Laboratory and field testing of commercial rotational seismometers
R.L. Nigbor, J.R. Evans, C. R. Hutt
2009, Bulletin of the Seismological Society of America (99) 1215-1227
There are a small number of commercially available sensors to measure rotational motion in the frequency and amplitude ranges appropriate for earthquake motions on the ground and in structures. However, the performance of these rotational seismometers has not been rigorously and independently tested and characterized for earthquake monitoring purposes as...
Biomineralization associated with microbial reduction of Fe3+ and oxidation of Fe2+ in solid minerals
G. Zhang, H. Dong, H. Jiang, R.K. Kukkadapu, J. Kim, D. Eberl, Z. Xu
2009, American Mineralogist (94) 1049-1058
Iron-reducing and oxidizing microorganisms gain energy through reduction or oxidation of iron, and by doing so play an important role in the geochemical cycling of iron. This study was undertaken to investigate mineral transformations associated with microbial reduction of Fe3+ and oxidation of Fe2+ in solid minerals. A fluid sample...
The effects of fire on avian communities: Spatio-temporal attributes of the literature 19122003
A. Leidolf, J.A. Bissonette
2009, International Journal of Wildland Fire (18) 609-622
We reviewed the temporal, geographic, and biogeographic distribution, as well as relevant research and publication attributes, of 512 documents addressing the effects of fire on avian communities, to provide an assessment of the scope of this literature and recommendations for future research. We summarized relevant attributes of all documents to...
Forecasting distributions of large federal-lands fires utilizing satellite and gridded weather information
H.K. Preisler, R.E. Burgan, J.C. Eidenshink, Jacqueline M. Klaver, R. W. Klaver
2009, International Journal of Wildland Fire (18) 508-516
The current study presents a statistical model for assessing the skill of fire danger indices and for forecasting the distribution of the expected numbers of large fires over a given region and for the upcoming week. The procedure permits development of daily maps that forecast, for the forthcoming week and...
Composition of the seed bank in drawdown areas of navigation pool 8 of the upper Mississippi river
K.P. Kenow, J.E. Lyon
2009, River Research and Applications (25) 194-207
In an effort to enhance aquatic plant production and habitat diversity on the Upper Mississippi River (UMR), resource managers considered water level reduction as a management tool to increase the area of emergent and submersed aquatic vegetation by natural seed germination. To quantify the availability of seed, we assessed the...
Recognizing former flood-tide deltas in the Holocene stratigraphic record from the Outer Banks, North Carolina, USA
Christopher G. Smith, S.J. Culver, D. J. Mallinson, S.R. Riggs, D.R. Corbett
2009, Stratigraphy (6) 61-78
Foraminiferal and sedimentologic data were collected by vibracoring a small, relict, short-lived, migrating inlet (New Inlet) and its flood-tide delta on the Outer Banks, North Carolina. These data, placed in the context of geospatial data derived from ground penetrating radar, were developed into a stratigraphic model for this sedimentary environment....
Historical fire and multidecadal drought as context for piñon - Juniper woodland restoration in western Colorado
Douglas J. Shinneman, William L. Baker
2009, Ecological Applications (19) 1231-1245
Fire is known to structure tree populations, but the role of broad-scale climate variability is less clear. For example, the influence of climatic “teleconnections” (the relationship between oceanic–atmospheric fluctuations and anomalous weather patterns across broad scales) on forest age structure is relatively unexplored. We sampled semiarid piñon–juniper (Pinus edulis–Juniperus osteosperma)...
Carbon cycle observations: Gaps threaten climate mitigation policies
R. Birdsey, N. Bates, M. Behrenfeld, K. Davis, S.C. Doney, R. Feely, D. Hansell, L. Heath, E. Kasischke, H. Kheshgi, B. Law, C. Lee, A. D. McGuire, P. Raymond, C.J. Tucker
2009, Eos, Transactions, American Geophysical Union (90) 292
[No abstract available]...
Red-throated loons (Gavia stellata) breeding in Alaska, USA, are exposed to PCBs while on their Asian wintering grounds
Joel A. Schmutz, K.A. Trust, A.C. Matz
2009, Environmental Pollution (157) 2386-2393
Red-throated loons (Gavia stellata) breeding in Alaska declined 53% during 1977-1993. We compare concentrations of environmental contaminants in red-throated loons among four nesting areas in Alaska and discuss potential ramifications of exposure on reproductive success and population trends. Eggs from the four areas had similar total polychlorinated biphenyl (PCB) concentrations,...
High precision relocation of earthquakes at Iliamna Volcano, Alaska
P. Statz-Boyer, C. Thurber, J.D. Pesicek, S. Prejean
2009, Journal of Volcanology and Geothermal Research (184) 323-332
In August 1996, a period of elevated seismicity commenced beneath Iliamna Volcano, Alaska. This activity lasted until early 1997, consisted of over 3000 earthquakes, and was accompanied by elevated emissions of volcanic gases. No eruption occurred and seismicity returned to background levels where it has remained since. We use waveform...
Geomorphology, stability and mobility of the Currituck slide
J. Locat, H. Lee, Uri S. ten Brink, D. Twichell, E. Geist, M. Sansoucy
2009, Marine Geology (264) 28-40
Over the last 100,000??years, the U.S. Atlantic continental margin has experienced various types of mass movements some of which are believed to have taken place at times of low sea level. At one of these times of low sea level a significant trigger caused a major submarine mass movement off...
Systemically applied insecticides for treatment of erythrina gall wasp, quadrastichus erythrinae kim hymenoptera: Eulophidae
J.J. Doccola, S.L. Smith, B.L. Strom, A.C. Medeiros, E. Von Allmen
2009, Arboriculture and Urban Forestry (35) 173-181
Abstract The erythrina gall wasp (EGW), believed native to Africa, is a recently described species and now serious invasive pest of Erythrina (coral trees) in tropical and subtropical locales. Erythrina are favored ornamental and landscape trees, as well as native members of threatened ecosystems. The EGW is a tiny, highly...
A spatial model to prioritize sagebrush landscapes in the intermountain west (U.S.A.) for restoration
C.W. Meinke, S.T. Knick, D.A. Pyke
2009, Restoration Ecology (17) 652-659
The ecological integrity of Sagebrush (Artemisia spp.) ecosystems in the Intermountain West (U.S.A.) has been diminished by synergistic relationships among human activities, spread of invasive plants, and altered disturbance regimes. An aggressive effort to restore Sagebrush habitats is necessary if we are to stabilize or improve current habitat trajectories and...
Claritas rise, Mars: Pre-Tharsis magmatism?
J. M. Dohm, R. C. Anderson, J.-P. Williams, J. Ruiz, P.C. McGuire, D.L. Buczkowski, R. Wang, L. Scharenbroich, T.M. Hare, J.E.P. Connerney, V.R. Baker, S.J. Wheelock, J.C. Ferris, H. Miyamoto
2009, Journal of Volcanology and Geothermal Research (185) 139-156
Claritas rise is a prominent ancient (Noachian) center of tectonism identified through investigation of comprehensive paleotectonic information of the western hemisphere of Mars. This center is interpreted to be the result of magmatic-driven activity, including uplift and associated tectonism, as well as possible hydrothermal activity. Coupled with its ancient stratigraphy,...
Fipronil and its degradates in indoor and outdoor dust
B.J. Mahler, P. C. Van Metre, J.T. Wilson, M. Musgrove, S.D. Zaugg, M.R. Burkhardt
2009, Environmental Science & Technology (43) 5665-5670
Fipronil is a potent insecticide used for control of termites, fleas, roaches, ants, and other pests. We measured fipronil, fipronil sulfide, and desulfinyl fipronil concentrations in indoor and outdoor dust from 24 residences in Austin, Texas. At least one of these three fipronil compounds was detected in every sample. Fipronil...
Quantifying ecological, morphological, and genetic variation to delimit species in the coast horned lizard species complex (Phrynosoma)
A.D. Leache, M.S. Koo, C.L. Spencer, T.J. Papenfuss, Robert N. Fisher, J.A. McGuire
2009, Proceedings of the National Academy of Sciences of the United States of America (106) 12418-12423
Lineage separation and divergence form a temporally extended process whereby populations may diverge genetically, morphologically, or ecologically, and these contingent properties of species provide the operational criteria necessary for species delimitation.We inferred the historical process of lineage formation in the coast horned lizard (Phrynosoma coronatum) species complex by evaluating a...
Provenance of Holocene sediment on the Chukchi-Alaskan margin based on combined diffuse spectral reflectance and quantitative X-Ray Diffraction analysis
J.D. Ortiz, L. Polyak, J.M. Grebmeier, D. Darby, D. D. Eberl, S. Naidu, D. Nof
2009, Global and Planetary Change (68) 73-84
Sediment clay and silt mineral assemblages provide an excellent means of assessing the provenance of fine-grained Arctic sediment especially when a unique mineral assemblage can be tied to specific source areas. The diffuse spectral reflectance (DSR) first derivative measurements and quantitative X-Ray Diffraction (qXRD) on a high-resolution sediment core from...
A simplified water temperature model for the Colorado River below Glen Canyon Dam
S.A. Wright, C.R. Anderson, N. Voichick
2009, River Research and Applications (25) 675-686
Glen Canyon Dam, located on the Colorado River in northern Arizona, has affected the physical, biological and cultural resources of the river downstream in Grand Canyon. One of the impacts to the downstream physical environment that has important implications for the aquatic ecosystem is the transformation of the thermal regime...
Gas chromatographic–mass spectrometric fragmentation study of phytoestrogens as their trimethylsilyl derivatives: Identification in soy milk and wastewater samples
Imma Ferrar, Larry B. Barber, E. Michael Thurman
2009, Journal of Chromatography A (1216) 6024-6032
An analytical method for the identification of eight plant phytoestrogens (biochanin A, coumestrol, daidzein, equol, formononetin, glycitein, genistein and prunetin) in soy products and wastewater samples was developed using gas chromatography coupled with ion trap mass spectrometry (GC/MS–MS). The phytoestrogens were derivatized as their trimethylsilyl ethers with trimethylchlorosilane (TMCS) and...
Gold and trace element zonation in pyrite using a laser imaging technique: Implications for the timing of gold in orogenic and carlin-style sediment-hosted deposits
R.R. Large, L. Danyushevsky, C. Hollit, V. Maslennikov, S. Meffre, S. Gilbert, S. Bull, R. Scott, P. Emsbo, H. Thomas, B. Singh, J. Foster
2009, Economic Geology (104) 635-668
Laser ablation ICP-MS imaging of gold and other trace elements in pyrite from four different sediment- hosted gold-arsenic deposits has revealed two distinct episodes of gold enrichment in each deposit: an early synsedimentary stage where invisible gold is concentrated in arsenian diagenetic pyrite along with other trace elements, in particular,...
Deer carcass decomposition and potential scavenger exposure to chronic wasting disease
C.S. Jennelle, M.D. Samuel, C.A. Nolden, E.A. Berkley
2009, Journal of Wildlife Management (73) 655-662
Chronic wasting disease (CWD) is a transmissible spongiform encephalopathy afflicting the Cervidae family in North America, causing neurodegeneration and ultimately death. Although there are no reports of natural cross-species transmission of CWD to noncervids, infected deer carcasses pose a potential risk of CWD exposure for other animals. We placed 40...
Processes active in mafic magma chambers: The example of Kilauea Iki Lava Lake, Hawaii
Rosalind Tuthill Helz
2009, LITHOS (111) 37-46
Kilauea Iki lava lake formed in 1959 as a closed chamber of 40 million m3 of picritic magma. Repeated drilling and sampling of the lake allows recognition of processes of magmatic differentiation, and places time restrictions on the periods when they operated. This paper focuses on evidence for the occurrence of lateral...
Database for earthquake strong motion studies in Italy
G. Scasserra, J.P. Stewart, R. E. Kayen, G. Lanzo
2009, Journal of Earthquake Engineering (13) 852-881
We describe an Italian database of strong ground motion recordings and databanks delineating conditions at the instrument sites and characteristics of the seismic sources. The strong motion database consists of 247 corrected recordings from 89 earthquakes and 101 recording stations. Uncorrected recordings were drawn from public web sites and processed...
Geomechanical response of permafrost-associated hydrate deposits to depressurization-induced gas production
J. Rutqvist, G. J. Moridis, T. Grover, T. Collett
2009, Journal of Petroleum Science and Engineering (67) 1-12
In this simulation study, we analyzed the geomechanical response during depressurization production from two known hydrate-bearing permafrost deposits: the Mallik (Northwest Territories, Canada) deposit and Mount Elbert (Alaska, USA) deposit. Gas was produced from these deposits at constant pressure using horizontal wells placed at the top of a hydrate layer...
Investigating the impact of surface wave breaking on modeling the trajectories of drifters in the northern Adriatic Sea during a wind-storm event
S. Carniel, J.C. Warner, J. Chiggiato, M. Sclavo
2009, Ocean Modelling (30) 225-239
An accurate numerical prediction of the oceanic upper layer velocity is a demanding requirement for many applications at sea and is a function of several near-surface processes that need to be incorporated in a numerical model. Among them, we assess the effects of vertical resolution, different vertical mixing parameterization (the...
