Response of non-native lake trout (Salvelinus namaycush) to 15 years of harvest in Yellowstone Lake, Yellowstone National Park
J.M. Syslo, C.S. Guy, P.E. Bigelow, P.D. Doepke, B.D. Ertel, T.M. Koel
2011, Canadian Journal of Fisheries and Aquatic Sciences (68) 2132-2145
Introduced lake trout (Salvelinus namaycush) threaten to extirpate native Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) in the 34 000 ha Yellowstone Lake in Yellowstone National Park, USA. Suppression (and eventual eradication) of the lake trout population is deemed necessary for the conservation of Yellowstone cutthroat trout. A US National Park...
Field tracer investigation of unsaturated zone flow paths and mechanisms in agricultural soils of northwestern Mississippi, USA
K. S. Perkins, J. R. Nimmo, C.E. Rose, R.H. Coupe
2011, Journal of Hydrology (396) 1-11
In many farmed areas, intensive application of agricultural chemicals and withdrawal of groundwater for irrigation have led to water quality and supply issues. Unsaturated-zone processes, including preferential flow, play a major role in these effects but are not well understood. In the Bogue Phalia basin, an intensely agricultural area in...
Vegetation index-based crop coefficients to estimate evapotranspiration by remote sensing in agricultural and natural ecosystems
E. P. Glenn, C. M. U. Neale, D.J. Hunsaker, P.L. Nagler
2011, Hydrological Processes (25) 4050-4062
Crop coefficients were developed to determine crop water needs based on the evapotranspiration (ET) of a reference crop under a given set of meteorological conditions. Starting in the 1980s, crop coefficients developed through lysimeter studies or set by expert opinion began to be supplemented by remotely sensed vegetation indices (VI)...
Seasonal movements and environmental triggers to fall migration of Sage Sparrows
K.A. Fesenmyer, S.T. Knick
2011, Wilson Journal of Ornithology (123) 803-807
Post-breeding ecology of shrubland passerines prior to onset of migration is unknown relative to dynamics of breeding areas. We radiomarked and monitored 38 Sage Sparrows (Amphispiza belli ssp. nevadensis) at one site in Oregon and two in Nevada from September to mid-November 2007 to track local movements, estimate seasonal range...
The geochemistry and petrogenesis of the Paleoproterozoic Green Mountain arc: A composite(?), bimodal, oceanic, fringing arc
D.S. Jones, C. G. Barnes, Wayne R. Premo, A.W. Snoke
2011, Precambrian Research (185) 231-249
The inferred subduction affinity of the ∼1780-Ma Green Mountain arc, a dominantly bimodal igneous terrane (together with immature marine and volcaniclastic sedimentary rocks) accreted to the southern margin of the Wyoming province, is integral to arc-accretion models of the Paleoproterozoic growth of southern Laurentia. Conversely, the dominantly bimodal nature...
Polar bear population status in the northern Beaufort Sea, Canada, 1971-2006
I. Stirling, T. L. McDonald, E.S. Richardson, E.V. Regehr, Steven C. Amstrup
2011, Ecological Applications (21) 859-876
Polar bears (Ursus maritimus) of the northern Beaufort Sea (NB) population occur on the perimeter of the polar basin adjacent to the northwestern islands of the Canadian Arctic Archipelago. Sea ice converges on the islands through most of the year. We used open-population capture–recapture models to estimate population size...
Science, conservation, and camera traps
James D. Nichols, K. Ullas Karanth, Allan F. O’Connel
Allan F. O’Connell, James D. Nichols, K. Ullas Karanth, editor(s)
2011, Book chapter, Camera traps in animal ecology: Methods and analyses
Biologists commonly perceive camera traps as a new tool that enables them to enter the hitherto secret world of wild animals. Camera traps are being used in a wide range of studies dealing with animal ecology, behavior, and conservation. Our intention in this volume is not to simply present the...
Estimating tiger abundance from camera trap data: Field surveys and analytical issues
K. Ullas Karanth, James D. Nichols
Allan F. O’Connell, James D. Nichols, K. Ullas Karanth, editor(s)
2011, Book chapter, Camera traps in animal ecology
Automated photography of tigers Panthera tigris for purely illustrative purposes was pioneered by British forester Fred Champion (1927, 1933) in India in the early part of the Twentieth Century. However, it was McDougal (1977) in Nepal who first used camera traps, equipped with single-lens reflex cameras activated by pressure pads,...
History of plains resurfacing in the Scandia region of Mars
Kenneth L. Tanaka, Corey M. Fortezzo, Rosalyn K. Hayward, J. Alexis P. Rodriguez, James A. Skinner
2011, Planetary and Space Science (59) 1128-1142
We present a preliminary photogeologic map of the Scandia region of Mars with the objective of reconstructing its resurfacing history. The Scandia region includes the lower section of the regional lowland slope of Vastitas Borealis extending about 500–1800 km away from Alba Mons into the Scandia sub-basin below −4800 m...
Tracking solutes and water from subsurface drip irrigation application of coalbed methane-produced waters, Powder River Basin, Wyoming
Mark A. Engle, Carleton R. Bern, Richard W. Healy, J.I. Sams, J.W. Zupancic, K.T. Schroeder
2011, Environmental Geosciences (18) 169-187
One method to beneficially use water produced from coalbed methane (CBM) extraction is subsurface drip irrigation (SDI) of croplands. In SDI systems, treated CBM water (injectate) is supplied to the soil at depth, with the purpose of preventing the buildup of detrimental salts near the surface. The technology is...
Sexual difference in mercury concentrations of lake trout (Salvelinus namaycush) from Lake Ontario
C.P. Madenjian, M.J. Keir, D.M. Whittle
2011, Chemosphere (83) 903-908
We determined total mercury (Hg) concentrations in 50 female lake trout (Salvelinus namaycush) and 69 male lake trout from Lake Ontario (Ontario, Canada and New York, United States). Results showed that, on average, males were 8% higher in Hg concentration than females in Lake Ontario. We also used bioenergetics modeling...
Modeling hot spring chemistries with applications to martian silica formation
G.M. Marion, D.C. Catling, J.K. Crowley, J.S. Kargel
2011, Icarus (212) 629-642
Many recent studies have implicated hydrothermal systems as the origin of martian minerals across a wide range of martian sites. Particular support for hydrothermal systems include silica (SiO2) deposits, in some cases >90% silica, in the Gusev Crater region, especially in the Columbia Hills and at Home Plate. We have developed a model...
An ecosystem-scale model for the spread of a host-specific forest pathogen in the Greater Yellowstone Ecosystem
J.A. Hatala, M.C. Dietze, R.L. Crabtree, Katherine C. Kendall, D. Six, P.R. Moorcroft
2011, Ecological Applications (21) 1138-1153
The introduction of nonnative pathogens is altering the scale, magnitude, and persistence of forest disturbance regimes in the western United States. In the high-altitude whitebark pine (Pinus albicaulis) forests of the Greater Yellowstone Ecosystem (GYE), white pine blister rust (Cronartium ribicola) is an introduced fungal pathogen that is...
Could residual oil from the Exxon Valdez spill create a long-term population "sink" for sea otters in Alaska?
Daniel H. Monson, Daniel F. Doak, Brenda E. Ballachey, James L. Bodkin
2011, Ecological Applications (21) 2917-2932
Over 20 years ago, the Exxon Valdez oil tanker spilled 42 million L of crude oil into the waters of Prince William Sound, Alaska, USA. At the time of the spill, the sea otter (Enhydra lutris) population inhabiting the spill area suffered substantial acute injuries and loss. Subsequent research has...
A simple graphical approach to quantitative monitoring of rangelands
C. Riginos, J. E. Herrick, S.R. Sundaresan, C. Farley, J. Belnap
2011, Rangelands (33) 6-13
The article reviews graphical interpretation of the four monitoring methods that can be used to generate a variety of indicators of rangeland ecosystem function. Data for all four of the monitoring methods can be recorded on a single data sheet that is designed to be usable by somebody with minimal...
Watershed-scale response to climate change through the twenty-first century for selected basins across the United States
Lauren E. Hay, Steven L. Markstrom, Christian D. Ward-Garrison
2011, Earth Interactions (15) 1-37
The hydrologic response of different climate-change emission scenarios for the twenty-first century were evaluated in 14 basins from different hydroclimatic regions across the United States using the Precipitation-Runoff Modeling System (PRMS), a process-based, distributed-parameter watershed model. This study involves four major steps: 1) setup and calibration of the PRMS model...
Population structure and genetic diversity of greater sage-grouse (Centrocercus urophasianus) in fragmented landscapes at the northern edge of their range
K.L. Bush, C.K. Dyte, B.J. Moynahan, Cameron L. Aldridge, H.S. Sauls, A.M. Battazzo, B.L. Walker, K.E. Doherty, J. Tack, J. Carlson, D. Eslinger, J. Nicholson, M.S. Boyce, D.E. Naugle, C.A. Paszkowski, D.W. Coltman
2011, Conservation Genetics (12) 527-542
Range-edge dynamics and anthropogenic fragmentation are expected to impact patterns of genetic diversity, and understanding the influence of both factors is important for effective conservation of threatened wildlife species. To examine these factors, we sampled greater sage-grouse (Centrocercus urophasianus) from a declining, fragmented region at the northern periphery of the...
The Mairan domes: silicic volcanic constructs on the Moon
Timothy D. Glotch, Justin Hagerty, Paul G. Lucey, B. Ray Hawke, Thomas A. Giguere, Jessica A. Arnold, Jean-Pierre Williams, Bradley L. Jolliff, David A. Paige
2011, Geophysical Research Letters (38)
The Mairan domes are four features located in northern Oceanus Procellarum at ∼312.3E, 41.4N on the Moon. High resolution visible imagery, visible-to-mid-IR spectra, and Lunar Prospector Th abundance data all indicate that these four domes have a composition that is consistent with derivation from a Si-rich, highly evolved magma....
Paleoenvironmental implications of taxonomic variation among δ15N values of chloropigments
Meytal B. Higgins, Felisa Wolfe-Simon, Rebecca S. Robinson, Yelun Qin, Mark A. Saito, Ann Pearson
2011, Geochimica et Cosmochimica Acta (75) 7351-7363
Natural variations in the ratios of nitrogen isotopes in biomass reflect variations in nutrient sources utilized for growth. In order to use δ15N values of chloropigments of photosynthetic organisms to determine the corresponding δ15N values of biomass – and by extension, surface waters – the isotopic offset between chlorophyll and...
Characterizing near-surface CO2 conditions before injection - Perspectives from a CCS project in the Illinois Basin, USA
R.A. Locke II, I.G. Krapac, J.L. Lewicki, E. Curtis-Robinson
2011, Conference Paper, Energy Procedia
The Midwest Geological Sequestration Consortium is conducting a large-scale carbon capture and storage (CCS) project in Decatur, Illinois, USA to demonstrate the ability of a deep saline formation to store one million tonnes of carbon dioxide (CO2) from an ethanol facility. Beginning in early 2011, CO2 will be injected at...
Estimation of demographic parameters in a tiger population from long-term camera trap data
K. Ullas Karanth, James D. Nichols
Allan F. O’Connell, James D. Nichols, K. Ullas Karanth, editor(s)
2011, Book chapter, Camera traps in animal ecology
Chapter 7 (Karanth et al.) illustrated the use of camera trapping in combination with closed population capture–recapture (CR) models to estimate densities of tigers Panthera tigris. Such estimates can be very useful for investigating variation across space for a particular species (e.g., Karanth et al. 2004) or variation among species...
Walleye and sauger habitat
Michael A. Bozek, Timothy J. Haxton, Joshua K. Raabe
Bruce A. Barton, editor(s)
2011, Book chapter, Biology, management, and culture of walleye and sauger
No abstract available....
Columbus crater and other possible groundwater-fed paleolakes of Terra Sirenum, Mars
J.J. Wray, R.E. Milliken, Colin M. Dundas, Gregg A. Swayze, J. C. Andrews-Hanna, A.M. Baldridge, M. Chojnacki, J.L. Bishop, B.L. Ehlmann, S.L. Murchie, Roger N. Clark, F.P. Seelos, L.L. Tornabene, S. W. Squyres
2011, Journal of Geophysical Research E: Planets (116)
Columbus crater in the Terra Sirenum region of the Martian southern highlands contains light‐toned layered deposits with interbedded sulfate and phyllosilicate minerals, a rare occurrence on Mars. Here we investigate in detail the morphology, thermophysical properties, mineralogy, and stratigraphy of these deposits; explore their regional context; and interpret the crater's...
Threshold responses of songbirds to long-term timber management on an active industrial forest
Douglas A. Becker, Petra Bohall Wood, Patrick D. Keyser, T. Bently Wigley, Rachel Dellinger, Cathy A. Weakland
2011, Forest Ecology and Management (262) 449-460
Forest managers often seek to balance economic benefits from timber harvesting with maintenance of habitat for wildlife, ecosystem function, and human uses. Most research on the relationship between avian abundance and active timber management has been short-term, lasting one to two years, creating the need to investigate long-term avian responses...
Distribution of lake sturgeon in New York: 11 years of restoration management
Marc Chalupnicki, Dawn E. Dittman, D.M. Carlson
2011, American Midland Naturalist (165) 364-371
Lake sturgeon (Acipenser fulvescens) are native within the Lake Ontario drainage basin and listed as threatened by New York State. In 1995 the New York State Department of Environmental Conservation (NYSDEC) initiated restoration management of lake sturgeon. This management included both protection of extant populations and stocking of uninhabited...
