A review of the endemic Hawaiian Drosophilidae and their host plants
K.N. Magnacca, D. Foote, P. M. O’Grady
2008, Zootaxa 1-58
The Hawaiian Drosophilidae is one of the best examples of rapid speciation in nature. Nearly 1,000 species of endemic drosophilids have evolved in situ in Hawaii since a single colonist arrived over 25 million years ago. A number of mechanisms, including ecological adaptation, sexual selection, and geographic isolation, have been...
Utilizing geochemical, hydrologic, and boron isotopic data to assess the success of a salinity and selenium remediation project, Upper Colorado River Basin, Utah
D. L. Naftz, T.D. Bullen, Bernard J. Stolp, C.D. Wilkowske
2008, Science of the Total Environment (392) 1-11
Stream discharge and geochemical data were collected at two sites along lower Ashley Creek, Utah, from 1999 to 2003, to assess the success of a site specific salinity and Se remediation project. The remediation project involved the replacement of a leaking sewage lagoon system that was interacting with Mancos Shale...
Mercury and drought along the lower Carson River, Nevada: II. Snowy egret and black-crowned night-heron reproduction on Lahontan Reservoir, 1997-2006
Elwood F. Hill, Charles J. Henry, Robert A. Grove
2008, Ecotoxicology (17) 117-131
Mercury concentrations in the floodplain of the Carson River Basin in northwestern Nevada are some of the highest ever reported in a natural system. Thus, a portion of the basin including Lahontan Reservoir was placed on the U.S. Environmental Protection Agency’s Natural Priorities List for research and cleanup. Preliminary studies...
Cloned embryos from semen. Part 2: Intergeneric nuclear transfer of semen-derived eland (Taurotragus oryx) epithelial cells into bovine oocytes
L. Nel-Themaat, M.C. Gomez, C.E. Pope, M. Lopez, G. Wirtu, J.A. Jenkins, A. Cole, B.L. Dresser, K.R. Bondioli, R.A. Godke
2008, Cloning and Stem Cells (10) 161-172
The production of cloned offspring by nuclear transfer (NT) of semen-derived somatic cells holds considerable potential for the incorporation of novel genes into endangered species populations. Because oocytes from endangered species are scarce, domestic species oocytes are often used as cytoplasts for interspecies NT. In the present study, epithelial cells...
Distribution of tsunami interevent times
E.L. Geist, T. Parsons
2008, Geophysical Research Letters (35)
The distribution of tsunami interevent times is analyzed using global and site-specific (Hilo, Hawaii) tsunami catalogs. An empirical probability density distribution is determined by binning the observed interevent times during a period in which the observation rate is approximately constant. The empirical distributions for both catalogs exhibit non-Poissonian behavior in...
Determining an age for the Inararo Tuff eruption of Mt. Pinatubo, based on correlation with a distal ash layer in core MD97-2142, South China Sea
Y.-P. Ku, C.-H. Chen, C. G. Newhall, S.-R. Song, T.F. Yang, Y. Iizuka, J. McGeehin
2008, Quaternary International (178) 138-145
The largest known eruption of Mt. Pinatubo in the late Quaternary was the Inararo Tuff Formation (ITF) eruption, roughly estimated as five times larger than the 1991 eruption. The precise age of the ITF eruption has been uncertain. Here, a correlative of the ITF eruption, Layer D, is identified in...
Workshop summary: Physical properties of gas hydrate-bearing sediment
William F. Waite, J.C. Santamarina
2008, Fire in the Ice: NETL Methane Hydrate Newsletter (8) 18-18
A wide range of particle and pore scale phenomena, often coupled, determines the macro-scale response of gas-hydrate bearing sediment to changes in mechanical, thermal, or chemical conditions. Predicting this macro-scale response is critical for applications such as optimizing the production of methane from gas-hydrate deposits, or determining the role of...
Pit tag retention in small (205-370 mm) American eels, Anguilla rostrata
Jennifer L. Zimmerman, Stuart A. Welsh
2008, Proceedings of the West Virginia Academy of Science (79) 1-8
No abstract available....
Structures controlling geothermal circulation identified through gravity and magnetic transects, Surprise Valley, California, northwestern Great Basin
Jonathan M.G. Glen, Anne E. Egger, David A. Ponce
2008, GRC Transactions (32) 279-283
No abstract available....
The desperate dozen: Fishes on the brink
Stuart A. Welsh
2008, Report
IT IS NO SECRET THAT OUR NATIVE AQUATIC ANIMALS ARE IN DECLINE. There are currently 582 species of animals on the Federal list of endangered and threatened species, 268 of these (46%) are found in freshwater habitats. Of the amazing assemblage of 675 fishes found in southeastern waters, more than...
Mechanical and electromagnetic properties of northern Gulf of Mexico sediments with and without THF hydrates
J.Y. Lee, J.C. Santamarina, C. Ruppel
2008, Marine and Petroleum Geology (25) 884-895
Using an oedometer cell instrumented to measure the evolution of electromagnetic properties, small strain stiffness, and temperature, we conducted consolidation tests on sediments recovered during drilling in the northern Gulf of Mexico at the Atwater Valley and Keathley Canyon sites as part of the 2005 Chevron Joint Industry Project on...
Transport of water, carbon, and sediment through the Yukon River Basin
Timothy P. Brabets, Paul F. Schuster
2008, Fact Sheet 2008-3005
In 2001, the U.S. Geological Survey (USGS) began a water-quality study of the Yukon River. The Yukon River Basin (YRB), which encompasses 330,000 square miles in northwestern Canada and central Alaska (fig. 1), is one of the largest and most diverse ecosystems in North America. The Yukon River is more...
Investigating gas hydrate as a factor in accretionary margin frontal ridge slope failures and cold seep biogeochemistry
R. Enkin, L. Esteban, R. Haacke, T.S. Hamilton, M. Hogg, L. Lapham, G. Middleton, P. Neelands, John W. Pohlman, M Riedel, K. Rose, A. Schlesinger, G. Standen, A. Stephenson, S. Taylor, W. Waite, X. Wang
2008, Fire in the Ice: NETL Methane Hydrate Newsletter (8) 9-12
During August 2008, a research expedition (2008-007-PGC) was carried out offshore Vancouver Island on the northern Cascadia Margin (Figure 1) to study the role of gas hydrate in slope stability and cold seep biogeochemistry. The cruise was organized by the Geological Survey of Canada (GSC) as part of the Earth...
Alaska's Pavlof volcano ends 11-year repose
Christopher F. Waythomas, Stephanie Prejean, Stephen R. McNutt
2008, Eos, Transactions, American Geophysical Union (89) 209-211
After an 11‐year period of repose, Pavlof volcano on the Alaska Peninsula (Figure 1) began an episode of Strombolian eruption lasting 31 days, from 14 August to 13 September 2007.The eruption began abruptly on 14 August after a minor increase in seismicity the previous day. Nearly continuous lava fountaining, explosions,...
Nesting biology of Lesser Canada Geese, Branta canadensis parvipes, along the Tanana River, Alaska
Craig R. Ely, John M. Pearce, Roger W. Ruess
2008, Canadian Field-Naturalist (122) 29-33
Lesser Canada Geese (Branta canadensis parvipes) are widespread throughout interior regions of Alaska and Canada, yet there have been no published studies documenting basic aspects of their nesting biology. We conducted a study to determine reproductive parameters of Lesser Canada Geese nesting along the Tanana River near the city of...
Protracted construction of gabbroic crust at a slow spreading ridge: Constraints from 206Pb/238U zircon ages from Atlantis Massif and IODP Hole U1309D (30°N, MAR)
Craig B. Grimes, Barbara E. John, Michael J. Cheadle, Joseph L. Wooden
2008, Geochemistry, Geophysics, Geosystems (9)
Sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon ages of 24 samples from oceanic crust recovered in Integrated Ocean Drilling Program (IODP) Hole U1309D and from the surface of Atlantis Massif, Mid-Atlantic Ridge (MAR) (30°N) document a protracted history of accretion in the footwall to an oceanic detachment fault. Ages for...
Devonian brachiopods of southwesternmost laurentia: Biogeographic affinities and tectonic significance
A. J. Boucot, Forrest G. Poole, R. Amaya-Martinez, A. G. Harris, Charles Sandberg, William R. Page
2008, Special Paper of the Geological Society of America 77-97
Three brachiopod faunas discussed herein record different depositional and tectonic settings along the southwestern margin of Laurentia (North America) during Devonian time. Depositional settings include inner continental shelf (Cerros de Los Murcielagos), medial continental shelf (Rancho Placeritos), and offshelf continental rise (Rancho Los Chinos). Ages of Devonian brachiopod faunas include...
Sensitivity of wetland saturated hydraulic heads and water budgets to evapotranspiration
W.B. Shoemaker, S. Huddleston, C.L. Boudreau, A. M. O’Reilly
2008, Wetlands (28) 1040-1047
The sensitivity of wetland saturated hydraulic heads and water budgets to evapotranspiration (ET) was examined using a simplified hydrologic model and eight representations of ET. Estimates of ET that created the most reliable wetland saturated hydraulic heads and water budgets employed vegetation coefficients to correct potential ET, calculated by the...
Birds of the US-Mexico borderlands: Distribution, ecology and conservation
Janet M. Ruth, Tim Brush, David J. Krueper, editor(s)
2008, Studies in Avian Biology (37)
The concept for this volume began as a scientifi c symposium at the North American Ornithological Conference (NAOC) in Veracruz, Mexico in October 2006. The symposium was entitled “Avian Distributional Change, Anthropogenic Challenges, and Recent Avian Research and Technological Advances within the US–Mexico Border Region,” and was cochaired by two...
A mantle plume beneath California? The mid-Miocene Lovejoy Flood Basalt, northern California
N.J. Garrison, C.J. Busby, P. B. Gans, K. Putirka, D.L. Wagner
2008, Special Paper of the Geological Society of America 551-572
The Lovejoy basalt represents the largest eruptive unit identified in California, and its age, volume, and chemistry indicate a genetic affinity with the Columbia River Basalt Group and its associated mantle-plume activity. Recent field mapping, geochemical analyses, and radiometric dating suggest that the Lovejoy basalt erupted during the mid-Miocene from...
Silurian Gastropoda from the Alexander terrane, southeast Alaska
D.M. Rohr, R. B. Blodgett
2008, Special Paper of the Geological Society of America 51-61
Gastropods are described from Ludlow-age strata of the Heceta Limestone on Prince of Wales Island, southeast Alaska. They are part of a diverse megabenthic fauna of the Alexander terrane, an accreted terrane of Siberian or Uralian affinities. Heceta Limestone gastropods with Uralian affinities include Kirkospira glacialis, which closely resembles "Pleurotomaria"...
Reducing sedimentation of depressional wetlands in agricultural landscapes
S. K. Skagen, Cynthia Melcher, D.A. Haukos
2008, Wetlands (28) 594-604
Depressional wetlands in agricultural landscapes are easily degraded by sediments and contaminants accumulated from their watersheds. Several best management practices can reduce transport of sediments into wetlands, including the establishment of vegetative buffers. We summarize the sources, transport dynamics, and effect of sediments, nutrients, and contaminants that threaten wetlands and...
Auditory monitoring of anuran populations: Chapter 16
Michael E Dorcas, Steven J. Price, Susan C. Walls, William J. Barichivich
2008, Book chapter, Amphibian ecology and conservation: A handbook of techniques
No abstract available....
Decreased abundance of crustose coralline algae due to ocean acidification
Ilsa B. Kuffner, Andreas J Andersson, Paul L. Jokiel, Ku'ulei S. Rodgers, Fred T. Mackenzie
2008, Nature Geoscience (1) 114-117
Owing to anthropogenic emissions, atmospheric concentrations of carbon dioxide could almost double between 2006 and 2100 according to business-as-usual carbon dioxide emission scenarios1. Because the ocean absorbs carbon dioxide from the atmosphere2, 3, 4, increasing atmospheric carbon dioxide concentrations will lead to increasing dissolved inorganic carbon and carbon...
Documentation of a Gulf sturgeon spawning site on the Yellow River, Alabama, USA
Brian R. Kreiser, J. Berg, M. Randall, F. Parauka, S. Floyd, B. Young, Kenneth J. Sulak
2008, Gulf and Caribbean Research (20) 91-95
The Gulf Sturgeon Recovery Plan (USFWS, GSMFC and NMFS 1995) stressed the need to provide maximum protection to Gulf sturgeon spawning habitat. The approach employed by various Gulf sturgeon researchers, including ourselves, to document spawning has been to identify potential spawning habitat on the basis of physical characteristics and/or tracking...
