Concentration and distribution of sixty-one elements in coals from DPR Korea
Jiawen Hu, B. Zheng, R. B. Finkelman, B. Wang, M. Wang, S. Li, D. Wu
2006, Fuel (85) 679-688
Fifty coal samples (28 anthracite and 22 lignites) were collected from both main and small coal mines in DPR Korea prioritized by resource distribution and coal production. The concentrations of 61 elements in 50 coal samples were determined by several multielement and element-specific techniques, including inductively coupled plasma atomic emission...
Trophic structure and avian communities across a salinity gradient in evaporation ponds of the San Francisco Bay estuary
John Y. Takekawa, A.K. Miles, D. H. Schoellhamer, N.D. Athearn, M. K. Saiki, W.D. Duffy, S. Kleinschmidt, G.G. Shellenbarger, C.A. Jannusch
2006, Hydrobiologia (567) 307-327
Commercial salt evaporation ponds comprise a large proportion of baylands adjacent to the San Francisco Bay, a highly urbanized estuary. In the past two centuries, more than 79% of the historic tidal wetlands in this estuary have been lost. Resource management agencies have acquired more than 10 000 ha of commercial salt...
Polychlorinated biphenyl congener patterns in tree swallows (Tachycineta bicolor) nesting in the Housatonic River watershed, western Massachusetts, USA, using a novel statistical approach
Christine M. Custer, L.B. Read
2006, Environmental Pollution (142) 235-245
A novel application of a commonly used statistical approach was used to examine differences in polychlorinated biphenyl (PCB) congener Patterns among locations and sample matrices in tree swallows (Tachycineta bicolor) nesting in the Housatonic River watershed in western Massachusetts. USA. The most prevalent PCB congeners in tree swallow tissue samples...
Genetic structure of Cantharellus formosus populations in a second-growth temperate rain forest of the Pacific Northwest
Regina S. Redman, Judith Ranson, Rusty J. Rodriguez
2006, Pacific Northwest Fungi (1) 1-13
Cantharellus formosus growing on the Olympic Peninsula of the Pacific Northwest was sampled from September – November 1995 for genetic analysis. A total of ninety-six basidiomes from five clusters separated from one another by 3 - 25 meters were genetically characterized by PCR analysis of 13 arbitrary loci and rDNA sequences. The number...
Evaluating redband trout habitat in sagebrush desert basins in southwestern Idaho
B.W. Zoellick, B.S. Cade
2006, North American Journal of Fisheries Management (26) 268-281
We estimated abundance quantiles of redband trout Oncorhynchus mykiss gairdneri relative to five site-specific habitat variables (stream shading, bank cover, bank stability, fine sediment in the stream substrate, and cover for adults) and one landscape variable (distance from stream headwaters) on 30 streams in southwestern Idaho during 1993–1998. In addition,...
Sex determination of Pohnpei Micronesian kingfishers using morphological and molecular genetic techniques
Dylan C. Kesler, I.F. Lopes, Susan M. Haig
2006, Journal of Field Ornithology (77) 229-232
Conservation-oriented studies of Micronesian Kingfishers (Todiramphus cinnamominus) have been hindered by a lack of basic natural history information, despite the status of the Guam subspecies (T. c. cinnamominus) as one of the most endangered species in the world. We used tissue samples and morphometric measures from museum specimens and wild-captured...
Occurrence and fate of organic contaminants during onsite wastewater treatment
K.E. Conn, L. B. Barber, G.K. Brown, R.L. Siegrist
2006, Environmental Science & Technology (40) 7358-7366
Onsite wastewater treatment systems serve approximately 25% of the U.S. population. However, little is known regarding the occurrence and fate of organic wastewater contaminants (OWCs), including endocrine disrupting compounds, during onsite treatment. A range of OWCs including surfactant metabolites, steroids, stimulants, metal-chelating agents, disinfectants, antimicrobial agents, and...
Remote sensing studies of the Dionysius region of the Moon
Thomas A. Giguere, B. Ray Hawke, Lisa R. Gaddis, David T. Blewett, J. J. Gillis-Davis, Paul G. Lucey, G.A. Smith, P. D. Spudis, G.J. Taylor
2006, Journal of Geophysical Research E: Planets (111)
The Dionysius region is located near the western edge of Mare Tranquillitatis and is centered on Dionysius crater, which exhibits a well-developed dark ray system. Proposed origins for these dark rays included impact melt deposits and dark primary ejecta. The region also contains extensive deposits of Cayley-type light plains. Clementine...
Abundance and distribution of selected elements in soils, stream sediments, and selected forage plants from desert tortoise habitats in the Mojave and Colorado deserts, USA
M.A. Chaffee, K.H. Berry
2006, Journal of Arid Environments (67) 35-87
A baseline and background chemical survey was conducted in southeastern California, USA, to identify potential sources of toxicants in natural and anthropogenically-altered habitats of the threatened desert tortoise (Gopherus agassizii). Soil, stream sediment, and plant samples were collected from six tortoise habitat study areas in the Mojave and Colorado deserts...
Sampling blood from big brown bats (Eptesicus fuscus) in the field with and without anesthesia: Impacts on survival
L.E. Ellison, T. J. O'Shea, J. Wimsatt, R.D. Pearce, D.J. Neubaum, M.A. Neubaum, R. A. Bowen
2006, Journal of Wildlife Diseases (42) 849-852
Blood was collected from wild big brown bats (Eptesicus fuscus) with and without anesthesia in Fort Collins, Colorado in 2004 to assess the impacts of these procedures on short-term survival and 1-yr return rates. Short-term survival and 1-yr return rates after release were passively monitored using PIT tag detection hoops...
Pharmaceuticals and other organic chemicals in selected north-central and northwestern Arkansas streams
B. E. Haggard, J.M. Galloway, W. R. Green, M. T. Meyer
2006, Journal of Environmental Quality (35) 1078-1087
Recently, our attention has focused on the low level detection of many antibiotics, pharmaceuticals, and other organic chemicals in water resources. The limited studies available suggest that urban or rural streams receiving wastewater effluent are more susceptible to contamination. The purpose of this study was to evaluate the occurrence of...
Derivation of planetary topography using multi-image shape-from-shading
Volker Lohse, Christian Heipke, Randolph L. Kirk
2006, Planetary and Space Science (54) 661-674
In many cases, the derivation of high-resolution digital terrain models (DTMs) from planetary surfaces using conventional digital image matching is a problem. The matching methods need at least one stereo pair of images with sufficient texture. However, many space missions provide only a few stereo images and planetary surfaces often...
Modeling physical and biogeochemical controls over carbon accumulation in a boreal forest soil
J.J. Carrasco, J. C. Neff, J.W. Harden
2006, Journal of Geophysical Research G: Biogeosciences (111)
Boreal soils are important to the global C cycle owing to large C stocks, repeated disturbance from fire, and the potential for permafrost thaw to expose previously stable, buried C. To evaluate the primary mechanisms responsible for both short- and long-term C accumulation in boreal soils, we developed a multi-isotope...
Tracer test with As(V) under variable redox conditions controlling arsenic transport in the presence of elevated ferrous iron concentrations
R. Hohn, M. Isenbeck-Schroter, D.B. Kent, J.A. Davis, R. Jakobsen, S. Jann, V. Niedan, C. Scholz, S. Stadler, A. Tretner
2006, Journal of Contaminant Hydrology (88) 36-54
To study transport and reactions of arsenic under field conditions, a small-scale tracer test was performed in an anoxic, iron-reducing zone of a sandy aquifer at the USGS research site on Cape Cod, Massachusetts, USA. For four weeks, a stream of groundwater with added As(V) (6.7 μM) and bromide...
Development of spatially diverse and complex dune-field patterns: Gran Desierto Dune Field, Sonora, Mexico
C. Beveridge, G. Kocurek, R.C. Ewing, N. Lancaster, P. Morthekai, A.K. Singhvi, S. A. Mahan
2006, Sedimentology (53) 1391-1409
The pattern of dunes within the Gran Desierto of Sonora, Mexico, is both spatially diverse and complex. Identification of the pattern components from remote-sensing images, combined with statistical analysis of their measured parameters demonstrate that the composite pattern consists of separate populations of simple dune patterns. Age-bracketing by optically stimulated...
Regional surficial geochemistry of the northern Great Basin
S. Ludington, H. Folger, B. Kotlyar, V.G. Mossotti, M.J. Coombs, T.G. Hildenbrand
2006, Economic Geology (101) 33-57
The regional distribution of arsenic and 20 other elements in stream-sediment samples in northern Nevada and southeastern Oregon was studied in order to gain new insights about the geologic framework and patterns of hydrothermal mineralization in the area. Data were used from 10,261 samples that were originally collected during the...
Branch length mediates flower production and inflorescence architecture of Fouquieria splendens (ocotillo)
Janice E. Bowers
2006, Plant Ecology (186) 87-95
The capacity of individual branches to store water and fix carbon can have profound effects on inflorescence size and architecture, thus on floral display, pollination, and fecundity. Mixed regression was used to investigate the relation between branch length, a proxy for plant resources, and floral display of Fouquieria splendens (ocotillo),...
PEPA-1* genotype affects return rate for hatchery steelhead
R.R. Reisenbichler, M.C. Hayes, S.P. Rubin, L.A. Wetzel, B.M. Baker
2006, Transactions of the American Fisheries Society (135) 28-39
Allozymes continue to be useful as genetic markers in a variety of studies; however, their utility often hinges on the selective neutrality of the allelic variation. Our study tested for neutrality between the two most common alleles (*100 and *110) at the cytosol nonspecific dipeptidase locus (PEPA-1*) in steelhead Oncorhynchus...
Deciphering igneous and metamorphic events in high-grade rocks of the Wilmington complex, Delaware: Morphology, cathodoluminescence and backscattered electron zoning, and SHRIMP U-Pb geochronology of zircon and monazite
J. N. Aleinikoff, W.S. Schenck, M.O. Plank, L.A. Srogi, C.M. Fanning, S.L. Kamo, H. Bosbyshell
2006, Geological Society of America Bulletin (118) 39-64
High-grade rocks of the Wilmington Complex, northern Delaware and adjacent Maryland and Pennsylvania, contain morphologically complex zircons that formed through both igneous and metamorphic processes during the development of an island-arc complex and suturing of the arc to Laurentia. The arc complex has been divided into several members, the protoliths...
Blood lead levels of wild Steller's eiders (Polysticta stelleri) and black scoters (Melanitta nigra) in Alaska using a portable blood lead analyzer
Corrine S. Brown, Joanne Luebbert, Daniel M. Mulcahy, Jason L. Schamber, Daniel H. Rosenberg
2006, Journal of Zoo and Wildlife Medicine (37) 361-365
Sea duck populations are declining in Alaska. The reasons for the decline are not known; environmental lead exposure is one suspected cause. Thirty wild Steller's eider ducks (Polysticta stelleri) and 40 wild black scoter ducks (Melanitta nigra) were tested for blood lead levels using a portable blood lead analyzer (LeadCare;...
Greater sage-grouse as an umbrella species for sagebrush-associated vertebrates
M.M. Rowland, M.J. Wisdom, L.H. Suring, C.W. Meinke
2006, Biological Conservation (129) 323-335
Widespread degradation of the sagebrush ecosystem in the western United States, including the invasion of cheatgrass, has prompted resource managers to consider a variety of approaches to restore and conserve habitats for sagebrush-associated species. One such approach involves the use of greater sage-grouse, a species of prominent conservation interest, as...
Associations of breeding birds with fire-influenced and riparian-upland gradients in a longleaf pine ecosystem
J. C. Allen, S.M. Krieger, J. R. Walters, J.A. Collazo
2006, The Auk (123) 1110-1128
We determined the effects of fire history and a riparian-upland gradient on the breeding bird community at Fort Bragg Military Installation in North Carolina, one of the largest remnant areas of the endangered longleaf pine (Pinus palustris) ecosystem. Study sites were classified into two treatments: fire-intense (areas experiencing growing-season burns)...
A new species of freshwater mussel (Bivalvia: Unionidae), Pleurobema athearni, from the Coosa River Drainage of Alabama, USA
M.M. Gangloff, J.D. Williams, J.W. Feminella
2006, Zootaxa 43-56
The Mobile Basin historically supported one of the most diverse freshwater mussel (Bivalvia: Unionidae) assemblages in North America. More than 65 species of mussels are known from the Basin, but it is difficult to determine how many species were present historically. The drainage's unique physical habitat was largely destroyed between...
Scaling uncertainties in estimating canopy foliar maintenance respiration for black spruce ecosystems in Alaska
X. Zhang, A. D. McGuire, Roger W. Ruess
2006, Mitigation and Adaptation Strategies for Global Change (11) 147-174
A major challenge confronting the scientific community is to understand both patterns of and controls over spatial and temporal variability of carbon exchange between boreal forest ecosystems and the atmosphere. An understanding of the sources of variability of carbon processes at fine scales and how these contribute to uncertainties in...
Multiple constraints on the age of a Pleistocene lava dam across the Little Colorado River at Grand Falls, Arizona
W. Duffield, N. Riggs, D. Kaufman, D. Champion, C. Fenton, S. Forman, W. McIntosh, R. Hereford, J. Plescia, M. Ort
2006, Geological Society of America Bulletin (118) 421-429
The Grand Falls basalt lava flow in northern Arizona was emplaced in late Pleistocene time. It flowed 10 km from its vent area to the Little Colorado River, where it cascaded into and filled a 65-m-deep canyon to form the Grand Falls lava dam. Lava continued ???25 km downstream and...
