Evaluating the potential for watershed restoration to reduce nutrient loading to Upper Klamath Lake, Oregon
Paul V. McCormick, Sharon G. Campbell
2007, Open-File Report 2007-1168
A literature review of best management practices to reduce nutrient loading was performed to provide information for resource managers in the Klamath Basin, Oregon. Although BMPs have already been implemented in the watershed, some sense of their effectiveness in reducing phosphorus loading and their cost for installation and maintenance is...
Latin hypercube approach to estimate uncertainty in ground water vulnerability
J.J. Gurdak, J.E. McCray, G. Thyne, S.L. Qi
2007, Ground Water (45) 348-361
A methodology is proposed to quantify prediction uncertainty associated with ground water vulnerability models that were developed through an approach that coupled multivariate logistic regression with a geographic information system (GIS). This method uses Latin hypercube sampling (LHS) to illustrate the propagation of input error and estimate uncertainty associated with...
A simple model for the spatially-variable coastal response to hurricanes
H.F. Stockdon, A. H. Sallenger Jr., R.A. Holman, P.A. Howd
2007, Marine Geology (238) 1-20
The vulnerability of a beach to extreme coastal change during a hurricane can be estimated by comparing the relative elevations of storm-induced water levels to those of the dune or berm. A simple model that defines the coastal response based on these elevations was used to hindcast the potential impact...
Estimation of evapotranspiration by reed canarygrass using field observations and model simulations
K. E. Schilling, James R. Kiniry
2007, Journal of Hydrology (337) 356-363
Reed canarygrass (Phalaris arundinacea) commonly invades meadow wetlands, effectively dominating water use and outcompeting native plants. Objectives of this study were to (i) estimate daily, seasonal and annual water use by reed canarygrass using shallow water table fluctuations; and (ii) calibrate the ALMANAC (Agricultural Land Management Alternative with Numerical Assessment...
Ambiguous taxa: Effects on the characterization and interpretation of invertebrate assemblages
T. F. Cuffney, Michael D. Bilger, A.M. Haigler
2007, Journal of the North American Benthological Society (26) 286-307
Damaged and immature specimens often result in macroinvertebrate data that contain ambiguous parent-child pairs (i.e., abundances associated with multiple related levels of the taxonomic hierarchy such as Baetis pluto and the associated ambiguous parent Baetis sp.). The choice of method used to resolve ambiguous parent-child pairs may have a very...
Toxicity of cobalt-complexed cyanide to Oncorhynchus mykiss, Daphnia magna, and Ceriodaphnia dubia: Potentiation by ultraviolet radiation and attenuation by dissolved organic carbon and adaptive UV tolerance
Edward E. Little, Robin D. Calfee, Peter M. Theodorakos, Zoe Ann Brown, Craig A. Johnson
2007, Environmental Science and Pollution Research (14) 333-337
BackgroundCobalt cyanide complexes often result when ore is treated with cyanide solutions to extract gold and other metals. These have recently been discovered in low but significant concentrations in effluents from gold leach operations. This study was conducted to determine the potential toxicity of cobalt-cyanide complexes to freshwater organisms and...
The influence of river regulation and land use on floodplain forest regeneration in the semi-arid upper Colorado River Basin, USA
K. Northcott, D.C. Andersen, D.J. Cooper
2007, River Research and Applications (23) 565-577
Flow regulation effects on floodplain forests in the semi-arid western United States are moderately well understood, whereas effects associated with changes in floodplain land use are poorly documented. We mapped land cover patterns from recent aerial photos and applied a classification scheme to mainstem alluvial floodplains in 10 subjectively selected...
Zaphrentis and the Zaphrentidae (Devonian; anthozoa, rugosa)
W. A. Oliver Jr.
2007, Bulletins of American Paleontology (2007) 5-24
Zaphrentis is one of the most widely used names in Paleozoic coral paleontology. Species of "Zaphrentis" have been named from every Paleozoic System except the Cambrian. Variants of the word, such as zaphrentoid, are widely used with varied meanings. Nomenclatural spinoffs are numerous: Neozaphrentis and Heterophrentis are obvious examples, but...
Bioenergetic and pharmacokinetic model for exposure of common loon (Gavia immer) chicks to methylmercury
W. H. Karasov, K.P. Kenow, M.W. Meyer, F. Fournier
2007, Environmental Toxicology and Chemistry (26) 677-685
A bioenergetics model was used to predict food intake of common loon (Gavia immer) chicks as a function of body mass during development, and a pharmacokinetics model, based on first-order kinetics in a single compartment, was used to predict blood Hg level as a function of food intake rate, food...
Biodegradation of PAHs and PCBs in soils and sludges
L. Liu, J.A. Tindall, M.J. Friedel
2007, Water, Air, & Soil Pollution (181) 281-296
Results from a multi-year, pilot-scale land treatment project for PAHs and PCBs biodegradation were evaluated. A mathematical model, capable of describing sorption, sequestration, and biodegradation in soil/water systems, is applied to interpret the efficacy of a sequential active-passive biotreatment process of organic chemicals on remediation sites. To account for the...
Spectroscopic evidence for uranium bearing precipitates in vadose zone sediments at the Hanford 300-area site
Y. Arai, M.A. Marcus, N. Tamura, J.A. Davis, J.M. Zachara
2007, Environmental Science & Technology (41) 4633-4639
Uranium (U) solid-state speciation in vadose zone sediments collected beneath the former North Process Pond (NPP) in the 300 Area of the Hanford site (Washington) was investigated using multi-scale techniques. In 30 day batch experiments, only a small fraction of total U (???7.4%) was released to artificial groundwater solutions equilibrated...
Tracking environmental dynamics and agricultural intensification in southern Mali
G. Gray Tappan, M. McGahuey
2007, Agricultural Systems (94) 38-51
The Office de la Haute Vallée du Fleuve Niger (OHVN) zone in southern Mali is a small but important agricultural production region. Against a background of environmental degradation including decades of declining rainfall, soil erosion, and human pressure on forest resources, numerous farming communities stand out through the use of...
Possible ancient giant basin and related water enrichment in the Arabia Terra province, Mars
J. M. Dohm, N.G. Barlow, R. C. Anderson, J.-P. Williams, H. Miyamoto, J.C. Ferris, R.G. Strom, G.J. Taylor, A.G. Fairen, V.R. Baker, W. V. Boynton, J.M. Keller, K. Kerry, D. Janes, J.A.P. Rodriguez, T.M. Hare
2007, Icarus (190) 74-92
A circular albedo feature in the Arabia Terra province was first hypothesized as an ancient impact basin using Viking-era information. To test this unpublished hypothesis, we have analyzed the Viking era-information together with layers of new data derived from the Mars Global Surveyor (MGS) and Mars Odyssey (MO) missions. Our...
A closer look at water-related geologic activity on Mars
Alfred S. McEwen, C.J. Hansen, W.A. Delamere, E. M. Eliason, Kenneth E. Herkenhoff, Laszlo P. Keszthelyi, V. C. Gulick, Randolph L. Kirk, M. T. Mellon, J. A. Grant, N. Thomas, C.M. Weitz, S. W. Squyres, N.T. Bridges, S.L. Murchie, F. Seelos, K. Seelos, C.H. Okubo, M.P. Milazzo, L.L. Tornabene, W.L. Jaeger, S. Byrne, P.S. Russell, J.L. Griffes, S. Martinez-Alonso, A. Davatzes, F. C. Chuang, B.J. Thomson, K.E. Fishbaugh, C. M. Dundas, K.J. Kolb, M. E. Banks, J.J. Wray
2007, Science (317) 1706-1709
Water has supposedly marked the surface of Mars and produced characteristic landforms. To understand the history of water on Mars, we take a close look at key locations with the High-Resolution Imaging Science Experiment on board the Mars Reconnaissance Orbiter, reaching fine spatial scales of 25 to 32 centimeters per...
Functional groups in a single pteridosperm species: Variability and circumscription (Pennsylvanian, Nova Scotia, Canada)
E.L. Zodrow, Maria Mastalerz
2007, International Journal of Coal Geology (70) 313-324
Multiple foliar specimens of the Late Pennsylvanian fossil pteridosperm [gymnosperm] Alethopteris zeilleri (Ragot) Wagner were collected from one restricted stratigraphical horizon in the Canadian Sydney Coalfield. Variability of functional-group distribution using FTIR technique was studied in compressions, adaxial versus abaxial cuticles, and in unseparated cuticles as a function of maceration...
Current-use pesticides and organochlorine compounds in precipitation and lake sediment from two high-elevation national parks in the Western United States
M.A. Mast, W.T. Foreman, S.V. Skaates
2007, Archives of Environmental Contamination and Toxicology (52) 294-305
Current-use pesticides (CUPs) and banned organochlorine compounds (OCCs) were measured in precipitation (snowpack and rain) and lake sediments from two national parks in the Western United States to determine their occurrence and distribution in high-elevation environments. CUPs frequently detected in snow were endosulfan, dacthal, and chlorothalonil in concentrations ranging from...
Influence of the diversion of Bear River into Bear Lake (Utah and Idaho) on the environment of deposition of carbonate minerals
W.E. Dean, R. M. Forester, Jordon Bright, R.Y. Anderson
2007, Limnology and Oceanography (52) 1094-1111
Bear River, the largest river in the Great Basin, had some of its flow diverted into Bear Lake through a series of canals constructed between 1911 and 1918, turning Bear Lake into a reservoir. The prediversion lake had an unusually high Mg2+ : Ca2+ ratio (38 by weight), which resulted...
A new species of Pentadinium from Eastern Anatolia, Turkey, Pentadinium galileoi
R.H. Sancay, Z. Bati, Lucy E. Edwards, K.I. Ertug
2007, Micropaleontology (52) 537-543
The new gonyaulacoid dinoflagellate Pentadinium galileoi Sancay et al., sp. nov. from the Oligocene-Lower Miocene sediments of Eastern Anatolia has been identified. It is spherical, chordate with prominant discoidal cingulum and distally furcate apical, sulcal, and antapical processes. It has a type P(3???) archeopyle, and periarcheopyle is larger than endoarcheopyle....
Biparental incubation in the chestnut-vented tit-babbler Parisoma subcaeruleum: Mates devote equal time, but males keep eggs warmer
S.K. Auer, R.D. Bassar, T. E. Martin
2007, Journal of Avian Biology (38) 278-283
Biparental care in birds is less common during incubation than in other nesting stages. Males share in incubating eggs in a minority of bird species, and male effort is generally thought to be lower than females when sharing does occur. However, male assistance and incubation efficacy is poorly studied in...
The landsat image mosaic of the Antarctica Web Portal
C.J. Rusanowski
2007, Data Science Journal (6) S333-S352
People believe what they can see. The Poles exist as a frozen dream to most people. The International Polar Year wants to break the ice (so to speak), open up the Poles to the general public, support current polar research, and encourage new research projects. The IPY officially begins in March,...
Molecular systematics of Serrasalmidae: Deciphering the identities of piranha species and unraveling their evolutionary histories
B. Freeman, L.G. Nico, M. Osentoski, H.L. Jelks, T.M. Collins
2007, Zootaxa 1-38
Piranhas and their relatives have proven to be a challenging group from a systematic perspective, with difficulties in identification of species, linking of juveniles to adults, diagnosis of genera, and recognition of higher-level clades. In this study we add new molecular data consisting of three mitochondrial regions for museum vouchered...
A new, large, late pleistocene demosponge from Southeastern Florida
J.K. Rigby, K.J. Cunningham
2007, Journal of Paleontology (81) 788-793
[No abstract available]...
Using a coupled eco-hydrodynamic model to predict habitat for target species following dam removal
C.A. Tomsic, T.C. Granata, R.P. Murphy, C.J. Livchak
2007, Ecological Engineering (30) 215-230
A habitat suitability index (HSI) model was developed for a water quality sensitive fish (Greater Redhorse) and macroinvertebrate (Plecoptera) species to determine the restoration success of the St. John Dam removal for the Sandusky River (Ohio). An ArcGIS?? model was created for pre- and post-dam removal scenarios. Inputs to the...
Probabilistic seismic demand analysis using advanced ground motion intensity measures
P. Tothong, N. Luco
2007, Earthquake Engineering and Structural Dynamics (36) 1837-1860
One of the objectives in performance-based earthquake engineering is to quantify the seismic reliability of a structure at a site. For that purpose, probabilistic seismic demand analysis (PSDA) is used as a tool to estimate the mean annual frequency of exceeding a specified value of a structural demand parameter (e.g....
Holocene sea-level oscillations and environmental changes on the Eastern Black Sea shelf
E.V. Ivanova, I.O. Murdmaa, A.L. Chepalyga, T. M. Cronin, I.V. Pasechnik, O.V. Levchenko, S. S. Howe, A.V. Manushkina, E.A. Platonova
2007, Palaeogeography, Palaeoclimatology, Palaeoecology (246) 228-259
A multi-proxy study of four sediment cores from the Eastern (Caucasian) Black Sea shelf revealed five transgressive-regressive cycles overprinted on the general trend of glacioeustatic sea-level rise during the last 11,000??14C yr. These cycles are well represented in micro-and macrofossil assemblages, sedimentation rates, and grain size variations. The oldest recovered...
