Palaeomagnetic intensities from 14C-dated lava flows on the Big Island, Hawaii: 0-21 kyr
Nicola Pressling, Carlo Laj, Catherie Kissel, Duane E. Champion, David Gubbins
2006, Earth and Planetary Science Letters (247) 26-40
Thellier–Thellier experiments were carried out on 216 lava samples collected by the USGS on the Big Island. 35 individual flows from the Kilauea, Mauna Loa and Hualalai volcanoes are represented and independent radiocarbon dating of the flows yields absolute ages ranging from 290 to 20,240 yrs old. The palaeomagnetic analysis was...
Radiometric ages of the Fire Clay tonstein [Pennsylvanian (Upper Carboniferous), Westphalian, Duckmantian]: A comparison of U-Pb zircon single-crystal ages and 40Ar/39Ar sanidine single-crystal plateau ages
P.C. Lyons, T.E. Krogh, Y.Y. Kwok, D.W. Davis, W.F. Outerbridge, H. T. Evans Jr.
2006, International Journal of Coal Geology (67) 259-266
The Fire Clay tonstein [Pennsylvanian (Upper Carboniferous), Westphalian Series, Duckmantian Stage]-a kaolinized, volcanic-ash deposit occurring in Kentucky, West Virginia, Tennessee, and Virginia-is the most widespread bed in the Middle Pennsylvanian of the central Appalachian basin, USA. A concordant single-crystal U-Pb zircon datum for this tonstein gives a 206Pb/238U age of...
Steelhead of the south-central/southern California coast: Population characterization for recovery planning
David A. Boughton, P.B. Adams, E. Anderson, Craig Fusaro, E. Keller, Elsie Kelley, Leo Lentsch, J. L. Nielsen, Katie Perry, Helen Regan, C. Swift, Fred Watson
2006, Report
This report by the National Marine Fisheries Service applies a formal evaluation framework to the problem of delineating Oncorhynchus mykiss populations in the South-Central/Southern California Coast recovery domain, in support of recovery planning under the Endangered Species Act....
Niche evolution and adaptive radiation: Testing the order of trait divergence
D. D. Ackerly, D.W. Schwilk, C.O. Webb
2006, Ecology (87)
In the course of an adaptive radiation, the evolution of niche parameters is of particular interest for understanding modes of speciation and the consequences for coexistence of related species within communities. We pose a general question: In the course of an evolutionary radiation, do traits related to within-community niche differences...
Introduction of translation stop codons into the viral glycoprotein gene in a fish DNA vaccine eliminates induction of protective immunity
K.A. Garver, C. M. Conway, Gael Kurath
2006, Marine Biotechnology (8) 351-356
A highly efficacious DNA vaccine against a fish rhabdovirus, infectious hematopoietic necrosis virus (IHNV), was mutated to introduce two stop codons to prevent glycoprotein translation while maintaining the plasmid DNA integrity and RNA transcription ability. The mutated plasmid vaccine, denoted pIHNw-G2stop, when injected intramuscularly into fish at high doses, lacked...
Spatial nonlinearities: Cascading effects in the earth system
Debra P.C. Peters, R.A. Pielke, B.T. Bestelmeyer, Craig D. Allen, Stuart Munson-McGee, K. M. Havstad
Josep G. Canadell, Diane E. Pataki, Louis F. Pitelka, editor(s)
2006, Book chapter, Terrestrial ecosystems in a changing world
Nonlinear behavior is prevalent in all aspects of the Earth System, including ecological responses to global change (Gallagher and Appenzeller 1999; Steffen et al. 2004). Nonlinear behavior refers to a large, discontinuous change in response to a small change in a driving variable (Rial et al. 2004). In contrast to...
Flow and form in rehabilitation of large-river ecosystems: an example from the Lower Missouri River
R. B. Jacobson, D.L. Galat
2006, Geomorphology (77) 249-269
On large, intensively engineered rivers like the Lower Missouri, the template of the physical habitat is determined by the nearly independent interaction of channel form and flow regime. We evaluated the interaction between flow and form by modeling four combinations of modern and historical channel form and modern and historical...
Distributions of exotic plants in eastern Asia and North America
Q. Guo, H. Qian, R. E. Ricklefs, W. Xi
2006, Ecology Letters (9) 827-834
Although some plant traits have been linked to invasion success, the possible effects of regional factors, such as diversity, habitat suitability, and human activity are not well understood. Each of these mechanisms predicts a different pattern of distribution at the regional scale. Thus, where climate and soils are similar, predictions...
Users' manual for the Hydroecological Integrity Assessment Process software (including the New Jersey Assessment Tools)
James A. Henriksen, John Heasley, Jonathan G. Kennen, Steven Nieswand
2006, Open-File Report 2006-1093
This manual is a user’s guide to four computer software tools that have been developed for the Hydroecological Integrity Assessment Process. The Hydroecological Integrity Assessment Process recognizes that streamflow is strongly related to many critical physiochemical components of rivers, such as dissolved oxygen, channel geomorphology, and water temperature, and can...
Far-field effects of early Tertiary ridge subduction in Alaska
D. C. Bradley, R.M. Friedman, P.W. Layer, Peter J. Haeussler, A.B. Till, S. M. Roeske, Marti L. Miller
2006, Conference Paper, Geological Society of America Abstracts with Programs Specialty Meeting No 2:91
No abstract available. ...
Set standard deviation, repeatability and offset of absolute gravimeter A10-008
D. Schmerge, O. Francis
2006, Metrologia (43) 414-418
The set standard deviation, repeatability and offset of absolute gravimeter A10-008 were assessed at the Walferdange Underground Laboratory for Geodynamics (WULG) in Luxembourg. Analysis of the data indicates that the instrument performed within the specifications of the manufacturer. For A10-008, the average set standard deviation was (1.6 0.6) ??Gal (1Gal...
Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA - Evidence from osmium isotopic and PGE systematics
S.R. Lee, J. Wright Horton Jr., R.J. Walker
2006, Meteoritics and Planetary Science (41) 819-833
The osmium isotope ratios and platinum-group element (PGE) concentrations of impact-melt rocks in the Chesapeake Bay impact structure were determined. The impact-melt rocks come from the cored part of a lower-crater section of suevitic crystalline-clast breccia in an 823 m scientific test hole over the central uplift at Cape Charles,...
The contribution of leaching to the rapid release of nutrients and carbon in the early decay of wetland vegetation
S. E. Davis III, D.L. Childers, G.B. Noe
2006, Hydrobiologia (569) 87-97
Our goal was to quantify the coupled process of litter turnover and leaching as a source of nutrients and fixed carbon in oligotrophic, nutrient-limited wetlands. We conducted poisoned and non-poisoned incubations of leaf material from four different perennial wetland plants (Eleocharis spp., Cladium jamaicense, Rhizophora mangle and Spartina alterniflora) collected...
Fifty-two years of pineapple-express storms across the West Coast of North America
M. D. Dettinger
2006, Report
No abstract available....
Modeling the transport and inactivation of E. coli and enterococci in the near-shore region of Lake Michigan
L. Liu, M.S. Phanikumar, S.L. Molloy, R.L. Whitman, D.A. Shively, M.B. Nevers, D.J. Schwab, J.B. Rose
2006, Environmental Science & Technology (40) 5022-5028
To investigate the transport and fate of fecal pollution at Great Lakes beaches and the health risks associated with swimming, the near-shore waters of Lake Michigan and two tributaries discharging into it were examined for bacterial indicators of human fecal pollution. The enterococcus human fecal pollution marker, which targets a...
Abundance of adult horseshoe crabs (Limulus polylphemus) in Delaware Bay estimated from a bay-wide mark-recapture study
D. R. Smith, M. J. Millard, S. Eyler
2006, Fishery Bulletin (104) 456-464
Estimates of the abundance of American horseshoe crabs (Limulus polyphemus) are important to determine egg production and to manage populations for the energetic needs of shorebirds that feed on horseshoe crab eggs. In 2003, over 17,500 horseshoe crabs were tagged and released throughout Delaware Bay, and recaptured crabs came from...
Accumulation of As, Cd and selected trace elements in tubers of Scirpus aritimus L. from Doñana marshes (South Spain)
P. Madejon, J.M. Murillo, T. Maranon, J. L. Espinar, F. Cabrera
2006, Chemosphere (64) 742-748
The collapse of a pyrite-mining, tailing dam on 1998 contaminated an area of 4286 ha along the Agrio and Guadiamar river valleys in southern Spain. Over 2700 ha of the Doñana marshes, an important wintering area for wetland European birds, were contaminated. This study reports analyses of the tubers of Scirpus maritimus...
Hurricanes, submarine groundwater discharge, and Florida's red tides
C. Hu, F. E. Muller-Karger, P.W. Swarzenski
2006, Geophysical Research Letters (33)
A Karenia brevis Harmful Algal Bloom affected coastal waters shallower than 50 m off west-central Florida from January 2005 through January 2006, showing a sustained anomaly of ???1 mg chlorophyll m-3 over an area of up to 67,500 km2. Red tides occur in the same area (approximately 26-29??N, 82-83??W) almost...
Effects of chronic avian malaria (Plasmodium relictum) infection on reproductive success of Hawaii Amakihi (Hemignathus virens)
A.M. Kilpatrick, D.A. Lapointe, C. T. Atkinson, B.L. Woodworth, J.K. Lease, M.E. Reiter, K. Gross
2006, The Auk (123) 764-774
We studied the effects of chronic avian malaria (Plasmodium relictum) infections on the reproductive success of a native Hawaiian honeycreeper, Hawaii Amakihi (Hemignathus virens). Chronic malaria infections in male and female parents did not significantly reduce reproductive success as measured by clutch size, hatching success, fledging mass, number of nestlings...
Use of Picard and Newton iteration for solving nonlinear ground water flow equations
S. Mehl
2006, Ground Water (44) 583-594
This study examines the use of Picard and Newton iteration to solve the nonlinear, saturated ground water flow equation. Here, a simple three-node problem is used to demonstrate the convergence difficulties that can arise when solving the nonlinear, saturated ground water flow equation in both homogeneous and heterogeneous systems with...
Current subsidence rates due to compaction of Holocene sediments in southern Louisiana
T.A. Meckel, Uri S. ten Brink, S.J. Williams
2006, Geophysical Research Letters (33)
Relative contributions of geologic and anthropogenic processes to subsidence of southern Louisiana are vigorously debated. Of these, shallow sediment compaction is often considered dominant, although this has never been directly observed or effectively demonstrated. Quantitative understanding of subsidence is important for predicting relative sea level rise, storm surge flooding due...
Flooding on California's Russian River: Role of atmospheric rivers
F.M. Ralph, P.J. Neiman, G.A. Wick, S.I. Gutman, M. D. Dettinger, D.R. Cayan, A.B. White
2006, Geophysical Research Letters (33)
Experimental observations collected during meteorological field studies conducted by the National Oceanic and Atmospheric Administration near the Russian River of coastal northern California are combined with SSM/I satellite observations offshore to examine the role of landfalling atmospheric rivers in the creation of flooding. While recent studies have documented the characteristics...
Use of buccal swabs for sampling DNA from nestling and adult birds
Colleen M. Handel, Lisa M. Pajot, Sandra L. Talbot, George K. Sage
2006, Wildlife Society Bulletin (34) 1094-1100
We evaluated the feasibility and efficiency of using swabs to collect buccal epithelial cells fromsmall (2‐ to 13‐g) birds as a source of DNA for genetic studies. We used commercially available buccal swab kits to collect samples from 42 adult and 39 nestling (4‐ to 8‐day‐old) black‐capped chickadees (Poecile atricapillus) and from6 4‐day‐old nestling boreal chickadees (P. hudsonica)....
Landscape conditions predisposing grizzly bears to conflicts on private agricultural lands in the western USA
S.M. Wilson, M.J. Madel, D.J. Mattson, J.M. Graham, T. Merrill
2006, Biological Conservation (130) 47-59
We used multiple logistic regression to model how different landscape conditions contributed to the probability of human-grizzly bear conflicts on private agricultural ranch lands. We used locations of livestock pastures, traditional livestock carcass disposal areas (boneyards), beehives, and wetland-riparian associated vegetation to model the locations of 178 reported human-grizzly bear...
Shallow stratigraphy and sedimentation history during high-frequency sea-level changes on the central California shelf
E. E. Grossman, S.L. Eittreim, M.E. Field, F. L. Wong
2006, Continental Shelf Research (26) 1217-1239
Analyses of high-resolution seismic-reflection data and sediment cores indicate that an extensive sediment deposit on the central California continental shelf is comprised of several late-Pleistocene to Holocene age facies. Offshore of the littoral zone, in water depths of 30-90 m, a 3-6 m thick veneer of fine sediment referred to...
