Bounding species distribution models
Thomas J. Stohlgren, Catherine S. Jarnevich, Wayne E. Esaias, Jeffery T. Morisette
2011, Current Zoology (57) 642-647
Species distribution models are increasing in popularity for mapping suitable habitat for species of management concern. Many investigators now recognize that extrapolations of these models with geographic information systems (GIS) might be sensitive to the environmental bounds of the data used in their development, yet there is no recommended best...
Transitions of interaction outcomes in a uni-directional consumer-resource system
Y. Wang, Donald L. DeAngelis
2011, Journal of Theoretical Biology (280) 43-49
A uni-directional consumer–resource system of two species is analyzed. Our aim is to understand the mechanisms that determine how the interaction outcomes depend on the context of the interaction; that is, on the model parameters. The dynamic behavior of the model is described and, in particular, it is demonstrated that no periodic...
Causes of systematic over- or underestimation of low streamflows by use of index-streamgage approaches in the United States
K. Eng, J.E. Kiang, Y.-Y. Chen, D.M. Carlisle, G.E. Granato
2011, Hydrological Processes (25) 2211-2220
Low-flow characteristics can be estimated by multiple linear regressions or the index-streamgage approach. The latter transfers streamflow information from a hydrologically similar, continuously gaged basin ('index streamgage') to one with a very limited streamflow record, but often results in biased estimates. The application of the index-streamgage approach can be generalized...
Formulation of a correlated variables methodology for assessment of continuous gas resources with an application to the Woodford play, Arkoma Basin, eastern Oklahoma
Ricardo A. Olea, D.W. Houseknecht, C.P. Garrity, T. A. Cook
2011, Boletin Geologico y Minero (122) 483-496
Shale gas is a form of continuous unconventional hydrocarbon accumulation whose resource estimation is unfeasible through the inference of pore volume. Under these circumstances, the usual approach is to base the assessment on well productivity through estimated ultimate recovery (EUR). Unconventional resource assessments that consider uncertainty are typically done by...
Patterns of coral disease across the Hawaiian Archipelago: Relating disease to environment
G.S. Aeby, G.J. Williams, E.C. Franklin, J. Kenyon, E.F. Cox, S. Coles, Thierry M. Work
2011, PLoS ONE (6)
In Hawaii, coral reefs occur across a gradient of biological (host abundance), climatic (sea surface temperature anomalies) and anthropogenic conditions from the human-impacted reefs of the main Hawaiian Islands (MHI) to the pristine reefs of the northwestern Hawaiian Islands (NWHI). Coral disease surveys were conducted at 142 sites from across...
Revisiting the Earth's sea-level and energy budgets from 1961 to 2008
John A. Church, Neil J. White, Leonard F. Konikow, Catia M. Domingues, J. Graham Cogley, Eric Rignot, Jonathan M. Gregory, Michiel R. van den Broeke, Andrew J. Monaghan, Isabella Velicogna
2011, Geophysical Research Letters (38)
We review the sea-level and energy budgets together from 1961, using recent and updated estimates of all terms. From 1972 to 2008, the observed sea-level rise (1.8 0.2 mm yr-1 from tide gauges alone and 2.1 0.2 mm yr -1 from a combination of tide gauges and altimeter observations) agrees...
Are there pre-Quaternary geological analogues for a future greenhouse warming?
A.M. Haywood, A. Ridgwell, D.J. Lunt, D.J. Hill, M.J. Pound, H.J. Dowsett, A.M. Dolan, J.E. Francis, Murray Williams
2011, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (369) 933-956
Given the inherent uncertainties in predicting how climate and environments will respond to anthropogenic emissions of greenhouse gases, it would be beneficial to society if science could identify geological analogues to the human race’s current grand climate experiment. This has been a focus of the geological and palaeoclimate communities over the...
Variations in eruption style during the 1931A.D. eruption of Aniakchak volcano, Alaska
R.S. Nicholson, J.E. Gardner, C.A. Neal
2011, Journal of Volcanology and Geothermal Research (207) 69-82
The 1931 A.D. eruption of Aniakchak volcano, Alaska, progressed from subplinian to effusive eruptive style and from trachydacite to basaltic andesite composition from multiple vent locations. Eyewitness accounts and new studies of deposit stratigraphy provide a combined narrative of eruptive events. Additional field, compositional, grain size, componentry, density, and grain morphology...
Triggered creep as a possible mechanism for delayed dynamic triggering of tremor and earthquakes
David R. Shelly, Zhigang Peng, David P. Hill, Chastity Aiken
2011, Nature Geoscience (4) 384-388
The passage of radiating seismic waves generates transient stresses in the Earth’s crust that can trigger slip on faults far away from the original earthquake source. The triggered fault slip is detectable in the form of earthquakes and seismic tremor<a id="ref-link-section-d69550e363" title="Guilhem, A., Peng, Z. & Nadeau, R. M. High-frequency identification...
Inverse modeling with RZWQM2 to predict water quality
Bernard T. Nolan, Robert W. Malone, Liwang Ma, Christopher T. Green, Michael N. Fienen, Dan B. Jaynes
2011, Book chapter, Methods of introducing system models into agricultural research
This chapter presents guidelines for autocalibration of the Root Zone Water Quality Model (RZWQM2) by inverse modeling using PEST parameter estimation software (Doherty, 2010). Two sites with diverse climate and management were considered for simulation of N losses by leaching and in drain flow: an almond...
High-resolution well-log derived dielectric properties of gas-hydrate-bearing sediments, Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope
Y. Sun, D. Goldberg, Timothy S. Collett, R. Hunter
2011, Marine and Petroleum Geology (28) 450-459
A dielectric logging tool, electromagnetic propagation tool (EPT), was deployed in 2007 in the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well (Mount Elbert Well), North Slope, Alaska. The measured dielectric properties in the Mount Elbert well, combined with density log measurements, result in a vertical high-resolution (cm-scale) estimate...
Fire management of Mediterranean landscapes
Jon E. Keeley, William J. Bond, Ross A. Bradstock, Juli G. Pausas, Philip W. Rundel
2011, Book chapter, Fire in Mediterranean ecosystems: Ecology, evolution and management
The hazardous mediterranean climate, highly flammable vegetation, and rugged terrain, all important elements of fire behavior, become problems only in the presence of people. People recreate and build homes in the mediterranean wildlands because of the delightful climate and will continue to do so as long as space is...
Comparisons of watershed sulfur budgets in southeast Canada and northeast US: New approaches and implications
Myron J. Mitchell, Gary Lovett, Scott Bailey, Fred Beall, Doug Burns, Don Buso, Thomas A. Clair, Francois Courchesne, Louis Duchesne, Cathy Eimers, Ivan Fernandez, Daniel Houle, Dean S. Jeffries, Gene E. Likens, Michael D. Moran, Christopher Rogers, Donna Schwede, Jamie Shanley, Kathleen C. Weathers, Robert Vet
2011, Biogeochemistry (103) 181-207
Most of eastern North America receives elevated levels of atmospheric deposition of sulfur (S) that result from anthropogenic SO2 emissions from fossil fuel combustion. Atmospheric S deposition has acidified sensitive terrestrial and aquatic ecosystems in this region; however, deposition has been declining since the 1970s, resulting in some recovery in previously...
Boiga Irregularis (Brown Treesnake)
E. Wostl, T.J. Hinkle, Bjorn Lardner, Robert N. Reed
2011, Herpetological Review (42) 282-282
No abstract available....
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...
Assessing the role of conspecific attraction in habitat restoration for Henslow's sparrows in Iowa
Jennifer A. Vogel, Rolf R. Koford, David L. Otis
2011, Prairie Naturalist (43) 23-28
The presence of conspecific individuals may provide important cues about habitat quality for territorial songbirds. We tested the ability of a conspecific song playback system to attract Henslow’s sparrows to previously unoccupied restored habitat. We successfully attracted Heslow’s sparrows to 3 of 7 treatment plots using conspecific song playbacks and...
Genetic analysis of scats reveals minimum number and sex of recently documented mountain lions
Ashwin Naidu, Lindsay A. Smythe, Ron W. Thompson, Melanie Culver
2011, Journal of Fish and Wildlife Management (2) 106-111
Recent records of mountain lions Puma concolor and concurrent declines in desert bighorn sheep Ovis canadensis mexicana on Kofa National Wildlife Refuge in Arizona, United States, have prompted investigations to estimate the number of mountain lions occurring there. We performed noninvasive genetic analyses and identified species, individuals, and sex from...
Character of shell beds flanking Herod Point Shoal, southeastern Long Island Sound, New York
Lawrence J. Poppe, S. Jeffress Williams, Ivar G. Babb
2011, Journal of Coastal Research (27) 493-501
High biogenic productivity, strong tidal currents, shoal topography, and short transport distances combine to favor shell-bed formation along the lower flanks of a cape-associated shoal off Herod Point on Long Island, New York. This shell bed has a densely packed, clast-supported fabric composed largely of undegraded surf clam (Spisula solidissima)...
Midcontinent microcosm: Geology of the Atkins lake - Marengo falls area (Field trip 2)
Marcia Bjornerud, William F. Cannon
2011, Conference Paper, Institute on Lake Superior Geology, Proceedings Volume 57, Part 2: Field Trip Guidebook
Archean and Proterozoic rocks exposed over about 16km2 between Atkins Lake and Coffee Lake in southeastern Bayfield County (Fig. 1) chronicle almost all of the major Precambrian geologic events in the history of the southern Superior Craton. The oldest rocks are part of a locally gneissic quartz monzonite complex, the...
Factors affecting winter survival of female mallards in the lower Mississippi alluvial valley
B.E. Davis, A. D. Afton, R. R. Cox Jr.
2011, Waterbirds (34) 186-194
The lower Mississippi Alluvial Valley (hereafter LMAV) provides winter habitat for approximately 40% of the Mississippi Flyway's Mallard (Anas platyrhynhcos) population; information on winter survival rates of female Mallards in the LMAV is restricted to data collected prior to implementation of the North American Waterfowl Management Plan. To estimate recent...
Reply to "Comment on 'A model of earthquake triggering probabilities and application to dynamic deformations constrained by ground motion observations' by Ross Stein"
J. Gomberg, K. Felzer
2011, Journal of Geophysical Research B: Solid Earth (116)
PP and PS interferometric images of near-seafloor sediments
S.S. Haines
2011, SEG Technical Program Expanded Abstracts (30) 1288-1292
I present interferometric processing examples from an ocean-bottom cable OBC dataset collected at a water depth of 800 m in the Gulf of Mexico. Virtual source and receiver gathers created through cross-correlation of full wavefields show clear PP reflections and PS conversions from near-seafloor layers of interest. Virtual gathers from...
Using multi-source satellite data for lake level modelling in ungauged basins: A case study for Lake Turkana, East Africa
N.M. Velpuri, G.B. Senay, K.O. Asante
2011, Hydrology and Earth System Sciences Discussions (8) 4851-4890
Managing limited surface water resources is a great challenge in areas where ground-based data are either limited or unavailable. Direct or indirect measurements of surface water resources through remote sensing offer several advantages of monitoring in ungauged basins. A physical based hydrologic technique to monitor lake water levels in ungauged...
Improving our legacy: Incorporation of adaptive management into state wildlife action plans
J.J. Fontaine
2011, Journal of Environmental Management (92) 1403-1408
The loss of biodiversity is a mounting concern, but despite numerous attempts there are few large scale conservation efforts that have proven successful in reversing current declines. Given the challenge of biodiversity conservation, there is a need to develop strategic conservation plans that address species declines even with the inherent...
Implications of chronic wasting disease, cougar predation, and reduced recruitment for elk management
G.A. Sargeant, D.C. Weber, D.E. Roddy
2011, Journal of Wildlife Management (75) 171-177
Emerging diseases and expanding carnivore populations may have profound implications for ungulate harvest management and population regulation. To better understand effects of chronic wasting disease (CWD) and cougar (Puma concolor) predation, we studied mortality and recruitment of elk (Cervus elaphus) at Wind Cave National Park (WICA) during 2005-2009. We marked...
