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...
Predicting community responses to perturbations in the face of imperfect knowledge and network complexity
M. Novak, J.T. Wootton, D.F. Doak, M. Emmerson, J. A. Estes, M. T. Tinker
2011, Ecology (92) 836-846
How best to predict the effects of perturbations to ecological communities has been a long-standing goal for both applied and basic ecology. This quest has recently been revived by new empirical data, new analysis methods, and increased computing speed, with the promise that ecologically important insights may be obtainable from...
Nest predation and circulating corticosterone levels within and among species
J.J. Fontaine, E. Arriero, H. Schwabl, T. E. Martin
2011, Conference Paper, Condor
Variation in the risk of predation to offspring can influence the expression of reproductive strategies both within and among species. Appropriate expression of reproductive strategies in environments that differ in predation risk can have clear advantages for fitness. Although adult-predation risk appears to influence glucocorticosteroid levels, leading to changes in...
Process-based, morphodynamic hindcast of decadal deposition patterns in San Pablo Bay, California, 1856-1887
M. van der Wegen, B. E. Jaffe, J.A. Roelvink
2011, Journal of Geophysical Research F: Earth Surface (116)
This study investigates the possibility of hindcasting-observed decadal-scale morphologic change in San Pablo Bay, a subembayment of the San Francisco Estuary, California, USA, by means of a 3-D numerical model (Delft3D). The hindcast period, 1856-1887, is characterized by upstream hydraulic mining that resulted in a high sediment input to the...
A data-driven approach for modeling post-fire debris-flow volumes and their uncertainty
Michael J. Friedel
2011, Environmental Modelling and Software (26) 1583-1598
This study demonstrates the novel application of genetic programming to evolve nonlinear post-fire debris-flow volume equations from variables associated with a data-driven conceptual model of the western United States. The search space is constrained using a multi-component objective function that simultaneously minimizes root-mean squared and unit errors for the evolution...
Interhemispheric ice-sheet synchronicity during the last glacial maximum
M.E. Weber, P.U. Clark, W. Ricken, J.X. Mitrovica, S. W. Hostetler, G. Kuhn
2011, Science (334) 1265-1269
The timing of the last maximum extent of the Antarctic ice sheets relative to those in the Northern Hemisphere remains poorly understood. We develop a chronology for the Weddell Sea sector of the East Antarctic Ice Sheet that, combined with ages from other Antarctic ice-sheet sectors, indicates that the advance...
Porphyry Cu indicator minerals in till as an exploration tool: Example from the giant Pebble porphyry Cu-Au-Mo deposit, Alaska, USA
Karen D. Kelley, Robert G. Eppinger, J. Lang, Steven M. Smith, David L. Fey
2011, Geochemistry: Exploration, Environment, Analysis (11) 321-334
Porphyry Cu indicator minerals are mineral species in clastic sediments that indicate the presence of mineralization and hydrothermal alteration associated with porphyry Cu and associated skarn deposits. Porphyry Cu indicator minerals recovered from shallow till samples near the giant Pebble Cu-Au-Mo porphyry deposit in SW Alaska, USA, include apatite, andradite...
Ontogenetic and diel variation in stream habitat use by brook trout (Salvelinus fontinalis) in a headwater stream
J. H. Johnson, R. M. Ross, D. S. Dropkin, Lori A. Redell
2011, Journal of Freshwater Ecology (26) 143-152
Although considerable information exists on habitat use by stream salmonids, only a small portion has quantitatively examined diurnal and nocturnal habitat variation. We examined diel variation in habitat use by age-0 and age-1+ brook trout (Salvelinus fontinalis) during summer and autumn in a headwater stream in northern Pennsylvania. Habitat variables...
The importance of warm season warming to western U.S. streamflow changes
T. Das, D.W. Pierce, D.R. Cayan, J.A. Vano, D.P. Lettenmaier
2011, Geophysical Research Letters (38)
Warm season climate warming will be a key driver of annual streamflow changes in four major river basins of the western U.S., as shown by hydrological model simulations using fixed precipitation and idealized seasonal temperature changes based on climate projections with SRES A2 forcing. Warm season (April-September) warming reduces streamflow...
Associations between dioxins/furans and dioxin-like PCBs in estuarine sediment and blue crab
J. Liebens, C.J. Mohrherr, Natalie K. Karouna-Renier, R.A. Snyder, K.R. Rao
2011, Water, Air, & Soil Pollution (222) 403-419
The objective of the present study was to evaluate the relationships between the quantity, toxicity, and compositional profile of dioxin/furan compounds (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) in estuarine sediment and in the blue crab (Callinectes sapidus). Sediment and blue crab samples were collected in three small urban...
Woody invasions of urban trails and the changing face of urban forests in the great plains, USA
K.T. Nemec, Craig R. Allen, A. Alai, G. Clements, A.C. Kessler, T. Kinsell, A. Major, B.J. Stephen
2011, American Midland Naturalist (165) 241-256
Corridors such as roads and trails can facilitate invasions by non-native plant species. The open, disturbed habitat associated with corridors provides favorable growing conditions for many non-native plant species. Bike trails are a corridor system common to many urban areas that have not been studied for their potential role in...
Late Pleistocene dune activity in the central Great Plains, USA
J.A. Mason, J. B. Swinehart, P.R. Hanson, D.B. Loope, R.J. Goble, X. Miao, R.L. Schmeisser
2011, Quaternary Science Reviews (30) 3858-3870
Stabilized dunes of the central Great Plains, especially the megabarchans and large barchanoid ridges of the Nebraska Sand Hills, provide dramatic evidence of late Quaternary environmental change. Episodic Holocene dune activity in this region is now well-documented, but Late Pleistocene dune mobility has remained poorly documented, despite early interpretations of...
Bat mortality and activity at a Northern Iowa wind resource area
A.A. Jain, Rolf R. Koford, A.W. Hancock, G. G. Zenner
2011, American Midland Naturalist (165) 185-200
We examined bat collision mortality, activity and species composition at an 89-turbine wind resource area in farmland of north-central Iowa from mid-Apr. to mid-Dec., 2003 and mid-Mar. to mid-Dec., 2004. We found 30 bats beneath turbines on cleared ground and gravel access areas in 2003 and 45 bats in 2004....
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)...
Monitoring a large volume CO2 injection: Year two results from SECARB project at Denbury’s Cranfield, Mississippi, USA
Susan D. Hovorka, Timothy A. Meckel, Ramon H. Trevino, Jiemin Lu, Jean-Philippe Nicot, Jong-Won Choi, David Freeman, Paul Cook, Thomas M. Daley, Jonathan B. Ajo-Franklin, Barry M. Freifeild, Christine Doughty, Charles R. Carrigan, Doug La Brecque, Yousif K. Kharaka, James J. Thordsen, Tommy J. Phelps, Changbing Yang, Katherine D. Romanak, Tongwei Zhang, Robert M. Holt, Jeffery S. Lindler, Robert J. Butsch
2011, Energy Procedia (4) 3478-3485
The Southeast Regional Carbon Sequestration Partnership (SECARB) early project in western Mississippi has been testing monitoring tools and approaches to document storage efficiency and storage permanence under conditions of CO2 EOR as well as downdip injection into brine. Denbury Onshore LLC is host for the study and has brought a...
The rise and fall of Lake Bonneville between 45 and 10.5 ka
L. V. Benson, S.P. Lund, J. P. Smoot, D.E. Rhode, R. J. Spencer, K.L. Verosub, L.A. Louderback, C. A. Johnson, R. O. Rye, R.M. Negrini
2011, Quaternary International (235) 57-69
A sediment core taken from the western edge of the Bonneville Basin has provided high-resolution proxy records of relative lake-size change for the period 45.1–10.5 calendar ka (hereafter ka). Age control was provided by a paleomagnetic secular variation (PSV)-based age model for Blue Lake core BL04-4. Continuous records of δ18O...
EAARL coastal topography - Assateague Island National Seashore, Maryland and Virginia, 2010
J.M. Bonisteel-Cormier, Amar Nayegandhi, C. W. Wright, J. C. Brock, D.B. Nagle, Saisudha Vivekanandan, E.S. Klipp, Xan Fredericks, Sara Stevens
2011, Data Series 628
This DVD contains lidar-derived bare-earth (BE) and first-surface (FS) topography GIS datasets of a portion of the Assateague Island National Seashore in Maryland and Virginia. These datasets were acquired on March 19 and 24, 2010....
Genetic and environmental influences on leaf phenology and cold hardiness of native and introduced riparian trees
Jonathan M. Friedman, J. E. Roelle, B.S. Cade
2011, International Journal of Biometeorology (55) 775-787
To explore the roles of plasticity and genetic variation in the response to spatial and temporal climate variation, we established a common garden consisting of paired collections of native and introduced riparian trees sampled along a latitudinal gradient. The garden in Fort Collins, Colorado (latitude 40.6°N), included 681 native plains...
Recreation impacts to cliff resources in the Potomac Gorge: Final report, June 2011
Jeffrey L. Marion, C. Carr, C.A. Davis
2011, Report
Managers of the National Park Service (NPS) are directed by law to accommodate appropriate types and amounts of visitation while ensuring that: any adverse impacts are the minimum necessary, unavoidable, cannot be further mitigated, and do not constitute impairment or derogation of park resources and values. (NPS 2006). The increasing...
Distinguishing between stress-induced and structural anisotropy at Mount Ruapehu volcano, New Zealand
J. H. Johnson, M.K. Savage, J. Townend
2011, Journal of Geophysical Research B: Solid Earth (116)
We have created a benchmark of spatial variations in shear wave anisotropy around Mount Ruapehu, New Zealand, against which to measure future temporal changes. Anisotropy in the crust is often assumed to be caused by stress-aligned microcracks, and the polarization of the...
Short-term nitrogen additions can shift a coastal wetland from a sink to a source of N2O
Serena Moseman-Valtierra, Rosalinda Gonzalez, Kevin D. Kroeger, Jianwu Tang, Wei Chun Chao, John Crusius, John F. Bratton, Adrian G. Mann, James Shelton
2011, Atmospheric Environment (45) 4390-4397
Coastal salt marshes sequester carbon at high rates relative to other ecosystems and emit relatively little methane particularly compared to freshwater wetlands. However, fluxes of all major greenhouse gases (N2O, CH4, and CO2) need to be quantified for accurate assessment of the climatic roles of these ecosystems. Anthropogenic nitrogen inputs...
A review of the lignite resources of Arkansas
Paul C. Hackley, Jason C. Willett, Peter D. Warwick, S.J. Law, Douglas J. Nichols
Peter D. Warwick, Alexander K. Karlsen, Matthew D. Merrill, Brett J. Valentine, editor(s)
2011, Book chapter, Geologic assessment of coal in the Gulf of Mexico coastal plain: AAPG Studies in Geology vol. 62
This review of the lignite resources of Arkansas is a part of the U.S. Geological Survey's (USGS) National Coal Resource Assessment (NCRA) of the Gulf Coastal Plain Coal Province, which also includes coal-bearing areas in the states of Texas, Louisiana, Alabama, Mississippi, Tennessee, and Kentucky (see <a class="link link-ref link-reveal xref-bibr"...
History of wildlife toxicology and the interpretation of contaminant concentrations in tissues
Barnett A. Rattner, Anton M. Scheuhammer, J. E. Elliott
W. Nelson Beyer, James P. Meador, editor(s)
2011, Book chapter, Environmental contaminants in biota: Interpreting tissue concentrations
The detection and interpretation of contaminants in tissues of wildlife belongs to the field of toxicology, a scientific discipline with a long, intriguing, and illustrious history. Concern over poisoning of wildlife began in the late nineteenth century, and initially focused more on identifying environmental problems than determining contaminant concentrations in...
Inland surface water: Chapter 18
Jill Baron, C. T. Driscoll, J.L. Stoddard
2011, General Technical Report NRS-80
Freshwater aquatic ecosystems include rivers and streams, large and small lakes, reservoirs, and ephemeral ponds. Wetlands are defi ned and discussed in Chapter 17 of this report. It is estimated that there are 123,400 lakes with a surface area greater than 4 ha in the United States. Most lakes, however,...
Paleocene coal deposits of the Wilcox group, central Texas
Robert W. Hook, Peter D. Warwick, John R. SanFilipo, Adam C. Schultz, Douglas J. Nichols, Sharon M. Swanson
Peter D. Warwick, Alexander K. Karlsen, Matthew D. Merrill, Brett J. Valentine, editor(s)
2011, Book chapter, Geologic assessment of coal in the Gulf of Mexico coastal plain
Coal deposits in the Wilcox Group of central Texas have been regarded as the richest coal resources in the Gulf Coastal Plain. Although minable coal beds appear to be less numerous and generally higher in sulfur content (1 percent average, as-received basis; table 1) than Wilcox coal deposits in the...
