Gopherus agassizii (Agassiz’s desert tortoise). scute dysecdysis/scute sloughing
Kenneth E. Nussear, K. Kristina Drake, Phil A. Medica, Todd C. Esque
2012, Herpetological Review (43) 473-474
Desert tortoises with scute injuries due to fire or disease related processes can result in loss of the scute. These animals appear to function normally, and can replace the scute material with a keratinized layer that covers the bone. This paper describes a tortoise with severe scute loss from a...
Application of radiotelemetry to wildlife conservation in mountainous Asian landscapes
M.S. Mitchell, L.N. Rich, L. S. Mills
2012, Book chapter, Wildlife Research Techniques in Rugged Mountainous Asian Landscapes
Invertebrate assemblages in the lower Klamath River, with reference to Manayunkia speciosa
David M. Malakauskas, Margaret A. Wilzbach
2012, California Fish and Game (98) 214-235
The freshwater polychaete, Manayunkia speciosa Leidy (Canalipalpata Sabellidae), is the intermediate host for two myxozoan pathogens (Ceratomyxa shasta and Parvicapsula minibicornis) that cause substantial mortalities of juvenile salmon in the Pacific Northwest, particularly in the Klamath River below Iron Gate Dam in California. Information on the distribution of M. speciosa...
Evidence of cryptic individual specialization in an opportunistic insectivorous bat
Paul M. Cryan, Craig A. Stricker, Michael B. Wunder
2012, Journal of Mammalogy (93) 381-389
Habitat use and feeding behaviors of cryptic animals are often poorly understood. Analyses of stable isotope ratios in animal body tissues can help reveal an individual's location and resource use during tissue growth. We investigated variation in stable isotope ratios of 4 elements (H, C, N, and S) in the...
A graphical method to evaluate predominant geochemical processes occurring in groundwater systems for radiocarbon dating
Liang-Feng Han, Niel Plummer, Pradeep Aggarwal
2012, Chemical Geology (318-319) 88-112
A graphical method is described for identifying geochemical reactions needed in the interpretation of radiocarbon age in groundwater systems. Graphs are constructed by plotting the measured 14C, δ13C, and concentration of dissolved inorganic carbon and are interpreted according to specific criteria to recognize water samples that are consistent with a...
Linking soil moisture balance and source-responsive models to estimate diffuse and preferential components of groundwater recharge
M.O. Cuthbert, R. Mackay, J. R. Nimmo
2012, Hydrology and Earth System Sciences (9) 8455-8492
Results are presented of a detailed study into the vadose zone and shallow water table hydrodynamics of a field site in Shropshire, UK. A conceptual model is developed and tested using a range of numerical models, including a modified soil moisture balance model (SMBM) for estimating groundwater recharge in the...
Discussion of “Deglacial paleoclimate in the southwestern United States: an abrupt 18.6 cold event and evidence for a North Atlantic forcing of Termination I” by M.S. Lachniet, Y. Asmerom and V. Polyak
Isaac J. Winograd
2012, Quaternary Science Reviews (45) 126-128
Utilizing a stable isotopic time series obtained from a speleothem (PC-1), which grew between 20.1 and 15.6 ka, Lachniet, Asmeron and Polyak (2011; hereafter LAP) present evidence for a significant cold event in the southern Great Basin at 18.6 ka, a finding that we accept. Supplementing this short record with...
Strontium isotope systematics of mixing groundwater and oil-field brine at Goose Lake in northeastern Montana, USA
Zell E. Peterman, Joanna N. Thamke, Kiyoto Futa, Todd Preston
2012, Applied Geochemistry (27) 2403-2408
Groundwater, surface water, and soil in the Goose Lake oil field in northeastern Montana have been affected by Cl−-rich oil-field brines during long-term petroleum production. Ongoing multidisciplinary geochemical and geophysical studies have identified the degree and local extent of interaction between brine and groundwater. Fourteen samples representing groundwater, surface water,...
Bulk rock composition and geochemistry of olivine-hosted melt inclusions in the Grey Porri Tuff and selected lavas of the Monte dei Porri volcano, Salina, Aeolian Islands, southern Italy
Angela L. Doherty, Robert J. Bodnar, Benedetto De Vivo, Wendy A. Bohrson, Harvey E. Belkin, Antonia Messina, Robert J. Tracy
2012, Central European Journal of Geosciences (4) 338-355
The Aeolian Islands are an arcuate chain of submarine seamounts and volcanic islands, lying just north of Sicily in southern Italy. The second largest of the islands, Salina, exhibits a wide range of compositional variation in its erupted products, from basaltic lavas to rhyolitic pumice. The Monte dei Porri eruptions...
Mineral resource of the month: rhenium
Desiree E. Polyak
2012, Earth (57) 25-25
Rhenium, a silvery-white, heat resistant metal, has increased significantly in importance since its discovery in 1925. First isolated by a team of German chemists studying platinum ore, the mineral was named for the Rhine River. From 1925 until the 1960s, only two metric tons of rhenium were produced worldwide. Since...
Advances in carbonate exploration and reservoir analysis
J. Garland, J.E. Neilson, S.E. Laubach, Katherine J. Whidden, editor(s)
2012, Book
Carbonate reservoirs contain an increasingly important percentage of the world’s hydrocarbon reserves. This volume presents key recent advances in carbonate exploration and reservoir analysis. As well as a comprehensive overview of the trends in carbonate over the years, the volume focuses on four key areas: (1) emerging plays and techniques with...
Rare earths, the lanthanides, yttrium and scandium
G. Bedinger, D. Bleiwas
2012, Mining Engineering (64) 86-88
In 2011, rare earths were recovered from bastnasite concentrates at the Mountain Pass Mine in California. Consumption of refined rare-earth products decreased in 2011 from 2010. U.S. rare-earth imports originated primarily from China, with lesser amounts from Austria, Estonia, France and Japan. The United States imported all of its demand...
A brief review of the construction aggregates market
Jason Christopher Willett
2012, Stone, Sand & Gravel Review (2012) 25-27
The U.S. Geological Survey defines the construction aggregates industry as those companies that mine and process crushed stone and/or construction sand and gravel. Aggregates have been used from the earliest times of our civilization for a variety of purposes - construction being the major use. As construction aggregates, crushed stone...
Evidence of late-summer mating readiness and early sexual maturation in migratory tree-roosting bats found dead at wind turbines
P.M. Cryan, J.W. Jameson, E.F. Baerwald, C.K.R. Willis, R.M.R. Barclay, E.A. Snider, E.G. Crichton
2012, PLoS ONE (7)
Understanding animal mating systems is an important component of their conservation, yet the precise mating times for many species of bats are unknown. The aim of this study was to better understand the details and timing of reproductive events in species of bats that die most frequently at wind turbines...
Explaining reported puma-related behaviors and behavioral intentions among northern Arizona residents
David J. Mattson, Elizabeth J. Ruther
2012, Human Dimensions of Wildlife: An International Journal (17) 91-111
Management of pumas in the American West is typified by conflict among stakeholders plausibly rooted in life experiences and worldviews. We used a mail questionnaire to assess demographics, nature-views, puma-related life experiences and behaviors, and support for puma-related policies among residents of northern Arizona. Data from the questionnaire (n = 693 respondents)...
Type E botulism outbreaks: a manual for beach managers and the public
2012, Book
The Great Lakes basin has undergone a resurgence of Type E botulism (often referred to as avian botulism) in recent years, characterized by dead birds and fish along the shores of the Great Lakes. The number of deaths and areas affected appear to be increasing to levels that induce concern...
Impacts of rural development on Yellowstone wildlife: linking grizzly bear Ursus arctos demographics with projected residential growth
Charles C. Schwartz, Patricia H. Gude, Lisa Landenburger, Mark A. Haroldson, Shannon Podruzny
2012, Wildlife Biology (18) 246-257
Exurban development is consuming wildlife habitat within the Greater Yellowstone Ecosystem with potential consequences to the long-term conservation of grizzly bears Ursus arctos. We assessed the impacts of alternative future land-use scenarios by linking an existing regression-based simulation model predicting rural development with a spatially explicit model that predicted bear...
Context-dependent planktivory: interacting effects of turbidity and predation risk on adaptive foraging
Kevin L. Pangle, Timothy D. Malinich, David B. Bunnell, Dennis R. DeVries, Stuart A. Ludsin
2012, Ecosphere (3)
By shaping species interactions, adaptive phenotypic plasticity can profoundly influence ecosystems. Predicting such outcomes has proven difficult, however, owing in part to the dependence of plasticity on the environmental context. Of particular relevance are environmental factors that affect sensory performance in organisms in ways that alter the tradeoffs associated with...
Ages of pre-rift basement and synrift rocks along the conjugate rift and transform margins of the Argintine Precordillera and Laurentia
William A. Thomas, Robert D. Tucker, Ricardo A. Astini, Rodger E. Denison
2012, Geosphere (8) 1366-1383
New geochronologic data from basement rocks support the interpretation that the Argentine Precordillera (Cuyania) terrane was rifted from the Ouachita embayment of the Iapetan margin of Laurentia. New data from the Ozark dome show a range of ages in two groups at 1466 ± 3 to 1462 ± 1 Ma...
Carbon dioxide stripping in aquaculture -- part III: model verification
John Colt, Barnaby Watten, Tim Pfeiffer
2012, Aquacultural Engineering (47) 47-59
Based on conventional mass transfer models developed for oxygen, the use of the non-linear ASCE method, 2-point method, and one parameter linear-regression method were evaluated for carbon dioxide stripping data. For values of KLaCO2 < approximately 1.5/h, the 2-point or ASCE method are a good fit to experimental data, but...
Assessing sloth bears as surrogates for carnivore conservation in Sri Lanka
Shyamala Ratnayeke, Frank T. van Manen
2012, Ursus (23) 206-217
Bears are large, charismatic mammals whose presence often garners conservation attention. Because healthy bear populations typically require large, contiguous areas of habitat, land conservation actions often are assumed to benefit co-occurring species, including other mammalian carnivores. However, we are not aware of an empirical test of this assumption. We used...
Cui-ui reproductive success from potential egg deposition to larval emigration
G. Gary Scoppettone, Peter H. Rissler
2012, Western North American Naturalist (72) 288-295
From 1985 to 2006, we tracked cui-ui, Chasmistes cujus, survival from potential egg deposition of migrating spawners to emigrating larvae. Tahoe sucker larvae emigrated to Pyramid Lake the same time as cui-ui larvae, but cui-ui was the predominant catostomid larvae we captured. Survival of cui-ui larvae ranged from 0.46% to...
Estimating occupancy in large landscapes: evaluation of amphibian monitoring in the greater Yellowstone ecosystem
William R. Gould, Debra A. Patla, Rob Daley, Paul Stephen Corn, Blake R. Hossack, Robert E. Bennetts, Charles R. Peterson
2012, Wetlands (32) 379-389
Monitoring of natural resources is crucial to ecosystem conservation, and yet it can pose many challenges. Annual surveys for amphibian breeding occupancy were conducted in Yellowstone and Grand Teton National Parks over a 4-year period (2006–2009) at two scales: catchments (portions of watersheds) and individual wetland sites. Catchments were selected...
Water-resources data for the United States: water year 2012
Water Resources Division, U.S. Geological Survey
2012, Water Data Report 2012
Water resources data are published annually for use by engineers, scientists, managers, educators, and the general public. These archival products supplement direct access to current and historical water data provided by NWISWeb. Beginning with Water Year 2006, annual water data reports are available as individual electronic Site Data Sheets for...
Farallon slab detachment and deformation of the Magdalena Shelf, southern Baja California
Daniel S. Brothers, Alistair J. Harding, Antonio Gonzalez-Fernandez, W.S. Steven Holbrook, Graham M. Kent, Neal W. Driscoll, John M. Fletcher, Daniel Lizarralde, Paul J. Umhoefer, Gary Axen
2012, Geophysical Research Letters (39)
Subduction of the Farallon plate beneath northwestern Mexico stalled by ~12 Ma when the Pacific-Farallon spreading-ridge approached the subduction zone. Coupling between remnant slab and the overriding North American plate played an important role in the capture of the Baja California (BC) microplate by the Pacific Plate. Active-source seismic reflection...
