R.W. Saltus, C. Gaina
2007, Conference Paper, Eos
[No abstract available]...
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Publication Extents
Not all publications have extents, not all extents are completely accurateJ.M. Conlon, C.R. Bevier, L. Coquet, J. Leprince, T. Jouenne, H. Vaudry, Blake Hossack
2007, Comparative Biochemistry and Physiology, Part D: Genomics and Proteomics (2) 121-125
The tailed frog Ascaphus truei Stejneger, 1899 is the most primitive extant anuran and the sister taxon to the clade of all other living frogs. The species occupies two disjunct ranges in the Northwest region of North America: the Cascade Mountains and coastal area from British Columbia to Northern California,...
Donald P. Althoff, P.S. Althoff, N.D. Lambrecht, P. S. Gipson, J.S. Pontius, P.B. Woodford
2007, Land Degradation and Development (18) 269-288
Mechanized maneuver training impacts the landscape by creating depressions, compacting soils, producing bare ground areas, transporting seeds of invasive plants, and crushing vegetation. We measured 3 physical, 13 chemical, and 2 biological soil properties and used a disturbance index (DI) based on perceptions of soil conditions on a military installation...
Michelle H. Reynolds, L.H. Crampton, M.S. Vekasy
2007, Wildfowl (57) 54-67
Factors influencing breeding initiation of the endangered Laysan Teal Anas laysanensis were studied on Laysan Island in the Hawaiian Islands National Wildlife Refuge between 1998 and 2006. Sixty-two radio-tagged adult females were tracked for 30-180 days to locate and describe their nest sites. In addition, the Laysan Teal were surveyed...
Adam R. Schwindt, G.W. Feist, C.B. Schreck
2007, Environmental Biology of Fishes (80) 453-463
Vitellogenin (Vtg) is a widely used biomarker for xenoestrogen exposure in male fishes. In female fishes Vtg can be negatively affected by stress independent of declines in estrogen. However, few data are available on the effect of stress in male fish abnormally producing Vtg, such as when exposed to xenoestrogens....
R.V. Heermance, J. Chen, D.W. Burbank, C. Wang
2007, Basin Research (19) 599-632
Magnetostratigraphy from the Kashi foreland basin along the southern margin of the Tian Shan in Western China defines the chronology of both sedimentation and the structural evolution of this collisional mountain belt. Eleven magnetostratigraphic sections representing ???13 km of basin strata provide a two- and three-dimensional record of continuous deposition...
J.E. Compton, T.D. Hooker, Steven Perakis
2007, Ecosystems (10) 1197-1208
Stable isotope ratios of terrestrial ecosystem nitrogen (N) pools reflect internal processes and input–output balances. Disturbance generally increases N cycling and loss, yet few studies have examined ecosystem δ15N over a disturbance-recovery sequence. We used a chronosequence approach to examine N distribution and δ15N during forest regrowth after agricultural abandonment....
P. Ruggiero, P.N. Adams, Jonathan Warrick
2007, Conference Paper, Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
Mixed sediment beaches are morphologically distinct from and more complex than either sand or gravel only beaches. Three digital imaging techniques are employed to quantify surficial grain size and bedload sediment transport rates along the mixed sediment beaches of Kachemak Bay, Alaska. Applying digital imaging procedures originally developed for quickly...
T.R. Simons, M.W. Alldredge, K. H. Pollock, J.M. Wettroth
2007, The Auk (124) 986-999
We have developed a system for simulating the conditions of avian surveys in which birds are identified by sound. The system uses a laptop computer to control a set of amplified MP3 players placed at known locations around a survey point. The system can realistically simulate a known population of...
S.T. Gray, Lisa J. Graumlich, J.L. Betancourt
2007, Quaternary Research (68) 18-27
Cores and cross sections from 133 limber pine (Pinus flexilis James) and Douglas fir (Pseudotsuga menziesii (Mirbel) Franco) at four sites were used to estimate annual (July to June) precipitation in the Yellowstone National Park region for the period from AD 1173 to 1998. Examination of the long-term record shows...
H.-J. Stibig, A.S. Belward, P.S. Roy, U. Rosalina-Wasrin, S. Agrawal, P.K. Joshi, Hildanus, R. Beuchle, S. Fritz, S. Mubareka, S. Giri
2007, Journal of Biogeography (34) 625-637
Aim Our aim was to produce a uniform ‘regional’ land-cover map of South and Southeast Asia based on ‘sub-regional’ mapping results generated in the context of the Global Land Cover 2000 project.Location The ‘region’ of tropical and sub-tropical South and Southeast Asia stretches from the Himalayas and the southern border...
T.D. Williams, N. Warnock, John Y. Takekawa, M.A. Bishop
2007, The Auk (124) 886-897
We combined radiotelemetry, plasma metabolite analyses, and macro-invertebrate prey sampling to investigate variation in putative fattening rates (estimated as plasma triglyceride levels) at the flyway scale in Western Sandpipers (Calidris mauri) migrating between Punta Banda, Mexico (31°N), and Hartney Bay, Alaska (60°N), a distance of 4,240 km. Birds were caught...
M.F. Sohn, Shannon A. Mahan, J.R. Knott, D.D. Bowman
2007, Quaternary International (166) 49-60
Controversy exists over whether alluvial-fan sedimentation along tectonically active mountain fronts is driven by climatic changes or tectonics. Knowing the age of sedimentation is the key to understanding the relationship between sedimentation and its cause. Alluvial-fan deposits in Death Valley and throughout the arid southwestern United States have long been...
T. Fickert, D. Friend, F. Gruninger, B. F. Molnia, M. Richter
2007, Arctic, Antarctic, and Alpine Research (39) 245-257
This study proposes a new hypothesis: Debris-covered glaciers served as Pleistocene biological refugia. This is based on detailed studies of vascular plant growth on six debris-mantled glaciers, literally around the world, as well as many casual observations also across the globe. We find that such glaciers are quite common and...
J.M. Craig, Margret Ann Chriscinske
2007, Entomological News (118) 313-314
[No abstract available]...
C.K. Dodd Jr., S. Y. Johnson
2007, Herpetological Review (38) 150-152
[No abstract available]...
Shannon A. Mahan, David M. Miller, Christopher M. Menges, J.C. Yount
2007, Quaternary International (166) 61-78
The chronology of the Holocene and late Pleistocene deposits of the northeastern Mojave Desert have been largely obtained using radiocarbon ages. Our study refines and extends this framework using optically stimulated luminescence (OSL) to date deposits from Valjean Valley, Silurian Lake Playa, Red Pass, and California Valley. Of particular interest...
M.K. Dubois, Geoffrey C. Bohling, S. Chakrabarti
2007, Computers & Geosciences (33) 599-617
In this study, seven classifiers based on four different approaches were tested in a rock facies classification problem: classical parametric methods using Bayes' rule, and non-parametric methods using fuzzy logic, k-nearest neighbor, and feed forward-back propagating artificial neural network. Determining the most effective classifier for geologic facies prediction in wells...
L.D.S.L. Sternberg, S.Y. Teh, S.M.L. Ewe, F. R. Miralles-Wilhelm, Donald L. DeAngelis
2007, Ecosystems (10) 648-660
The boundaries between mangroves and freshwater hammocks in coastal ecotones of South Florida are sharp. Further, previous studies indicate that there is a discontinuity in plant predawn water potentials, with woody plants either showing predawn water potentials reflecting exposure to saline water or exposure to freshwater. This abrupt concurrent change...
M.M. Hedman, J.A. Burns, M.R. Showalter, C.C. Porco, P. D. Nicholson, A.S. Bosh, Matthew S. Tiscareno, R. H. Brown, Bonnie J. Buratti, K. H. Baines, R. N. Clark
2007, Icarus (188) 89-107
The Cassini spacecraft has provided the first clear images of the D ring since the Voyager missions. These observations show that the structure of the D ring has undergone significant changes over the last 25 years. The brightest of the three ringlets seen in the Voyager images (named D72), has...
D.C. Laughlin, Scott R. Abella, W.W. Covington, James B. Grace
2007, Journal of Vegetation Science (18) 231-242
Question: How are the effects of mineral soil properties on understory plant species richness propagated through a network of processes involving the forest overstory, soil organic matter, soil nitrogen, and understory plant abundance? Location: North-central Arizona, USA. Methods: We sampled 75 0.05-ha plots across a broad soil gradient in a...
S.K. Auer, R.D. Bassar, J.J. Fontaine, T. E. Martin
2007, Condor (109) 321-333
The breeding ecology of south temperate bird species is less widely known than that of north temperate species, yet because they comprise a large portion of the world's avian diversity, knowledge of their breeding ecology can contribute to a more comprehensive understanding of the geographic diversity of avian reproductive traits...
Anthony C. Runkel, J.F. Miller, R.M. McKay, A. R. Palmer, John W. Taylor
2007, Geological Society of America Bulletin (119) 860-881
Well-known difficulties in applying sequence stratigraphic concepts to deposits that accumulated across slowly subsiding cratonic interior regions have limited our ability to interpret the history of continental-scale tectonism, oceanographic dynamics of epeiric seas, and eustasy. We used a multi-disciplinary approach to construct a high-resolution stratigraphic framework for lower Paleozoic strata...
M. G. Walsh, D.E. Dittman, Robert O'Gorman
2007, Journal of Great Lakes Research (33) 83-92
Little is known about the ecology of round goby (Neogobius melanostomus), an invasive benthic fish, in the profundal zone of the Great Lakes. In April 2002–2005 we caught increasing numbers of round gobies with a bottom trawl in the 45–150 m depth range of southwestern Lake Ontario. In 2005, we...
B.A. Ray, T.R. Hrabik, Mark P. Ebener, O. T. Gorman, D.R. Schreiner, S.T. Schram, S.P. Sitar, W.P. Mattes, C.R. Bronte
2007, Journal of Great Lakes Research (33) 104-113
We describe the diet and prey selectivity of lean (Salvelinus namaycush namaycush) and siscowet lake trout (S. n. siscowet) collected during spring (April–June) from Lake Superior during 1986–2001. We estimated prey selectivity by comparing prey numerical abundance estimates from spring bottom trawl surveys and lake trout diet information in similar...