Competing risks and the development of adaptive management plans for water resources: Field reconnaissance investigation of risks to fishes and other aquatic biota exposed to endocrine disrupting chemicals (edcs) in lake mead, Nevada USA
G. Linder, E. E. Little
2009, Conference Paper, Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers
The analysis and characterization of competing risks for water resources rely on a wide spectrum of tools to evaluate hazards and risks associated with their management. For example, waters of the lower Colorado River stored in reservoirs such as Lake Mead present a wide range of competing risks related to...
Detrital U-Pb zircon dating of lower Ordovician syn-arc-continent collision conglomerates in the Irish Caledonides
P.D. Clift, A. Carter, A.E. Draut, H.V. Long, D.M. Chew, H.A. Schouten
2009, Tectonophysics (479) 165-174
The Early Ordovician Grampian Orogeny in the British Isles represents a classic example of collision between an oceanic island arc and a passive continental margin, starting around 480 Ma. The South Mayo Trough in western Ireland preserves a complete and well-dated sedimentary record of arc collision. We sampled sandstones and...
Analysis of hydromechanical well tests in fractured sedimentary rock at the NAWC site, New Jersey
L.C. Murdoch, D.B. Hisz, J.F. Ebenhack, D.E. Fowler, C. R. Tiedeman, L.N. Germanovich
2009, Conference Paper, 43rd U.S. Rock Mechanics Symposium and 4th U.S.-Canada Rock Mechanics Symposium
No abstract available....
High-frequency Rayleigh-wave method
J. Xia, R. D. Miller, Y. Xu, Y. Luo, C. Chen, J. Liu, J. Ivanov, C. Zeng
2009, Earth Science (20) 563-579
High-frequency (≥2 Hz) Rayleigh-wave data acquired with a multichannel recording system have been utilized to determine shear (S)-wave velocities in near-surface geophysics since the early 1980s. This overview article discusses the main research results of high-frequency surface-wave techniques achieved by research groups at the Kansas Geological...
Evaluating highly resolved paleoclimate records in the frequency domain for multidecadal-scale climate variability
Kristine L. DeLong, Terrence M. Quinn, Gary T. Mitchum, Richard Z. Poore
2009, Geophysical Research Letters (36)
[1] Do the chronological methods used in the construction of paleoclimate records influence the results of the frequency analysis applied to them? We explore this phenomenon using the Dongge Cave speleothem record (U-series chronology with variable time steps, Δt) and the El Malpais tree-ring index (cross-dating...
Composition and location of simulated lake-shore redds influence incubation success in kokanee, Oncorhynchus nerka
M.J. Fincel, S. R. Chipps, D.H. Bennett
2009, Fisheries Management and Ecology (16) 395-398
Methods for improving spawning habitat for lakeshore spawning kokanee, Oncorhynchus nerka (Walbaum), were explored by quantifying incubation success of embryos exposed to three substrate treatments in Lake Pend Oreille, Idaho, USA. Substrate treatments included no modification that used existing gravels in the lake (EXISTING), a cleaned substrate treatment where existing...
Performance of temperature and dissolved oxygen criteria to predict habitat use by lake trout (Salvelinus namaycush)
J.M. Plumb, P.J. Blanchfield
2009, Canadian Journal of Fisheries and Aquatic Sciences (66) 2011-2023
We compared theoretical habitat volumes, determined from traditional combinations of temperature and dissolved oxygen concentration (DO) boundaries, with in situ habitat use by acoustically tagged lake trout (Salvelinus namaycush). The widely used criteria of 8–12 °C underestimated lake trout habitat use by 68%–80%. Instead, combined temperature (<12 or 15 °C)...
Sediment losses and gains across a gradient of livestock grazing and plant invasion in a cool, semi-arid grassland, Colorado Plateau, USA
Jayne Belnap, Richard L. Reynolds, Marith C. Reheis, Susan L. Phillips, Frank Urban, Harland L. Goldstein
2009, Aeolian Research (1) 27-43
Large sediment fluxes can have significant impacts on ecosystems. We measured incoming and outgoing sediment across a gradient of soil disturbance (livestock grazing, plowing) and annual plant invasion for 9 years. Our sites included two currently ungrazed sites: one never grazed by livestock and dominated by perennial grasses/well-developed biocrusts and...
Diurnal stream habitat use of juvenile Atlantic salmon, brown trout and rainbow trout in winter
J. H. Johnson, K.A. Douglass
2009, Fisheries Management and Ecology (16) 352-359
The diurnal winter habitat of three species of juvenile salmonids was examined in a tributary of Skaneateles Lake, NY to compare habitat differences among species and to determine if species/age classes were selecting specific habitats. A total of 792 observations were made on the depth, velocity, substrate and cover (amount...
Genetic and serological typing of European infectious haematopoietic necrosis virus (IHNV) isolates
T. Johansson, K. Einer-Jensen, W. Batts, P. Ahrens, C. Bjorkblom, Gael Kurath, H. Bjorklund, N. Lorenzen
2009, Diseases of Aquatic Organisms (86) 213-221
Infectious haematopoietic necrosis virus (IHNV) causes the lethal disease infectious haematopoietic necrosis (IHN) in juvenile salmon and trout. The nucleocapsid (N) protein gene and partial glycoprotein (G) gene (nucleotides 457 to 1061) of the European isolates IT-217A, FR-32/87, DE-DF 13/98 11621, DE-DF 4/99-8/99, AU-9695338 and RU-FR1 were sequenced and compared...
Combining particle-tracking and geochemical data to assess public supply well vulnerability to arsenic and uranium
S.R. Hinkle, L. J. Kauffman, M.A. Thomas, C. J. Brown, K. A. McCarthy, S. M. Eberts, Michael R. Rosen, B. G. Katz
2009, Journal of Hydrology (376) 132-142
Flow-model particle-tracking results and geochemical data from seven study areas across the United States were analyzed using three statistical methods to test the hypothesis that these variables can successfully be used to assess public supply well vulnerability to arsenic and uranium. Principal components analysis indicated that arsenic and uranium concentrations...
Evaluating wildlife response to coastal dune habitat restoration in san francisco, california
W. Russell, J. Shulzitski, A. Setty
2009, Ecological Restoration (27) 439-448
The vast dune system that once dominated the entire western half of the San Francisco peninsula in California has been reduced to a few fragments that conserve locally threatened plant and animal species. We measured the effects of ongoing restoration efforts on wildlife abundance and diversity on one of the...
The Reocín zinc-lead deposit, Spain: paleomagnetic dating of a late Tertiary ore body
David T. A. Symons, Michael T. Lewchuk, Kazuo Kawasaki, Francisco Velasco, David L. Leach
2009, Mineralium Deposita (44) 867-880
The Reocín mine in northern Spain’s Basque–Cantabrian basin exploited a world-class Mississippi Valley-type Zn–Pb deposit. Its epigenetic mineralization is in Urgonian 116 ± 1 Ma dolomitized limestones of the Santillana syncline, which was formed by Oligocene and mid Miocene pulses of the Pyrenean orogeny. Paleomagnetic results (22 sites, 274 specimens) in mineralization isolated...
Seasonal-scale nearshore morphological evolution: Field observations and numerical modeling
P. Ruggiero, D.-J.R. Walstra, G. Gelfenbaum, Ormondt M. van
2009, Coastal Engineering (56) 1153-1172
A coupled waves-currents-bathymetric evolution model (DELFT-3D) is compared with field measurements to test hypotheses regarding the processes responsible for alongshore varying nearshore morphological changes at seasonal time scales. A 2001 field experiment, along the beaches adjacent to Grays Harbor, Washington, USA, captured the transition between the high-energy erosive conditions of...
Contributions of vital rates to growth of a protected population of American black bears
M.S. Mitchell, L.B. Pacifici, J.B. Grand, R. A. Powell
2009, Ursus (20) 77-84
Analyses of large, long-lived animals suggest that adult survival generally has the potential to contribute more than reproduction to population growth rate (λ), but because survival varies little, high variability in reproduction can have a greater influence. This pattern has been documented for several species...
Seismic reflection characteristics of naturally-induced subsidence affecting transportation
R. D. Miller, J. Xia, D.W. Steeples
2009, Conference Paper, Journal of Earth Science
High-resolution seismic reflections have been used effectively to investigate sinkholes formed from the dissolution of a bedded salt unit found throughout most of Central Kansas. Surface subsidence can have devastating effects on transportation structures. Roads, rails, bridges, and pipelines can even be dramatically affected by minor ground instability. Areas susceptible...
Effects of introduced fish on macroinvertebrate communities in historically fishless headwater and kettle lakes
Emily Gaenzle Schilling, Cynthia S. Loftin, Alexander D. Huryn
2009, Biological Conservation (142) 3030-3038
Widespread fish introductions have led to a worldwide decline in the number of fishless lakes and their associated communities. Studies assessing effects of fish stocking on native communities in historically fishless lakes have been limited to high-elevation headwater lakes stocked with non-native trout. Little is known about the effect of...
Relative abundance and species richness of cerambycid beetles in partial cut and uncut bottomland hardwood forests
P. Newell, S. King
2009, Canadian Journal of Forest Research (39) 2100-2108
Partial cutting techniques are increasingly advocated and used to create habitat for priority wildlife. However, partial cutting may or may not benefit species dependent on deadwood; harvesting can supplement coarse woody debris in the form of logging slash, but standing dead trees may be targeted for removal. We sampled cerambycid...
On constraining pilot point calibration with regularization in PEST
M.N. Fienen, C.T. Muffels, R. J. Hunt
2009, Ground Water (47) 835-844
Ground water model calibration has made great advances in recent years with practical tools such as PEST being instrumental for making the latest techniques available to practitioners. As models and calibration tools get more sophisticated, however, the power of these tools can be misapplied, resulting in poor parameter estimates and/or...
Disturbance alters local-regional richness relationships in appalachian forests
R.T. Belote, N.J. Sanders, R.H. Jones
2009, Ecology (90) 2940-2947
Whether biological diversity within communities is limited by local interactions or regional species pools remains an important question in ecology. In this paper, we investigate how an experimentally applied tree-harvesting disturbance gradient influenced local-regional richness relationships. Plant species richness was measured at three spatial scales (2 ha = regional; 576...
Elevated naturally occurring arsenic in a semiarid oxidizing system, Southern High Plains aquifer, Texas, USA
Bridget R. Scanlon, J.-P. Nicot, R.C. Reedy, D. Kurtzman, A. Mukherjee, D. Kirk Nordstrom
2009, Applied Geochemistry (24) 2061-2071
High groundwater As concentrations in oxidizing systems are generally associated with As adsorption onto hydrous metal (Al, Fe or Mn) oxides and mobilization with increased pH. The objective of this study was to evaluate the distribution, sources and mobilization mechanisms of As in the Southern High Plains (SHP) aquifer, Texas,...
Variation in movement patterns of red drum (Sciaenops ocellatus) inferred from conventional tagging and ultrasonic telemetry
N.M. Bacheler, L.M. Paramore, S. M. Burdick, J.A. Buckel, J.E. Hightower
2009, Fishery Bulletin (107) 405-419
We used 25 years of conventional tagging data (n=6173 recoveries) and 3 years of ultrasonic telemetry data (n=105 transmitters deployed) to examine movement rates and directional preferences of four age classes of red drum (Sciaenops ocellatus) in estuarine and coastal waters of North Carolina. Movement rates of conventionally tagged red...
Coarse-grained sediment delivery and distribution in the Holocene Santa Monica Basin, California: Implications for evaluating source-to-sink flux at millennial time scales
B.W. Romans, W. R. Normark, M.M. McGann, J.A. Covault, S.A. Graham
2009, Geological Society of America Bulletin (121) 1394-1408
Utilizing accumulations of coarse-grained terrigenous sediment from deep-marine basins to evaluate the relative contributions of and history of controls on sediment flux through a source-to-sink system has been difficult as a result of limited knowledge of event timing. In this study, six new radiocarbon (14C) dates are integrated with five...
New Permian durhaminid cerioid corals from east-central California
C.H. Stevens, P. Stone
2009, Journal of Paleontology (83) 946-953
Permian colonial corals from Artinskian to Kungurian strata in the Conglomerate Mesa area, Inyo Mountains, east-central California, include five new species, one of which is assigned to a new genus. The new taxa are: Malpaisia maceyi n. gen. and n. sp., Pararachnastraea bellula n. sp., P. delicata n. sp., P....
Incised channel fills containing conifers indicate that seasonally dry vegetation dominated Pennsylvanian tropical lowlands
H. J. Falcon-Lang, W.J. Nelson, S. Elrick, C.V. Looy, P.R. Ames, William A. DiMichele
2009, Geology (37) 923-926
The idea that the Pennsylvanian tropical lowlands were temporally dominated by rainforest (i.e., the Coal Forest) is deeply ingrained in the literature. Here we challenge two centuries of research by suggesting that this concept is based on a taphonomic artifact, and that seasonally dry vegetation dominated instead. This controversial finding...
