Population dynamics of spotted owls in the Sierra Nevada, California
J.A. Blakesley, M.E. Seamans, M.M. Conner, A.B. Franklin, Gary C. White, R. J. Gutierrez, J.E. Hines, J.D. Nichols, T.E. Munton, D.W.H. Shaw, J.J. Keane, G.N. Steger, T. L. McDonald
2010, Wildlife Monographs 1-36
The California spotted owl (Strix occidentalis occidentalis) is the only spotted owl subspecies not listed as threatened or endangered under the United States Endangered Species Act despite petitions to list it as threatened. We conducted a meta-analysis of population data for 4 populations in the southern Cascades and Sierra Nevada,...
Persistence of canine distemper virus in the Greater Yellowstone Ecosystem's carnivore community
Emily S. Almberg, Paul C. Cross, D.W. Smith
2010, Ecological Applications (20) 2058-2074
Canine distemper virus (CDV) is an acute, highly immunizing pathogen that should require high densities and large populations of hosts for long-term persistence, yet CDV persists among terrestrial carnivores with small, patchily distributed groups. We used CDV in the Greater Yellowstone ecosystem's (GYE) wolves (Canis lupus) and coyotes (Canis latrans)...
High resolution near-bed observations in winter near Cape Hatteras, North Carolina
Marinna A. Martini, Brandy N. Armstrong, John C. Warner
2010, Conference Paper, OCEANS 2009, MTS/IEEE Biloxi - Marine Technology for Our Future: Global and Local Challenges
The U.S. Geological Survey (USGS) Coastal and Marine Science Center in Woods Hole, Massachusetts, is leading an effort to understand the regional sediment dynamics along the coastline of North and South Carolina. As part of the Carolinas Coastal Change Processes Project, a geologic framework study in June of 2008 by...
Late Hesperian plains formation and degradation in a low sedimentation zone of the northern lowlands of Mars
J.A.P. Rodriguez, K. L. Tanaka, D.C. Berman, J.S. Kargel
2010, Icarus (210) 116-134
The plains materials that form the martian northern lowlands suggest large-scale sedimentation in this part of the planet. The general view is that these sedimentary materials were transported from zones of highland erosion via outflow channels and other fluvial systems. The study region, the northern circum-polar plains south of Gemini...
Sage-grouse habitat selection during winter in Alberta
Jennifer L. Carpenter, Cameron L. Aldridge, Mark S. Boyce
2010, Journal of Wildlife Management (74) 1806-1814
Greater sage-grouse (Centrocercus urophasianus) are dependent on sagebrush (Artemisia spp.) for food and shelter during winter, yet few studies have assessed winter habitat selection, particularly at scales applicable to conservation planning. Small changes to availability of winter habitats have caused drastic reductions in some sage-grouse populations. We modeled winter habitat...
Estimating the empirical probability of submarine landslide occurrence
Eric L. Geist, Thomas E. Parsons
David C. Mosher, Craig Shipp, Lorena Moscardelli, Jason D. Chaytor, Christopher D. P. Baxter, Homa J. Lee, Roger Urgeles, editor(s)
2010, Book chapter, Submarine mass movements and their consequences
The empirical probability for the occurrence of submarine landslides at a given location can be estimated from age dates of past landslides. In this study, tools developed to estimate earthquake probability from paleoseismic horizons are adapted to estimate submarine landslide probability. In both types of estimates, one has to account...
Phosphorus dynamics in soils irrigated with reclaimed waste water or fresh water - A study using oxygen isotopic composition of phosphate
I. Zohar, A. Shaviv, M. Young, Carol Kendall, Steven R. Silva, A. Paytan
2010, Geoderma (159) 109-121
Transformations of phosphate (Pi) in different soil fractions were tracked using the stable isotopic composition of oxygen in phosphate (δ18Op) and Pi concentrations. Clay soil from Israel was treated with either reclaimed waste water (secondary, low grade) or with fresh water amended with a chemical fertilizer of a known isotopic...
Estimating aboveground biomass for broadleaf woody plants and young conifers in Sierra Nevada, California, forests
T.W. McGinnis, C.D. Shook, Jon E. Keeley
2010, Western Journal of Applied Forestry (25) 203-209
Quantification of biomass is fundamental to a wide range of research and natural resource management goals. An accurate estimation of plant biomass is essential to predict potential fire behavior, calculate carbon sequestration for global climate change research, assess critical wildlife habitat, and so forth. Reliable allometric equations from simple field...
The sedimentology and dynamics of crater-affiliated wind streaks in western Arabia Terra, Mars and Patagonia, Argentina
J.A.P. Rodriguez, K. L. Tanaka, A. Yamamoto, D.C. Berman, J. R. Zimbelman, J.S. Kargel, S. Sasaki, Y. Jinguo, H. Miyamoto
2010, Geomorphology (121) 30-54
Wind streaks comprise recent aeolian deposits that have been extensively documented on Venus, Earth and Mars. Martian wind streaks are among the most abundant surface features on the planet and commonly extend from the downwind margins of impact craters. Previous studies of wind streaks emerging from crater interior deposits suggested...
A comparison of multi-spectral, multi-angular, and multi-temporal remote sensing datasets for fractional shrub canopy mapping in Arctic Alaska
D.J. Selkowitz
2010, Remote Sensing of Environment (114) 1338-1352
Shrub cover appears to be increasing across many areas of the Arctic tundra biome, and increasing shrub cover in the Arctic has the potential to significantly impact global carbon budgets and the global climate system. For most of the Arctic, however, there is no existing baseline inventory of shrub canopy...
Use of multiple dispersal pathways facilitates amphibian persistence in stream networks
Grant E.H. Campbell, J.D. Nichols, W.H. Lowe, W.F. Fagan
2010, Proceedings of the National Academy of Sciences of the United States of America (107) 6936-6940
Although populations of amphibians are declining worldwide, there is no evidence that salamanders occupying small streams are experiencing enigmatic declines, and populations of these species seem stable. Theory predicts that dispersal through multiple pathways can stabilize populations, preventing extinction in habitat networks. However, empirical data to support this prediction are...
Sampling and analysis of emerging pollutants
Tammy L. Jones-Lepp, David A. Alvarez
Yuncong Li, Kati W. Migliaccio, editor(s)
2010, Book chapter, Water quality concepts, sampling, and analyses
No abstract available. ...
Repeat photography and low-elevation fire responses in the southwestern United States
Raymond M. Turner, Robert H. Webb, Todd C. Esque, Garry F. Rogers
Robert H. Webb, Diane E. Boyer, Raymond M. Turner, editor(s)
2010, Book chapter, Repeat photography methods and applications in the natural sciences
Direct and indirect responses of tallgrass prairie butterflies to prescribed burning
Jennifer A. Vogel, Rolf R. Koford, Diane M. Debinski
2010, Journal of Insect Conservation (14) 663-677
Fire is an important tool in the conservation and restoration of tallgrass prairie ecosystems. We investigated how both the vegetation composition and butterfly community of tallgrass prairie remnants changed in relation to the elapsed time (in months) since prescribed fire. Butterfly richness and butterfly abundance were positively correlated with the...
Abundances and distribution of minerals and elements in high-alumina coal fly ash from the Jungar Power Plant, Inner Mongolia, China
S. Dai, L. Zhao, S. Peng, C. L. Chou, X. Wang, Y. Zhang, D. Li, Y. Sun
2010, International Journal of Coal Geology (81) 320-332
The fly ash from the Jungar Power Plant, Inner Mongolia, China, is unique because it is highly enriched in alumina (Al2O3>50%). The fly ash mainly consists of amorphous glass and mullite and trace amounts of corundum, quartz, char, calcite, K-feldspar, clay minerals, and Fe-bearing minerals. The mullite content in fly...
Surface-wave potential for triggering tectonic (nonvolcanic) tremor
D.P. Hill
2010, Bulletin of the Seismological Society of America (100) 1859-1878
Source processes commonly posed to explain instances of remote dynamic triggering of tectonic (nonvolcanic) tremor by surface waves include frictional failure and various modes of fluid activation. The relative potential for Love- and Rayleigh-wave dynamic stresses to trigger tectonic tremor through failure on critically stressed thrust and vertical strike-slip faults...
Comment on "near-surface location, geometry, and velocities of the santa monica fault zone, Los Angeles, California" by R. D. catchings, G. gandhok, M. R. goldman, D. okaya, M. J. rymer and G. W. bawden
T. L. Pratt, J.F. Dolan
2010, Bulletin of the Seismological Society of America (100) 2329-2337
[No abstract available]...
Quantifying data worth toward reducing predictive uncertainty
A.M. Dausman, J. Doherty, C.D. Langevin, M.C. Sukop
2010, Ground Water (48) 729-740
The present study demonstrates a methodology for optimization of environmental data acquisition. Based on the premise that the worth of data increases in proportion to its ability to reduce the uncertainty of key model predictions, the methodology can be used to compare the worth of different data types, gathered at...
Precise estimation of repeating earthquake moment: Example from parkfield, california
J.L. Rubinstein, W.L. Ellsworth
2010, Bulletin of the Seismological Society of America (100) 1952-1961
We offer a new method for estimating the relative size of repeating earthquakes using the singular value decomposition (SVD). This method takes advantage of the highly coherent waveforms of repeating earthquakes and arrives at far more precise and accurate descriptions of earthquake size than standard catalog techniques allow. We demonstrate...
A simple physical model for deep moonquake occurrence times
R.C. Weber, B.G. Bills, C.L. Johnson
2010, Physics of the Earth and Planetary Interiors (182) 152-160
The physical process that results in moonquakes is not yet fully understood. The periodic occurrence times of events from individual clusters are clearly related to tidal stress, but also exhibit departures from the temporal regularity this relationship would seem to imply. Even simplified models that capture some of the relevant...
Landscape influences on genetic differentiation among bull trout populations in a stream-lake network
M.H. Meeuwig, C.S. Guy, S.T. Kalinowski, W.A. Fredenberg
2010, Molecular Ecology (19) 3620-3633
This study examined the influence of landscape heterogeneity on genetic differentiation between migratory bull trout (Salvelinus confluentus) populations in Glacier National Park, Montana. An information-theoretic approach was used to compare different conceptual models of dispersal associated with barriers, different models of isolation by distance, and the combined effects of barriers,...
Effects of exploitation on black bear populations at White River National Wildlife Refuge
J. D. Clark, R. Eastridge, M.J. Hooker
2010, Journal of Wildlife Management (74) 1448-1456
We live-trapped American black bears (Ursus americanus) and sampled DNA from hair at White River National Wildlife Refuge, Arkansas, USA, to estimate annual population size (N), growth (λ), and density. We estimated N and λ with open population models, based on live-trapping data collected from 1998 through 2006, and robust...
Using chloride and other ions to trace sewage and road salt in the Illinois Waterway
W.R. Kelly, S.V. Panno, Keith C. Hackley, H.-H. Hwang, A.T. Martinsek, M. Markus
2010, Applied Geochemistry (25) 661-673
Chloride concentrations in waterways of northern USA are increasing at alarming rates and road salt is commonly assumed to be the cause. However, there are additional sources of Cl- in metropolitan areas, such as treated wastewater (TWW) and water conditioning salts, which may be contributing to Cl- loads entering surface...
Hydrothermal heat discharge in the Cascade Range, northwestern United States
S. E. Ingebritsen, Robert H. Mariner
2010, Journal of Volcanology and Geothermal Research (196) 208-218
Hydrothermal heat discharge in the Cascade Range includes the heat discharged by thermal springs, by "slightly thermal" springs that are only a few degrees warmer than ambient temperature, and by fumaroles. Thermal-spring heat discharge is calculated on the basis of chloride-flux measurements and geothermometer temperatures and totals ~ 240 MW...
Phylogeography of wolves (Canis lupus) in the Pacific Northwest
Byron V. Weckworth, Sandra L. Talbot, Joseph A. Cook
2010, Journal of Mammalogy (91) 363-375
Glacial cycles in the late Pleistocene played a dominant role in sculpting the evolutionary histories of many high-latitude organisms. The refugial hypothesis argues that populations retracted during glacial maxima and were isolated in separate refugia. One prediction of this hypothesis is that populations inhabiting different refugia diverged and then, during...
