Fluvial fluxes of water, suspended particulate matter, and nutrients and potential impacts on tropical coastal water Biogeochemistry: Oahu, Hawai'i
D.J. Hoover, F.T. MacKenzie
2009, Aquatic Geochemistry (15) 547-570
Baseflow and storm runoff fluxes of water, suspended particulate matter (SPM), and nutrients (N and P) were assessed in conservation, urban, and agricultural streams discharging to coastal waters around the tropical island of Oahu, Hawai'i. Despite unusually low storm frequency and intensity during the study, storms accounted for 8-77% (median...
Exploration of Victoria crater by the mars rover opportunity
S. W. Squyres, A.H. Knoll, R. E. Arvidson, James W. Ashley, J.F. Bell III, W. M. Calvin, P. R. Christensen, B. C. Clark, B. A. Cohen, P.A. De Souza Jr., L. Edgar, W. H. Farrand, I. Fleischer, Ralf Gellert, M.P. Golombek, J. Grant, J. Grotzinger, A. Hayes, K. E. Herkenhoff, J. R. Johnson, B. Jolliff, G. Klingelhofer, A. Knudson, R. Li, T.J. McCoy, S. M. McLennan, D. W. Ming, D. W. Mittlefehldt, R.V. Morris, J. W. Rice Jr., C. Schroder, R.J. Sullivan, A. Yen, R.A. Yingst
2009, Science (324) 1058-1061
The Mars rover Opportunity has explored Victoria crater, a ???750-meter eroded impact crater formed in sulfate-rich sedimentary rocks. Impact-related stratigraphy is preserved in the crater walls, and meteoritic debris is present near the crater rim. The size of hematite-rich concretions decreases up-section, documenting variation in the intensity of groundwater processes....
Instrumental record of debris flow initiation during natural rainfall: Implications for modeling slope stability
D. R. Montgomery, K. M. Schmidt, W. E. Dietrich, J. McKean
2009, Journal of Geophysical Research F: Earth Surface (114)
The middle of a hillslope hollow in the Oregon Coast Range failed and mobilized as a debris flow during heavy rainfall in November 1996. Automated pressure transducers recorded high spatial variability of pore water pressure within the area that mobilized as a debris flow, which initiated...
Many monstrous Missoula floods down channeled scabland and Columbia Valley, Washington
Richard B. Waitt, Roger P. Denlinger, Jim O’Connor
Jim O’Connor, Ian Madin, Rebecca Dorsey, editor(s)
2009, Book chapter, Volcanoes to vineyards: geologic field trips through the dynamic landscape of the Pacific Northwest
The late Wisconsin Missoula floods are Earth's largest known discharges of fresh water. They carved Washington's Channeled Scabland--made famous by J H. Bretz's writings in the 1920s to 1950s--and deposited sporadic huge gravel bars in the Scab-lands and Columbia valley. Since the late 1970s the great floods have been shown...
The response of hydrophobic organics and potential toxicity in streams to urbanization of watersheds in six metropolitan areas of the United States
Wade L. Bryant Jr., S. Goodbred
2009, Environmental Monitoring and Assessment (157)
Semipermeable membrane devices (SPMDs) were deployed in streams along a gradient of urban land-use intensity in and around six metropolitan areas: Atlanta, Georgia; Raleigh–Durham, North Carolina; and Denver–Fort Collins, Colorado, in 2003; and Dallas–Fort Worth, Texas; Milwaukee–Green Bay, Wisconsin; and Portland, Oregon, in 2004 to examine relations between percent urban...
Social, political, and institutional setting: Water management problems of the Rio Grande
A. J. Douglas
2009, Journal of Water Resources Planning and Management (135) 493-501
This paper discusses various water management issues facing federal, state, and local agencies charged with managing the water resources of the Rio Grande River Basin and its major tributaries. The Rio Grande - 3,058 km (=1,900 mi) long - is the fourth longest river in the United States. The river's...
The Asian clam Corbicula fluminea as a biomonitor of trace element contamination: Accounting for different sources of variation using an hierarchical linear model
W. A. Shoults-Wilson, J.T. Peterson, J. M. Unrine, J. Rickard, M.C. Black
2009, Environmental Toxicology and Chemistry (28) 2224-2232
In the present study, specimens of the invasive clam, Corbicula fluminea, were collected above and below possible sources of potentially toxic trace elements (As, Cd, Cr, Cu, Hg, Pb, and Zn) in the Altamaha River system (Georgia, USA). Bioaccumulation of these elements was quantified, along with environmental (water and sediment)...
Elevated naturally occurring arsenic in a semiarid oxidizing system, Southern High Plains aquifer, Texas, USA
Bridget R. Scanlon, J.-P. Nicot, R.C. Reedy, D. Kurtzman, A. Mukherjee, D. Kirk Nordstrom
2009, Applied Geochemistry (24) 2061-2071
High groundwater As concentrations in oxidizing systems are generally associated with As adsorption onto hydrous metal (Al, Fe or Mn) oxides and mobilization with increased pH. The objective of this study was to evaluate the distribution, sources and mobilization mechanisms of As in the Southern High Plains (SHP) aquifer, Texas,...
Use of morphometric measurements to differentiate between species and sex of king and clapper rails
Marie Perkins, S.L. King, S.E. Travis, J. Linscombe
2009, Waterbirds (32) 579-584
King Rails (Rallus elegans) and Clapper Rails (Rallus longirostris) are large, secretive waterbirds whose ranges overlap in brackish marshes along the Atlantic and Gulf Coasts. King and Clapper Rails are difficult to separate by physical appearance and there is currently no reliable method to distinguish between the two species. Here,...
Incorporating both physical and kinetic limitations in quantifying dissolved oxygen flux to aquatic sediments
B.L. O’Connor, Miki Hondzo, J. W. Harvey
2009, Journal of Environmental Engineering (135) 1304-1314
Traditionally, dissolved oxygen (DO) fluxes have been calculated using the thin-film theory with DO microstructure data in systems characterized by fine sediments and low velocities. However, recent experimental evidence of fluctuating DO concentrations near the sediment-water interface suggests that turbulence and coherent motions control the mass transfer, and the surface...
Sediment yield from the tectonically active semiarid Western Transverse Ranges of California
J.A. Warrick, L.A.K. Mertes
2009, Geological Society of America Bulletin (121) 1054-1070
Sediment yields from the world's rivers are generally highest from steep drainage basins with weak lithology, active tectonics, or severe land-use impacts. Here, we evaluate sediment yields from the Western Transverse Ranges of California in an attempt to explain why they are two- to tenfold greater than the surrounding areas...
A robust, multisite Holocene history of drift ice off northern Iceland: Implications for North Atlantic climate
John T. Andrews, D. Darby, D. Eberle, A. E. Jennings, M. Moros, A. Ogilvie
2009, Holocene (19) 71-77
An important indicator of Holocene climate change is provided by evidence for variations in the extent of drift ice. A proxy for drift ice in Iceland waters is provided by the presence of quartz. Quantitative x-ray diffraction analysis of the < 2 mm sediment fraction was undertaken on 16 cores...
Effects of urbanization on stream water quality in the city of Atlanta, Georgia, USA
N.E. Peters
2009, Hydrological Processes (23) 2860-2878
A long-term stream water quality monitoring network was established in the city of Atlanta, Georgia during 2003 to assess baseline water quality conditions and the effects of urbanization on stream water quality. Routine hydrologically based manual stream sampling, including several concurrent manual point and equal width increment sampling, was conducted...
Expansion of Dreissena into offshore waters of Lake Michigan and potential impacts on fish populations
D.B. Bunnell, C.P. Madenjian, J.D. Holuszko, J.V. Adams, J. R. P. French III
2009, Journal of Great Lakes Research (35) 74-80
Lake Michigan was invaded by zebra mussels (Dreissena polymorpha) in the late 1980s and then followed by quagga mussels (D. bugensis) around 1997. Through 2000, both species (herein Dreissena) were largely restricted to depths less than 50??m. Herein, we provide results of an annual lake-wide bottom trawl survey in Lake...
Diets of aquatic birds reflect changes in the Lake Huron ecosystem
Craig E. Hebert, D.V. Chip Weseloh, Abode Idrissi, Michael T. Arts, Edward F. Roseman
2009, Aquatic Ecosystem Health & Management (12) 37-44
Human activities have affected the Lake Huron ecosystem, in part, through alterations in the structure and function of its food webs. Insights into the nature of food web change and its ecological ramifications can be obtained through the monitoring of high trophic level predators such as aquatic birds. Often, food...
Gene and antigen markers of Shiga-toxin producing E. coli from Michigan and Indiana river water: Occurrence and relation to recreational water quality criteria
J.W. Duris, S.K. Haack, L.R. Fogarty
2009, Journal of Environmental Quality (38) 1878-1886
The relation of bacterial pathogen occurrence to fecal indicator bacteria (FIB) concentrations used for recreational water quality criteria (RWQC) is poorly understood. This study determined the occurrence of Shiga-toxin producing Escherichia coli (STEC) markers and their relation to FIB concentrations in Michigan and Indiana river water. Using 67 fecal coliform (FC) bacteria...
Toxicity of sediment cores collected from the Ashtabula River in northeastern Ohio, USA, to the amphipod Hyalella azteca
C.G. Ingersoll, N.E. Kemble, J.L. Kunz, W. G. Brumbaugh, D.D. MacDonald, D. Smorong
2009, Archives of Environmental Contamination and Toxicology (57) 315-329
This study was conducted to support a Natural Resource Damage Assessment and Restoration project associated with the Ashtabula River in Ohio. The objective of the study was to evaluate the chemistry and toxicity of 50 sediment samples obtained from five cores collected from the Ashtabula River (10 samples/core, with each...
Standardizing electrofishing power for boat electrofishing: chapter 14
L.E. Miranda
Scott A. Bonar, Wayne A. Hubert, David W. Willis, editor(s)
2009, Book chapter, Standard methods for sampling North American freshwater fishes
Standardization of electrofishing can help reduced the variability of survey data and potentially reduce injur of fish. Without standardization, differences among collections can be partially attributed to disparities in electrofishing methodology, intensity of the electrical field, and size of the electrical field rather than to disparities in fish abundance, population...
Morphologic and transport properties of natural organic floc
Laurel G. Larsen, Judson W. Harvey, John P. Crimaldi
2009, Water Resources Research (45)
The morphology, entrainment, and settling of suspended aggregates (“floc”) significantly impact fluxes of organic carbon, nutrients, and contaminants in aquatic environments. However, transport properties of highly organic floc remain poorly understood. In this study detrital floc was collected in the Florida Everglades from two sites with different abundances of periphyton...
Concentration-discharge relationships reflect chemostatic characteristics of US catchments
S.E. Godsey, J.W. Kirchner, D. W. Clow
2009, Hydrological Processes (23) 1844-1864
Concentration-discharge relationships have been widely used as clues to the hydrochemical processes that control runoff chemistry. Here we examine concentration-discharge relationships for solutes produced primarily by mineral weathering in 59 geochemically diverse US catchments. We show that these catchments exhibit nearly chemostatic behaviour; their stream concentrations of weathering products such...
Review of fish diversity in the Lake Huron basin
E.F. Roseman, J.S. Schaeffer, P.J. Steen
2009, Conference Paper, Aquatic Ecosystem Health and Management
Lake Huron has a rich aquatic habitat diversity that includes shallow embayments, numerous tributaries, shallow mid-lake reef complexes, archipelagos, and profundal regions. These habitats provide support for warm, cool, and cold water fish communities. Diversity of fishes in Lake Huron reflects post-glaciation colonization events, current climate conditions, accidental and intentional...
Murres, capelin and ocean climate: Inter-annual associations across a decadal shift
P.M. Regular, F. Shuhood, T. Power, W.A. Montevecchi, G.J. Robertson, D. Ballam, John F. Piatt, B. Nakashima
2009, Environmental Monitoring and Assessment (156) 293-302
To ensure energy demands for reproduction are met, it is essential that marine birds breed during periods of peak food availability. We examined associations of the breeding chronology of common murres (Uria aalge) with the timing of the inshore arrival of their primary prey, capelin (Mallotus villosus) from 1980 to...
Not all water becomes wine: Sulfur inputs as an opportune tracer of hydrochemical losses from vineyards
Eve-Lyn S. Hinckley, Carol Kendall, Keith Loague
2009, Water Resources Research (45)
California's widespread and economically important vineyards offer substantial opportunities to understand the interface between hydrology and biogeochemistry in agricultural soils. The common use of native sulfur (S) as a fumigant or soil additive provides a novel way to isotopically differentiate among sulfate (SO42−) pools, allowing the estimation of water and...
Impact of sampling strategy on stream load estimates in till landscape of the Midwest
P. Vidon, L.E. Hubbard, E. Soyeux
2009, Environmental Monitoring and Assessment (159) 367-379
Accurately estimating various solute loads in streams during storms is critical to accurately determine maximum daily loads for regulatory purposes. This study investigates the impact of sampling strategy on solute load estimates in streams in the US Midwest. Three different solute types (nitrate, magnesium, and dissolved organic carbon (DOC)) and...
Martian mud volcanism: Terrestrial analogs and implications for formational scenarios
James A. Skinner, A. Mazzini
2009, Marine and Petroleum Geology (26) 1866-1878
The geology of Mars and the stratigraphic characteristics of its uppermost crust (mega-regolith) suggest that some of the pervasively-occurring pitted cones, mounds, and flows may have formed through processes akin to terrestrial mud volcanism. A comparison of terrestrial mud volcanism suggests that equivalent Martian processes likely required discrete sedimentary depocenters,...
