Co-precipitation of dissolved organic matter by calcium carbonate in Pyramid Lake, Nevada
Jerry A. Leenheer, Michael M. Reddy
2008, Annals of Environmental Science (2) 11-25
Our previous research has demonstrated that dissolved organic matter (DOM) influences calcium carbonate mineral formation in surface and ground water. To better understand DOM mediation of carbonate precipitation and DOM co-precipitation and/or incorporation with carbonate minerals, we characterized the content and speciation of DOM in carbonate minerals and in the...
Modeling landslide recurrence in Seattle, Washington, USA
Diana Salciarini, Jonathan W. Godt, William Z. Savage, Rex L. Baum, Pietro Conversini
2008, Engineering Geology (102) 227-237
To manage the hazard associated with shallow landslides, decision makers need an understanding of where and when landslides may occur. A variety of approaches have been used to estimate the hazard from shallow, rainfall-triggered landslides, such as empirical rainfall threshold methods or probabilistic methods based on historical records. The wide...
The National Map product and services directory
Mark R. Newell
2008, Fact Sheet 2008-3065
As one of the cornerstones of the U.S. Geological Survey's (USGS) National Geospatial Program (NGP), The National Map is a collaborative effort among the USGS and other Federal, state, and local partners to improve and deliver topographic information for the Nation. It has many uses ranging from recreation to scientific...
Delineation of landform and lithologic units for Ecological Landtype-Association analysis in Glacier Bay National Park, Southeast Alaska
David A. Brew
2008, Scientific Investigations Report 2008-5183
Landform and generalized bedrock lithologic units have been delineated for ecological landtype association analysis in Glacier Bay National Park in southeast Alaska (as the Park boundaries were defined before the 1971 Alaska National Interest Lands expansion). Related U.S. Forest Service efforts have covered (1) the whole region at coarse ecological- unit...
Responses in bird communities to wildland fires in southern California
Mark B. Mendelsohn, Cheryl S. Brehme, Carlton J. Rochester, Drew C. Stokes, Stacie A. Hathaway, Robert N. Fisher
2008, Fire Ecology (4) 63-82
There is a growing body of literature covering the responses of bird species to wildland fire events. Our study was unique among these because we investigated the effects of large-scale wildland fires on entire bird communities across multiple vegetation types. We conducted avian point counts during the breeding seasons for...
Reevaluation of mid-Pliocene North Atlantic sea surface temperatures
Marci M. Robinson, Harry J. Dowsett, Gary S. Dwyer, Kira T. Lawrence
2008, Paleoceanography (23)
Multiproxy temperature estimation requires careful attention to biological, chemical, physical, temporal, and calibration differences of each proxy and paleothermometry method. We evaluated mid-Pliocene sea surface temperature (SST) estimates from multiple proxies at Deep Sea Drilling Project Holes 552A, 609B, 607, and 606, transecting the North Atlantic Drift. SST estimates derived...
Radargrammetry on three planets
Randolph L. Kirk, Elpitha Howington-Kraus
Jun Chen, Jie Jiang, Shailesh Nayak, editor(s)
2008, Conference Paper, Proceedings: XXIst ISPRS Congress, Technical Commission IV
Synthetic Aperture Radar (SAR) can provide useful images in situations where passive optical imaging cannot, either because the microwaves used can penetrate atmospheric clouds, because active imaging can "see in the dark," or both. We have participated in the NASA Magellan mission to Venus in the 1990s and the current...
Environmental occurrence and shallow ground water detection of the antibiotic monensin from dairy farms
N. Watanabe, T.H. Harter, B.A. Bergamaschi
2008, Journal of Environmental Quality (37) S78-S85
Pharmaceuticals used in animal feeding operations have been detected in various environmental settings. There is a growing concern about the impact on terrestrial and aquatic organisms and the development of antibiotic-resistant strains of microorganisms. Pharmaceutical use in milking cows is relatively limited compared with other livestock operations, except for the...
Light-toned salty soils and co-existing Si-rich species discovered by the Mars Exploration Rover Spirit in Columbia Hills
Alian Wang, J.F. Bell III, Ron Li, J. R. Johnson, W. H. Farrand, E.A. Cloutis, R. E. Arvidson, L. Crumpler, S. W. Squyres, S. M. McLennan, Kenneth E. Herkenhoff, S. W. Ruff, A.T. Knudson, Wei Chen, R. Greenberger
2008, Journal of Geophysical Research (113) 1-35
Light-toned soils were exposed, through serendipitous excavations by Spirit Rover wheels, at eight locations in the Columbia Hills. Their occurrences were grouped into four types on the basis of geomorphic settings. At three major exposures, the light-toned soils are hydrous and sulfate-rich. The spatial distributions of distinct types of salty...
Ferguson rock slide buries California State Highway near Yosemite National Park
Edwin L. Harp, Mark E. Reid, Jonathan W. Godt, Jerome V. DeGraff, Alan J. Gallegos
2008, Landslides (5) 331-337
During spring 2006, talus from the toe area of a rock-block slide of about 800,000 m3 buried California State Highway 140, one of the main routes into heavily-visited Yosemite National Park, USA. Closure of the highway for 92 days caused business losses of about 4.8 million USD. The rock slide,...
Hydrologic connections and dynamics of water movement in the classical Karst (Kras) aquifer: Evidence from frequent chemical and stable isotope sampling
Daniel H. Doctor
2008, Acta Carsologica (37) 101-123
A review of past researchon the hydrogeology of the Classical Karst (Kras) region and new information obtained from a two-year study using environmental tracers are presented in this paper. The main problems addressed are 1) the sources of water to the Kras aquifer resurgence zone—including the famous Timavo springs—under changing...
Dual-Carbon sources fuel the OCS deep-reef Community, a stable isotope investigation
Kenneth J. Sulak, J. Berg, Michael T. Randall, George D. Dennis III, R. A. Brooks
2008, Proceedings of the 11th International Coral Reef Symposium, Ft. Lauderdale, Florida (2) 945-949
The hypothesis that phytoplankton is the sole carbon source for the OCS deep-reef community (>60 m) was tested. Trophic structure for NE Gulf of Mexico deep reefs was analyzed via carbon and nitrogen stable isotopes. Carbon signatures for 114 entities (carbon sources, sediment, fishes, and invertebrates) supported surface phytoplankton as...
Assessing contribution of DOC from sediments to a drinking-water reservoir using optical profiling
Bryan D. Downing, Brian A. Bergamaschi, David G. Evans, Emmanuel Boss
2008, Lake and Reservoir Management (24) 381-391
Understanding the sources of dissolved organic carbon (DOC) in drinking-water reservoirs is an important management issue because DOC may form disinfection by-products, interfere with disinfection, or increase treatment costs. DOC may be derived from a host of sources-algal production of DOC in the reservoir, marginal production of DOC from mucks...
Anatomy of a shoreface sand ridge revisted using foraminifera: False Cape Shoals, Virginia/North Carolina inner shelf
Marci M. Robinson, Randolph A. McBride
2008, Continental Shelf Research (17) 2428-2441
Certain details regarding the origin and evolution of shelf sand ridges remain elusive. Knowledge of their internal stratigraphy and microfossil distribution is necessary to define the origin and to determine the processes that modify sand ridges. Fourteen vibracores from False Cape Shoal A, a well-developed shoreface-attached sand ridge on the...
Conservation: saving Florida's manatees
Robert K. Bonde
2008, WetPixel Quarterly (4) 50-54
Robert K. Bonde of the U.S. Geological Survey writes about the protected population of manatees in Crystal River, Florida, including information about the threats they face as they migrate in and out of protected waters. Photographer Carol Grant shares images of "Angel," a newborn manatee she photographed early one winter...
Cartography for lunar exploration: 2008 status and mission plans
Randolph L. Kirk, Brent A. Archinal, Lisa R. Gaddis, Mark R. Rosiek
Jun Chen, Jie Jiang, Shailesh Nayak, editor(s)
2008, Conference Paper, Proceedings: XXIst ISPRS Congress, Technical Commission IV
The initial spacecraft exploration of the Moon in the 1960s-70s yielded extensive data, primarily in the form of film and television images, which were used to produce a large number of hardcopy maps by conventional techniques. A second era of exploration, beginning in the early 1990s, has produced digital data...
Initial fluvial response to the removal of Oregon's Marmot Dam
Jon J. Major, Kurt R. Spicer, Abagail Rhode, J. E. O’Connor, Heather M. Bragg, Dwight Q. Tanner, Chauncey W. Anderson, J. Rose Wallick, Gordon E. Grant
2008, Eos, Transactions, American Geophysical Union (89) 241-242
A temporary, 14‐meter‐high earthen cofferdam standing in place of Marmot Dam was breached on 19 October 2007, allowing the 80‐ kilometer‐long Sandy River to flow freely from Mount Hood, Oreg., to the Columbia River for the first time in nearly 100 years. Marmot Dam is one of the largest dams...
A 26 million year gap in the central Arctic record at the greenhouse-icehouse transition: Looking for clues
Francesca Sangiorgi, Hans-Juergen Brumsack, Debra A. Willard, Stefan Schouten, Catherine E. Stickley, Matthew O’Regan, Gert-Jan Reichart, Jaap S. Sinninghe Damste, Henk Brinkhuis
2008, Paleoceanography (23)
The Cenozoic record of the Lomonosov Ridge (central Arctic Ocean) recovered during Integrated Ocean Drilling Program (IODP) Expedition 302 revealed an unexpected 26 Ma hiatus, separating middle Eocene (∼44.4 Ma) from lower Miocene sediments (∼18.2 Ma). To elucidate the nature of this unconformity, we performed a multiproxy palynological (dinoflagellate cysts,...
Suspended-sediment and nutrient loads for Waiakea and Alenaio Streams, Hilo, Hawaii, 2003-2006
Todd K. Presley, Marcael T. J. Jamison, Dale C. Nishimoto
2008, Open-File Report 2007-1429
Suspended sediment and nutrient samples were collected during wet-weather conditions at three sites on two ephemeral streams in the vicinity of Hilo, Hawaii during March 2004 to March 2006. Two sites were sampled on Waiakea Stream at 80- and 860-foot altitudes during March 2004 to August 2005. One site was...
Tracing the first steps of American sturgeon pioneers in Europe
A. Ludwig, U. Arndt, S. Lippold, N. Benecke, L. Debus, T.L. King, S. Matsumura
2008, BMC Evolutionary Biology (8)
Background. A Baltic population of Atlantic sturgeon was founded ???1,200 years ago by migrants from North America, but after centuries of persistence, the population was extirpated in the 1960s, mainly as a result of over-harvest and habitat alterations. As there are four genetically distinct groups of Atlantic sturgeon inhabiting North...
Coupled semivariogram uncertainty of hydrogeological and geophysical data on capture zone uncertainty analysis
A. Rahman, F.T.-C. Tsai, C.D. White, C. S. Willson
2008, Journal of Hydrologic Engineering (13) 915-925
This study investigates capture zone uncertainty that relates to the coupled semivariogram uncertainty of hydrogeological and geophysical data. Semivariogram uncertainty is represented by the uncertainty in structural parameters (range, sill, and nugget). We used the beta distribution function to derive the prior distributions of structural parameters. The probability distributions of...
Vertical tectonic deformation associated with the San Andreas fault zone offshore of San Francisco, California
H. F. Ryan, T. Parsons, R. W. Sliter
2008, Tectonophysics (457) 209-223
A new fault map of the shelf offshore of San Francisco, California shows that faulting occurs as a distributed shear zone that involves many fault strands with the principal displacement taken up by the San Andreas fault and the eastern strand of the San Gregorio fault zone. Structures associated with...
A seepage meter designed for use in flowing water
D.O. Rosenberry
2008, Journal of Hydrology (359) 118-130
Seepage meters provide one of the most direct means to measure exchange of water across the sediment-water interface, but they generally have been unsuitable for use in fluvial settings. Although the seepage bag can be placed inside a rigid container to minimize velocity head concerns, the seepage cylinder installed in...
Estimated home ranges can misrepresent habitat relationships on patchy landscapes
M.S. Mitchell, R. A. Powell
2008, Ecological Modelling (216) 409-414
Home ranges of animals are generally structured by the selective use of resource-bearing patches that comprise habitat. Based on this concept, home ranges of animals estimated from location data are commonly used to infer habitat relationships. Because home ranges estimated from animal locations are largely continuous in space, the resource-bearing...
Ocean acidification and calcifying reef organisms: A mesocosm investigation
P. L. Jokiel, K. S. Rodgers, I. B. Kuffner, A.J. Andersson, E.F. Cox, F.T. MacKenzie
2008, Coral Reefs (27) 473-483
A long-term (10 months) controlled experiment was conducted to test the impact of increased partial pressure of carbon dioxide (pCO2) on common calcifying coral reef organisms. The experiment was conducted in replicate continuous flow coral reef mesocosms flushed with unfiltered sea water from Kaneohe Bay, Oahu, Hawaii. Mesocosms were located...
