Competitive interactions between walleye (Sander vitreus) and smallmouth bass (Micropterus dolomieu) under various controlled conditions
M.R. Wuellner, B. D. S. Graeb, D.W. Willis, B.J. Galster, T.M. Selch, S. R. Chipps
2011, Journal of Freshwater Ecology (26) 299-314
The range of smallmouth bass (Micropterus dolomieu) is expanding northward, creating new interactions with native predators, including walleye (Sander vitreus). We used a series of experiments to investigate competition between walleye (WAE) and smallmouth bass (SMB) at different life stages and light conditions, identified behaviors that allowed one fish to...
Monitoring carnivore populations at the landscape scale: occupancy modelling of tigers from sign surveys
Kota Ullas Karanth, Arjun M. Gopalaswamy, Narayanarao Samba Kumar, Srinivas Vaidyanathan, James D. Nichols, Darryl I. MacKenzie
2011, Journal of Applied Ecology (48) 1048-1056
1. Assessing spatial distributions of threatened large carnivores at landscape scales poses formidable challenges because of their rarity and elusiveness. As a consequence of logistical constraints, investigators typically rely on sign surveys. Most survey methods, however, do not explicitly address the central problem of imperfect detections of animal signs in the...
Preening behavior of adult gyrfalcons tagged with backpack transmitters
T.L. Booms, P.F. Schempf, M.R. Fuller
2011, Journal of Raptor Research (45) 264-267
Radio transmitters provide data that enhance understanding of raptor biology (Walls and Kenward 2007) and are now used to answer a multitude of research questions (Meyburg and Fuller 2007). However, transmitters affect the birds that carry them (Barron et al. 2010), and it is important to document and evaluate such...
Regional contamination versus regional dietary differences: Understanding geographic variation in brominated and chlorinated contaminant levels in polar bears
M.A. McKinney, R. J. Letcher, Jon Aars, E.W. Born, Marsha Branigan, R. Dietz, T.J. Evans, Geir W. Gabrielsen, D.C.G. Muir, Elizabeth L. Peacock, C. Sonne
2011, Environmental Science & Technology (45) 896-902
The relative contribution of regional contamination versus dietary differences to geographic variation in polar bear (Ursus maritimus) contaminant levels is unknown. Dietary variation between Alaska, Canada, East Greenland, and Svalbard subpopulations was assessed by muscle nitrogen and carbon stable isotope (δ15N, δ13C) and adipose fatty acid (FA) signatures relative to...
Duration and severity of Medieval drought in the Lake Tahoe Basin
J.A. Kleppe, D.S. Brothers, G.M. Kent, F. Biondi, S. Jensen, N. W. Driscoll
2011, Quaternary Science Reviews (30) 3269-3279
Droughts in the western U.S. in the past 200 years are small compared to several megadroughts that occurred during Medieval times. We reconstruct duration and magnitude of extreme droughts in the northern Sierra Nevada from hydroclimatic conditions in Fallen Leaf Lake, California. Stands of submerged trees rooted in situ below...
Sea surface temperatures of the mid-Piacenzian Warm Period: A comparison of PRISM3 and HadCM3
Harry J. Dowsett, A.M. Haywood, P.J. Valdes, Marci M. Robinson, D.J. Lunt, D.J. Hill, D.K. Stoll, Kevin M. Foley
2011, Palaeogeography, Palaeoclimatology, Palaeoecology (309) 83-91
It is essential to document how well the current generation of climate models performs in simulating past climates to have confidence in their ability to project future conditions. We present the first global, in-depth comparison of Pliocene sea surface temperature (SST) estimates from a coupled ocean–atmosphere climate model experiment...
Episodic growth of a Late Cretaceous and Paleogene intrusive complex of pegmatitic leucogranite, Ruby Mountains core complex, Nevada, USA
Keith A. Howard, J. L. Wooden, C. G. Barnes, W. R. Premo, A.W. Snoke, S.-Y. Lee
2011, Geosphere (7) 1220-1248
Gneissic pegmatitic leucogranite forms a dominant component (>600 km3) of the midcrustal infrastructure of the Ruby Mountains–East Humboldt Range core complex (Nevada, USA), and was assembled and modified episodically into a batholithic volume by myriad small intrusions from ca. 92 to 29 Ma. This injection complex consists of deformed sheets...
Role of origin and release location in pre-spawning distribution and movements of anadromous alewife
Holly J. Frank, M. E. Mather, Joseph M. Smith, Robert M. Muth, John T. Finn
2011, Fisheries Management and Ecology (18) 12-24
Capturing adult anadromous fish that are ready to spawn from a self sustaining population and transferring them into a depleted system is a common fisheries enhancement tool. The behaviour of these transplanted fish, however, has not been fully evaluated. The movements of stocked and native anadromous alewife, Alosa pseudoharengus (Wilson),...
Geochemical analysis of Atlantic rim water, Carbon County, Wyoming: New applications for characterizing coalbed natural gas reservoirs
J.F. McLaughlin, C.D. Frost, Shruti Sharma
2011, American Association of Petroleum Geologists Bulletin (95) 191-217
Coalbed natural gas (CBNG) production typically requires the extraction of large volumes of water from target formations, thereby influencing any associated reservoir systems. We describe isotopic tracers that provide immediate data on the presence or absence of biogenic natural gas and the identify methane-containing reservoirs are hydrologically confined. Isotopes of...
Successful integration efforts in water quality from the integrated Ocean Observing System Regional Associations and the National Water Quality Monitoring Network
R. Ragsdale, E. Vowinkel, D. Porter, P. Hamilton, R. Morrison, J. Kohut, B. Connell, H. Kelsey, P. Trowbridge
2011, Marine Technology Society Journal (45) 19-28
The Integrated Ocean Observing System (IOOS®) Regional Associations and Interagency Partners hosted a water quality workshop in January 2010 to discuss issues of nutrient enrichment and dissolved oxygen depletion (hypoxia), harmful algal blooms (HABs), and beach water quality. In 2007, the National Water Quality Monitoring Council piloted demonstration projects as...
Seismic hazard and risk assessments for Beijing-Tianjin-Tangshan, China, area
F. Xie, Z. Wang, J. Liu
2011, Pure and Applied Geophysics (168) 731-738
Seismic hazard and risk in the Beijing–Tianjin–Tangshan, China, area were estimated from 500-year intensity observations. First, we digitized the intensity observations (maps) using ArcGIS with a cell size of 0.1 × 0.1°. Second, we performed a statistical analysis on the digitized intensity data, determined an average b value (0.39), and derived the intensity–frequency relationship...
Interannual variation of rare earth element abundances in corals from northern coast of the South China Sea and its relation with sea-level change and human activities
Yajing Liu, Z. Peng, G. Wei, T. Chen, W. Sun, J. He, Gaisheng Liu, C. L. Chou, C.-C. Shen
2011, Marine Environmental Research (71) 62-69
Here we present interannual rare earth element (REE) records spanning the last two decades of the 20th century in two living Porites corals, collected from Longwan Bay, close to the estuarine zones off Wanquan River of Hainan Island and Hong Kong off the Pearl River Delta of Guangdong Province in the northern...
Thermal erosion of a permafrost coastline: Improving process-based models using time-lapse photography
C. Wobus, R. Anderson, I. Overeem, N. Matell, G. Clow, F. Urban
2011, Arctic, Antarctic, and Alpine Research (43) 474-484
Coastal erosion rates locally exceeding 30 m y-1 have been documented along Alaska's Beaufort Sea coastline, and a number of studies suggest that these erosion rates have accelerated as a result of climate change. However, a lack of direct observational evidence has limited our progress in quantifying the specific processes...
Atomic weights of the elements 2009 (IUPAC technical report)
M.E. Wieser, Tyler B. Coplen
2011, Pure and Applied Chemistry (83) 359-396
The biennial review of atomic-weight determinations and other cognate data has resulted in changes for the standard atomic weights of 11 elements. Many atomic weights are not constants of nature, but depend upon the physical, chemical, and nuclear history of the material. The standard atomic weights of 10 elements having...
An analytical framework to assist decision makers in the use of forest ecosystem model predictions
Guy R. Larocque, Jagtar S. Bhatti, J.C. Ascough, J. Liu, N. Luckai, D. Mailly, L. Archambault, Andrew M. Gordon
2011, Environmental Modelling and Software (26) 280-288
The predictions from most forest ecosystem models originate from deterministic simulations. However, few evaluation exercises for model outputs are performed by either model developers or users. This issue has important consequences for decision makers using these models to develop natural resource management policies, as they cannot evaluate the extent to...
The secret to successful solute-transport modeling
Leonard F. Konikow
2011, Ground Water (49) 144-159
Modeling subsurface solute transport is difficult—more so than modeling heads and flows. The classical governing equation does not always adequately represent what we see at the field scale. In such cases, commonly used numerical models are solving the wrong equation. Also, the transport equation is hyperbolic where advection is dominant,...
New aerial survey and hierarchical model to estimate manatee abundance
Catherine A. Langtimm, Robert Dorazio, B.M. Stith, T.J. Doyle
2011, Journal of Wildlife Management (75) 399-412
Monitoring the response of endangered and protected species to hydrological restoration is a major component of the adaptive management framework of the Comprehensive Everglades Restoration Plan. The endangered Florida manatee (Trichechus manatus latirostris) lives at the marine-freshwater interface in southwest Florida and is likely to be affected by hydrologic restoration....
An observation of a partially albinistic zenaida macroura (Mourning Dove)
James Berdeen, David L. Otis
2011, Southeastern Naturalist (10) 185-188
Abstract Three of the 4 forms of albinism that occur in avifauna have been detected in Zenaida macroura (Mourning Dove). Albinism is rare in this species, and the incidence rate of each age and sex cohort is not well known. Consequently, we examined the pigmentation of Mourning Doves encountered in...
Compensatory effects of recruitment and survival when amphibian populations are perturbed by disease
E. Muths, R. D. Scherer, D. S. Pilliod
2011, Journal of Applied Ecology (48) 873-879
The need to increase our understanding of factors that regulate animal population dynamics has been catalysed by recent, observed declines in wildlife populations worldwide. Reliable estimates of demographic parameters are critical for addressing basic and applied ecological questions and understanding the response of parameters to perturbations (e.g. disease, habitat loss,...
Mapping the Philippines' mangrove forests using Landsat imagery
Jordan Long, Chandra Giri
2011, Sensors (11) 2972-2981
Current, accurate, and reliable information on the areal extent and spatial distribution of mangrove forests in the Philippines is limited. Previous estimates of mangrove extent do not illustrate the spatial distribution for the entire country. This study, part of a global assessment of mangrove dynamics, mapped the spatial distribution and...
Potential misuse of avian density as a conservation metric
Susan K. Skagen, Amy A. Yackel Adams
2011, Conservation Biology (25) 48-55
: Effective conservation metrics are needed to evaluate the success of management in a rapidly changing world. Reproductive rates and densities of breeding birds (as a surrogate for reproductive rate) have been used to indicate the quality of avian breeding habitat, but the underlying assumptions of these metrics rarely have...
Diet composition and feeding patterns of adult shovelnose sturgeon (Scaphirhynchus platorynchus) in the lower Platte River, Nebraska, USA
T. Rapp, D. A. Shuman, B. D. S. Graeb, S. R. Chipps, E. J. Peters
2011, Journal of Applied Ichthyology (27) 351-355
Two-hundred and seven adult shovelnose sturgeon ranging from 450 to 718 mm in length were sampled from June to October 2001 and May to July 2002 to determine diet composition and feeding patterns in the lower Platte River. Shovelnose sturgeon fed primarily upon aquatic insect larvae and nymphs (>99% composition by...
Molecular characterization and comparison of shale oils generated by different pyrolysis methods using FT-ICR mass spectrometry
J.M. Jin, S. Kim, J.E. Birdwell
2011, Conference Paper, ACS National Meeting Book of Abstracts
Fourier transform ion cyclotron resonance mass spectrometry (FT ICR-MS) was applied in the analysis of shale oils generated using two different pyrolysis systems under laboratory conditions meant to simulate surface and in situ oil shale retorting. Significant variations were observed in the shale oils, particularly the degree of conjugation of...
Agricultural practices and residual corn during spring crane and waterfowl migration in Nebraska
Mark H. Sherfy, Michael J. Anteau, A.A. Bishop
2011, Journal of Wildlife Management (75) 995-1003
Nebraska's Central Platte River Valley (CPRV) is a major spring‐staging area for migratory birds. Over 6 million ducks, geese, and sandhill cranes (Grus canadensis) stage there en route to tundra, boreal forest, and prairie breeding habitats, storing nutrients for migration and reproduction by consuming primarily corn remaining in fields after...
Increased fitness of rice plants to abiotic stress via habitat adapted symbiosis: A strategy for mitigating impacts of climate change
R. S. Redman, Y.-O. Kim, C.J.D.A. Woodward, C. Greer, L. Espino, S.L. Doty, R. J. Rodriguez
2011, PLoS ONE (6)
Climate change and catastrophic events have contributed to rice shortages in several regions due to decreased water availability and soil salinization. Although not adapted to salt or drought stress, two commercial rice varieties achieved tolerance to these stresses by colonizing them with Class 2 fungal endophytes isolated from plants growing...
