book chapter, Long-Term Ecological Change in the Northern Gulf of Alaska
Comparative velocity structure of active Hawaiian volcanoes from 3-D onshore-offshore seismic tomography
J. Park, J.K. Morgan, C.A. Zelt, P. G. Okubo, L. Peters, N. Benesh
2007, Earth and Planetary Science Letters (259) 500-516
We present a 3-D P-wave velocity model of the combined subaerial and submarine portions of the southeastern part of the Island of Hawaii, based on first-arrival seismic tomography of marine airgun shots recorded by the onland seismic network. Our model shows that high-velocity materials (6.5-7.0??km/s) lie beneath Kilauea's summit, Koae...
Evidence of lake whitefish spawning in the Detroit River: Implications for habitat and population recovery
E.F. Roseman, G.W. Kennedy, J. Boase, B.A. Manny, T. N. Todd, W. Stott
2007, Journal of Great Lakes Research (33) 397-406
Historic reports imply that the lower Detroit River was once a prolific spawning area for lake whitefish (Coregonus clupeaformis) prior to the construction of the Livingstone shipping channel in 1911. Large numbers of lake whitefish migrated into the river in fall where they spawned on expansive limestone bedrock and gravel...
