Molecular and structural characterization of dissolved organic matter from the deep ocean by FTICR-MS, including hydrophilic nitrogenous organic molecules
T. Reemtsma, A. These, M. Linscheid, J. Leenheer, A. Spitzy
2008, Environmental Science & Technology (42) 1430-1437
Dissolved organic matter isolated from the deep Atlantic Ocean and fractionated into a so-called hydrophobic (HPO) fraction and a very hydrophilic (HPI) fraction was analyzed for the first time by Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) to resolve the molecular species, to determine their exact masses, and to...
Boulder Creek: A stream ecosystem in an urban landscape
Philip L. Verplanck, Sheila F. Murphy, Peter W. Birkeland, Pitlick John, Larry B. Barber, Travis S. Schmidt
Robert G.H. Raynolds, editor(s)
2008, Book chapter, Roaming the Rocky Mountains and environs: Geological field trips
The Boulder Creek Watershed, within the Front Range region of Colorado, is typical of many western watersheds because it is composed of a high-gradient upper reach mostly fed by snowmelt, a substantial change in gradient at the range front, and an urban corridor within the lower gradient section. A stream...
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,...
Age, distribution, and formation of late cenozoic paleovalleys of the lower Colorado River and their relation to river aggradation and degradation
K. A. Howard, S.C. Lundstrom, D.V. Malmon, S.J. Hook
2008, Conference Paper, Special Paper of the Geological Society of America
Distinctive far-traveled fluvial sediment of the lower Colorado River fills 20 paleo-valleys now stranded by the river downstream of Grand Canyon as it crosses the Basin and Range Province. These sediments resulted from two or more aggradational epi sodes in Pliocene and Pleistocene times following initial incision during the early...
The importance of hydrology in restoration of bottomland hardwood wetland functions
R.G. Hunter, S.P. Faulkner, K.A. Gibson
2008, Wetlands (28) 605-615
Bottomland hardwood (BLH) forests have important biogeochemical functions and it is well known that certain structural components, including pulsed hydrology, hydric soils, and hydrophytic vegetation, enhance these functions. It is unclear, however, how functions of restored BLH wetlands compare to mature, undisturbed wetlands. We measured a suite of structural and...
Dike orientations in the late jurassic independence dike swarm and implications for vertical-axis tectonic rotations in eastern California
R.F. Hopson, John W. Hillhouse, K. A. Howard
2008, Special Paper of the Geological Society of America 481-498
Analysis of the strikes of 3841 dikes in 47 domains in the 500-km-long Late Jurassic Independence dike swarm indicates a distribution that is skewed clockwise from the dominant northwest strike. Independence dike swarm azimuths tend to cluster near 325?? ?? 30??, consistent with initial subparallel intrusion along much of the...
It's the land use not the fuels: fires and land development in southern California
Stephanie Pincetl, Philip W. Rundel, Julie Clark De Blasio, Dan Silver, Tom Scott, Jon E. Keeley, Richard W. Halsey
2008, Real Estate Review (37) 25-42
No abstract available....
An evaluation of the evolution of the latest miocene to earliest pliocene bouse lake system in the lower Colorado river valley, southwestern USA
J.E. Spencer, P. A. Pearthree, P.K. House
2008, Conference Paper, Special Paper of the Geological Society of America
The upper Miocene to lower Pliocene Bouse Formation in the lower Colorado River trough of the American Southwest was deposited in three basins - from north to south, the Mohave, Havasu, and Blythe Basins - that were formed by extensional fault ing in the early to middle Miocene. Fossils of...
Diet and foraging of Rana sauteri and Bufo bankorensis tadpoles in subtropical Taiwanese streams
Hong-Chuan Chen, Bo-Chi Lai, Gary M. Fellers, Wei-Lung Wang, Yeong-Choy Kam
2008, Zoological Studies (47) 685-696
No abstract available....
Holocene vertical displacement on the central segments of the Wasatch fault zone, Utah
C. B. DuRoss
2008, Bulletin of the Seismological Society of America (98) 2918-2933
Compiled per-event vertical-displacement observations from 17 paleoseismic sites along the six central segments of the Wasatch fault zone (WFZ) highlight possible biases and trends in displacement along the fault. The displacement data are consistent with a model of characteristic-type slip, but anomalous and variable displacements indicate that significant natural variability...
Deformation of the Augustine Volcano, Alaska, 1992-2005, measured by ERS and ENVISAT SAR interferometry
Chang-Wook Lee, Zhong Lu, Oh-Ig Kwoun, Joong-Sun Won
2008, Earth, Planets and Space (60) 447-452
The Augustine Volcano is a conical-shaped, active stratovolcano located on an island of the same name in Cook Inlet, about 290 km southwest of Anchorage, Alaska. Augustine has experienced seven significant explosive eruptions - in 1812, 1883, 1908, 1935, 1963, 1976, 1986, and in January 2006. To measure the ground...
Advances in quantitative elemental analyses by laser ablation ICP-MS
A.E. Koenig
2008, Conference Paper, Microscopy and Microanalysis
[No abstract available]...
A simulation/optimization model for groundwater resources management in the Afram Plains area, Ghana
S.M. Yidana
2008, Journal of Environmental Hydrology (16) 1-14
A groundwater flow simulation model was developed using available hydrogeo logical data to A groundwater flow simulation model was developed using available hydrogeological data to describe groundwater flow in the Afram Plains area. A nonlinear optimization model was then developed and solved for the management of groundwater resources to meet...
Laser ablation ICP-MS in geochemistry and biogeochemistry: A progress report
W.I. Ridley, A.E. Koenig, M.J. Pribil
2008, Conference Paper, Microscopy and Microanalysis
[No abstract available]...
Late pleistocene aggradation and degradation of the lower colorado river: Perspectives from the Cottonwood area and other reconnaissance below Boulder Canyon
S.C. Lundstrom, S. A. Mahan, J.B. Paces, M.R. Hudson, P.K. House, D.V. Malmon, J.L. Blair, K. A. Howard
2008, Conference Paper, Special Paper of the Geological Society of America
Where the lower Colorado River traverses the Basin and Range Province below the Grand Canyon, significant late Pleistocene aggradation and subsequent degrada tion of the river are indicated by luminescence, paleomagnetic, and U-series data and stratigraphy. Aggradational, finely bedded reddish mud, clay, and silt are underlain and overlain by cross-bedded...
Late Neogene marine incursions and the ancestral Gulf of California
K. McDougall
2008, Conference Paper, Special Paper of the Geological Society of America
The late Neogene section in the Salton Trough, California, and along the lower Colorado River in Arizona is composed of marine units bracketed by nonmarine units. Microfossils from the marine deposits indicate that a marine incursion inundated the Salton Trough during the late Miocene. Water depths increased rapidly in the...
Geology of Hawaii reefs
Charles H. Fletcher, Christopher Bochicchio, Christopher L. Conger, Mary S. Engels, Eden J. Feirstein, Neil Frazer, Craig R. Glenn, Richard W. Grigg, Eric E. Grossman, Jodi N. Harney, Ebitari Isoun, Colin V. Murray-Wallace, John J. Rooney, Kenneth H. Rubin, Clark Sherman, Sean Vitousek
2008, Book chapter, Coral reefs of the USA
The Hawaii hot spot lies in the mantle under, or just to the south of, the Big Island of Hawaii. Two active subaerial volcanoes and one active submarine volcano reveal its productivity. Centrally located on the Pacific Plate, the hot spot is the source of the Hawaii Island Archipelago...
Reconstructing late Pliocene to middle Pleistocene Death Valley lakes and river systems as a test of pupfish (Cyprinodontidae) dispersal hypotheses
J.R. Knott, M. N. Machette, R.E. Klinger, A.M. Sarna-Wojcicki, J. C. Liddicoat, J. C. Tinsley III, B.T. David, V.M. Ebbs
2008, Conference Paper, Special Paper of the Geological Society of America
During glacial (pluvial) climatic periods, Death Valley is hypothesized to have episodically been the terminus for the Amargosa, Owens, and Mojave Rivers. Geological and biological studies have tended to support this hypothesis and a hydrological link that included the Colorado River, allowing dispersal of pupfish throughout southeastern California and western...
Age-class structure and variability of two populations of the bluemask darter etheostoma (Doration) sp.
J.W. Simmons, James B. Layzer, D.D. Smith
2008, American Midland Naturalist (160) 300-309
The bluemask darter Etheostoma (Doration) sp. is an endangered fish endemic to the upper Caney Fork system in the Cumberland River drainage in central Tennessee. Darters (Etheostoma spp.) are typically short-lived and exhibit rapid growth that quickly decreases with age. Consequently, estimating age of darters from length-frequency distributions can be...
Phylum Nematoda
A. Choudhury, Rebecca A. Cole
J. Eiras, Helmut E. Segner, Thomas Wahli, editor(s)
2008, Book chapter, Fish Diseases
No abstract available....
Emergence of functional responses from interactions of individuals
Donald L. DeAngelis, Shu Ju, J. Nathaniel Holland
2008, Verhandlungen der Internationalen Vereinigung fur Theoretische und Angewandte Limnologie (30) 272-274
No abstract available....
Timing and patterns of basin infilling as documented in Lake Powell during a drought
Lincoln F. Pratson, John Hughes-Clarke, Mark Anderson, Thomas Gerber, David C. Twitchell, Ronald Ferrari, Charles A. Nittrouer, Jonathan D. Beaudoin, Jesse Granet, John Crockett
2008, Geology (36) 843-846
Between 1999 and 2005, drought in the western United States led to a >44 m fall in the level of Lake Powell (Arizona-Utah), the nation's second-largest reservoir. River discharges to the reservoir were halved, yet the rivers still incised the tops of deltas left exposed along the rim of the...
A Key to the Pupal Exuviae of the Midges (Diptera: Chironomidae) of Everglades National Park, Florida
Robert E. Jacobsen
2008, Scientific Investigations Report 2008-5082
A key has been developed for identifying the pupal exuviae of 132 taxa of chironomid midges collected in Everglades National Park, as well as 18 additional species from freshwater habitats adjacent to the Park. Descriptions and illustrations are based upon voucher specimens from extensive collections of chironomid pupal exuviae for...
Upper conduit structure and explosion dynamics at Stromboli
Bernard A. Chouet, Phillip B. Dawson, Marcello Martini
Sonia Calvari, Salvatore Inguaggiato, Giuseppe Puglisi, Maurizio Ripepe, Mauro Rosi, editor(s)
2008, Book chapter, The Stromboli volcano: An integrated study of the 2002-2003 eruption
Modeling of very long period seismic data recorded during explosive activity at Stromboli in 1997 provides an image of the uppermost 1 km of its volcanic plumbing system. Two distinct dike-like conduit structures are identified, each representative of explosive eruptions from two different vents located near the northern and southern...
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...
