Occupancy and abundance of wintering birds in a dynamic agricultural landscape
M.W. Miller, E.V. Pearlstine, Robert Dorazio, F.J. Mazzotti
2011, Journal of Wildlife Management (75) 751-761
Effective monitoring programs are designed to track changes in the distribution, occurrence, and abundance of species. We developed an extension of Royle and Kéry's (2007) single species model to estimate simultaneously temporal changes in probabilities of detection, occupancy, colonization, extinction, and species turnover using data on calling anuran amphibians, collected...
Mortality of Siberian polecats and black-footed ferrets released onto prairie dog colonies
E. Biggins, B.J. Miller, Louis R. Hanebury, R. A. Powell
2011, Journal of Mammalogy (92) 721-731
Black-footed ferrets (Mustela nigripes) likely were extirpated from the wild in 1985–1986, and their repatriation depends on captive breeding and reintroduction. Postrelease survival of animals can be affected by behavioral changes induced by captivity. We released neutered Siberian polecats (M. eversmanii), close relatives of ferrets, in 1989–1990 on black-tailed prairie...
Quantification of a greenhouse hydrologic cycle from equatorial to polar latitudes: The mid-Cretaceous water bearer revisited
M.B. Suarez, Luis A. Gonzalez, Greg A. Ludvigson
2011, Palaeogeography, Palaeoclimatology, Palaeoecology (307) 301-312
This study aims to investigate the global hydrologic cycle during the mid-Cretaceous greenhouse by utilizing the oxygen isotopic composition of pedogenic carbonates (calcite and siderite) as proxies for the oxygen isotopic composition of precipitation. The data set builds on the Aptian–Albian sphaerosiderite δ18O data set presented by Ufnar et...
Characterization of winter foraging locations of Adélie penguins along the Western Antarctic Peninsula, 2001–2002
Eric S. Erdmann, Christine Ribic, Donna L. Patterson-Fraser, William R. Fraser
2011, Deep-Sea Research Part II: Topical Studies in Oceanography (58) 1710-1718
In accord with the hypotheses driving the Southern Ocean Global Ocean Ecosystems Dynamics (SO GLOBEC) program, we tested the hypothesis that the winter foraging ecology of a major top predator in waters off the Western Antarctic Peninsula (WAP), the Adélie penguin (Pygoscelis adeliae), is constrained by oceanographic features related to...
Probing magnetic bottom and crustal temperature variations along the Red Sea margin of Egypt
D. Ravat, A. Salem, A.M.S. Abdelaziz, E. Elawadi, P. Morgan
2011, Tectonophysics (510) 337-344
Over 50 magnetic bottom depths derived from spectra of magnetic anomalies in Eastern Egypt along the Red Sea margin show variable magnetic bottoms ranging from 10 to 34 km. The deep magnetic bottoms correspond more closely to the Moho depth in the region, and not the depth of 580 °C, which lies...
Human dignity in concept and practice
D.J. Mattson, S.G. Clark
2011, Policy Sciences (44) 303-319
Dignity seems to be something that virtually all people want. It is a seminal expression of the human experience that gains authority through the convergent demands of people worldwide. Even so, the human dignity concept is in unhelpful disarray. Dignity is variously viewed as an antecedent, a consequence, a value,...
Reanalysis of in situ permeability measurements in the Barbados décollement
B.A. Bekins, D. Matmon, E.J. Screaton, K. M. Brown
2011, Geofluids (11) 57-70
A cased and sealed borehole in the Northern Barbados accretionary complex was the site of the first attempts to measure permeability in situ along a plate boundary décollement. Three separate efforts at Hole 949C yielded permeability estimates for the décollement spanning four orders of magnitude. An analysis of problems encountered during installation...
Fe-Ni metal and sulfide minerals in CM chondrites: An indicator for thermal history
M. Kimura, Jeffrey N. Grossman, M.K. Weisberg
2011, Meteoritics and Planetary Science (46) 431-442
CM chondrites were subjected to aqueous alteration and, in some cases, to secondary metamorphic heating. The effects of these processes vary widely, and have mainly been documented in silicate phases. Herein, we report the characteristic features of Fe‐Ni metal and sulfide phases in 13 CM and 2 CM‐related chondrites to...
Short-term effects of burn season on flowering phenology of savanna plants
N.B. Pavlovic, S. A. Leicht-Young, R. Grundel
2011, Plant Ecology (212) 611-625
We examined the effect of season of burn on flowering phenology of groundlayer species, in the year following burns, in a mesic-sand Midwestern oak savanna. Burn treatments were fall, early-season, growing-season, late-season, and 1 or 5 years after a prior early-season wildfire. For these treatments, we compared the number of...
The angus mammoth: A decades-old scientific controversy resolved
Steven R. Holen, D.W. May, Shannon A. Mahan
2011, American Antiquity (76) 487-499
The Angus Mammoth site in south-central Nebraska has been controversial since its discovery in 1931 when a fluted artifact was reported to be associated with the mammoth. For nearly 80 years it has not been known if Angus was a paleontological site predating the human occupation of North America as...
Chronological framework for the deglaciation of the Lake Michigan lobe of the Laurentide ice sheet from ice-walled lake deposits
B. Curry, J. Petras
2011, Journal of Quaternary Science (26) 402-410
A revised chronological framework for the deglaciation of the Lake Michigan lobe of the south‐central Laurentide Ice Sheet is presented based on radiocarbon ages of plant macrofossils archived in the sediments of low‐relief ice‐walled lakes. We analyze the precision and accuracy of 15 AMS 14C ages of plant macrofossils obtained from...
On the use of log-transformation vs. nonlinear regression for analyzing biological power laws
X. Xiao, E.P. White, M.B. Hooten, S.L. Durham
2011, Ecology (92) 1887-1894
Power‐law relationships are among the most well‐studied functional relationships in biology. Recently the common practice of fitting power laws using linear regression (LR) on log‐transformed data has been criticized, calling into question the conclusions of hundreds of studies. It has been suggested that nonlinear regression (NLR) is preferable, but no...
Alteration of streamflow magnitudes and potential ecological consequences: A multiregional assessment
Daren M. Carlisle, David M. Wolock, Michael R. Meador
2011, Frontiers in Ecology and the Environment (9) 264-270
Human impacts on watershed hydrology are widespread in the US, but the prevalence and severity of stream‐flow alteration and its potential ecological consequences have not been quantified on a national scale. We assessed streamflow alteration at 2888 streamflow monitoring sites throughout the conterminous US. The magnitudes of mean annual (1980–2007)...
Ages and sources of components of Zn-Pb, Cu, precious metal, and platinum group element deposits in the goodsprings district, Clark County, Nevada
Peter G. Vikre, Quentin J. Browne, Robert J. Fleck, Albert H. Hofstra, Joseph L. Wooden
2011, Economic Geology (106) 381-412
The Goodsprings district, Clark County, Nevada, includes zinc-dominant carbonate replacement deposits of probable late Paleozoic age, and lead-dominant carbonate replacement deposits, copper ± precious metal-platinum group element (PGE) deposits, and gold ± silver deposits that are spatially associated with Late Triassic porphyritic intrusions. The district encompasses ~500 km2 although the...
A Regional Modeling Framework of Phosphorus Sources and Transport in Streams of the Southeastern United States
A.M. Garcia, A.B. Hoos, S. Terziotti
2011, Journal of the American Water Resources Association (47) 991-1010
We applied the SPARROW model to estimate phosphorus transport from catchments to stream reaches and subsequent delivery to major receiving water bodies in the Southeastern United States (U.S.). We show that six source variables and five land‐to‐water transport variables are significant (p < 0.05) in explaining 67% of the variability in long‐term...
Trophic ecology and gill raker morphology of seven catostomid species in Iowa rivers
J.R. Spiegel, M.C. Quist, J.E. Morris
2011, Journal of Applied Ichthyology (27) 1159-1164
Understanding the trophic ecology of closely‐related species is important for providing insight on inter‐specific competition and resource partitioning. Although catostomids often dominate fish assemblages in lotic systems, little research has been conducted on their ecology. This study was developed to provide information on the trophic ecology of catostomids in several...
Microbial community structure of hydrothermal deposits from geochemically different vent fields along the Mid-Atlantic Ridge
Gilberto E. Flores, James H. Campbell, Julie D. Kirshtein, Jennifer Meneghin, Mircea Podar, Joshua I. Steinberg, Jeffrey S. Seewald, Margaret Kingston Tivey, Mary A. Voytek, Zamin K. Yang, Anna-Louise Reysenbach
2011, Environmental Microbiology (13) 2158-2171
To evaluate the effects of local fluid geochemistry on microbial communities associated with active hydrothermal vent deposits, we examined the archaeal and bacterial communities of 12 samples collected from two very different vent fields: the basalt-hosted Lucky Strike (37°17'N, 32°16.3'W, depth 1600-1750m) and the ultramafic-hosted Rainbow (36°13'N, 33°54.1'W, depth 2270-2330m)...
Stratigraphy of the Younger Dryas Chronozone and paleoenvironmental implications: Central and Southern Great Plains
V.T. Holliday, D.J. Meltzer, R. Mandel
2011, Quaternary International (242) 520-533
The Great Plains of the United States was the setting for some of the earliest research in North America into patterns and changes in the character of late Pleistocene environments and their effects on contemporary human populations. Many localities in the region have well-stratified records of terminal Pleistocene and early...
Application of the CO2-PENS risk analysis tool to the Rock Springs Uplift, Wyoming
P.H. Stauffer, R.J. Pawar, R.C. Surdam, Z. Jiao, H. Deng, B.C. Lettelier, H.S. Viswanathan, D.L. Sanzo, G. N. Keating
2011, Energy Procedia (4) 4084-4091
We describe preliminary application of the CO2-PENS performance and risk analysis tool to a planned geologic CO2 sequestration demonstration project in the Rock Springs Uplift (RSU), located in south western Wyoming. We use data from the RSU to populate CO2-PENS, an evolving system-level modeling tool developed at Los Alamos National Laboratory....
Mars Global Digital Dune Database (MGD3): North polar region (MC-1) distribution, applications, and volume estimates
R.K. Hayward
2011, Earth Surface Processes and Landforms (36) 1967-1972
The Mars Global Digital Dune Database (MGD3) now extends from 90°N to 65°S. The recently released north polar portion (MC‐1) of MGD3 adds ~844 000 km2 of moderate‐ to large‐size dark dunes to the previously released equatorial portion (MC‐2 to MC‐29) of the database. The database, available in GIS‐ and...
Implementation and modification of a three-dimensional radiation stress formulation for surf zone and rip-current applications
N. Kumar, G. Voulgaris, John C. Warner
2011, Coastal Engineering (58) 1097-1117
Regional Ocean Modeling System (ROMS v 3.0), a three-dimensional numerical ocean model, was previously enhanced for shallow water applications by including wave-induced radiation stress forcing provided through coupling to wave propagation models (SWAN, REF/DIF). This enhancement made it suitable for surf zone applications as demonstrated using examples of obliquely incident...
Real-time monitoring of CO2 storage sites: Application to Illinois Basin-Decatur Project
G. Picard, T. Berard, E. Chabora, S. Marsteller, S. Greenberg, R.J. Finley, U. Rinck, R. Greenaway, C. Champagnon, J. Davard
2011, Energy Procedia (4) 5594-5598
Optimization of carbon dioxide (CO2) storage operations for efficiency and safety requires use of monitoring techniques and implementation of control protocols. The monitoring techniques consist of permanent sensors and tools deployed for measurement campaigns. Large amounts of data are thus generated. These data must be managed and integrated for interpretation...
Recent storm and tsunami coarse-clast deposit characteristics, southeast Hawai'i
B. M. Richmond, Sebastian Watt, M. Buckley, B. E. Jaffe, G. Gelfenbaum, R.A. Morton
2011, Marine Geology (283) 79-89
Deposits formed by extreme waves can be useful in elucidating the type and characteristics of the depositional event. The study area on the southeast coast of the island of Hawaiʻi is characterized by the presence of geologically young basalts of known age that are mantled by recent wave-derived sedimentary deposits....
College and university environmental programs as a policy problem (Part 1): Integrating Knowledge, education, and action for a better world?
S.G. Clark, M.B. Rutherford, M.R. Auer, D.N. Cherney, R.L. Wallace, David J. Mattson, D. A. Clark, L. Foote, N. Krogman, P. Wilshusen, T. Steelman
2011, Environmental Management (47) 701-715
The environmental sciences/studies movement, with more than 1000 programs at colleges and universities in the United States and Canada, is unified by a common interest—ameliorating environmental problems through empirical enquiry and analytic judgment. Unfortunately, environmental programs have struggled in their efforts to integrate knowledge across disciplines and educate students to...
Specifying initial stress for dynamic heterogeneous earthquake source models
D.J. Andrews, M. Barall
2011, Bulletin of the Seismological Society of America (101) 2408-2417
Dynamic rupture calculations using heterogeneous stress drop that is random and self-similar with a power-law spatial spectrum have great promise of producing realistic ground-motion predictions. We present procedures to specify initial stress for random events with a target rupture length and target magnitude. The stress function is modified in the...
