Toxicity of o,p′-DDE to medaka d-rR strain after a one-time embryonic exposure by in ovo nanoinjection: An early through juvenile life cycle assessment
Sergio A. Villalobos, Diana M. Papoulias, Stephanie D. Pastva, Alan L. Blankenship, John C. Meadows, Donald E. Tillitt, John P. Giesy
2003, Chemosphere (53) 819-826
The toxicity of o,p′-DDE (1,1-dichloro-2-(p-chlorophenyl)-2-(o-chlorophenyl) ethylene) was evaluated in embryos of medaka (Oryzias latipes) following a one time exposure via nanoinjection. Medaka eggs (early gastrula) were injected with 0.5 nl of triolein (vehicle control) or 0.5 nl of 4 graded doses (0.0005-0.5 ng/egg) of o,p′-DDE in triolein. Embryos were allowed...
Analysis of Slug Tests in Formations of High Hydraulic Conductivity
J.J. Butler Jr., E.J. Garnett, J.M. Healey
2003, Ground Water (41) 620-630
A new procedure is presented for the analysis of slug tests performed in partially penetrating wells in formations of high hydraulic conductivity. This approach is a simple, spreadsheet-based implementation of existing models that can be used for analysis of tests from confined or unconfined aquifers. Field examples of tests exhibiting...
An analytical formulation of two‐dimensional groundwater dispersion induced by surficial recharge variability
Eric D. Swain, David A. Chin
2003, Water Resources Research (39) 17-1-17-8
A predominant cause of dispersion in groundwater is advective mixing due to variability in seepage rates. Hydraulic conductivity variations have been extensively researched as a cause of this seepage variability. In this paper the effect of variations in surface recharge to a shallow surficial aquifer is investigated as an important...
Climate change and Arctic ecosystems: 2. Modeling, paleodata-model comparisons, and future projections
J.O. Kaplan, N.H. Bigelow, I. C. Prentice, S. P. Harrison, P. J. Bartlein, T.R. Christensen, W. Cramer, N.V. Matveyeva, A. D. McGuire, D.F. Murray, V.Y. Razzhivin, B. Smith, D.A. Walker, P. M. Anderson, A.A. Andreev, L.B. Brubaker, M. E. Edwards, A.V. Lozhkin
2003, Journal of Geophysical Research D: Atmospheres (108)
Large variations in the composition, structure, and function of Arctic ecosystems are determined by climatic gradients, especially of growing-season warmth, soil moisture, and snow cover. A unified circumpolar classification recognizing five types of tundra was developed. The geographic distributions of vegetation types north of 55°N, including the position of the...
Deciphering the social structure of Marbled Murrelets from behavioral observations at sea
Suzann G. Speckman, John F. Piatt, Alan M. Springer
2003, Waterbirds (26) 266-274
We surveyed Marbled Murrelets (Brachyramphus marmoratus) daily from small boats in Auke Bay and Fritz Cove, Alaska, from May through August 1992 and 1993. Differences in numbers of juveniles and in the timing of their presence in the study area between the two years indicated that breeding phenology was late...
Determination of layer-charge characteristics of smectites
G.E. Christidis, D. D. Eberl
2003, Clays and Clay Minerals (51) 644-655
A new method for calculation of layer charge and charge distribution of smectites is proposed. The method is based on comparisons between X-ray diffraction (XRD) patterns of K-saturated, ethylene glycol-solvated, oriented samples and calculated XRD patterns for three-component, mixed-layer systems. For the calculated patterns it is assumed that the measured...
Effect of isolated fractures on accelerated flow in unsaturated porous rock
Grace W. Su, John R. Nimmo, Maria I. Dragila
2003, Water Resources Research (39) 1-1-1-5
Fractures that begin and end in the unsaturated zone, or isolated fractures, have been ignored in previous studies because they were generally assumed to behave as capillary barriers and remain nonconductive. We conducted a series of experiments using Berea sandstone samples to examine the physical mechanisms controlling flow in a...
Western crevice and cavity-roosting bats
Michael A. Bogan, Paul M. Cryan, Ernest W. Valdez, Laura E. Ellison, Thomas J. O’Shea
2003, Report, Monitoring trends in bat populations of the United States and territories: Problems and prospects (Information and Technology Report 2003-0003)
Among the 45 species of bats that occur in the United States (U.S.), 34 species regularly occur in western regions of the country. Many of these “western” species choose roost sites in crevices or cavities. Herein we provide an introduction to the biology of bats that roost in cavities and...
Formation and evolution of valley-bottom and channel features, Lower Deschutes River, Oregon
Janet H. Curran, Jim E. O’Conner
Jim E. O’Conner, Gordon E. Grant, editor(s)
2003, AGU Water Science and Application Series 7-5
Primary geologic and geomorphic processes that formed valley-bottom and channel features downstream from the Pelton-Round Butte dam complex are inferred from a canyon-long analysis of feature morphology, composition, location, and spatial distribution. Major controls on valley-bottom morphology are regional tectonics, large landslides, and outsized floods (floods with return periods greater...
High latitude marine reserve research in Glacier Bay National Park
S. James Taggart, Jennifer Mondragon, A.G. Andrews, J.K. Nielsen
2003, Alaska Park Science (2) 27-31
Glacier Bay National Park and Preserve is dominated by the marine waters that make up nearly one-fifth of the park’s area. Since the late 1800s, the nutrient rich waters of Glacier Bay have supported highly productive commercial fisheries. Congress closed fishing in parts of Glacier Bay National Park in 1999,...
Trends in the sediment yield of the Sacramento River, 1957-2001
S.A. Wright, D. H. Schoellhamer
2003, Conference Paper, Proceedings of the 2003 CALFED Science Conference
No abstract available....
Effects of spatial and temporal variability of turbidity on phytoplankton blooms
Christine L. May, Jeffrey R. Koseff, Lisa Lucas, James E. Cloern, David H. Schoellhamer
2003, Marine Ecology Progress Series (254) 111-128
A central challenge of coastal ecology is sorting out the interacting spatial and temporal components of environmental variability that combine to drive changes in phytoplankton biomass. For 2 decades, we have combined sustained observation and experimentation in South San Francisco Bay (SSFB) with numerical modeling analyses to search for general...
Specific-conductance, water-temperature, and water-level data, San Francisco Bay, California, for water years 2001-2002
P.A. Buchanan
2003, Interagency Ecological Program Newsletter (16) 25-30
This article presents time-series plots of specific-conductance, water-temperature, and water-level data collected in San Francisco Bay during water years 2001 and 2002 (October 1, 2000, through September 30, 2002). Specific-conductance and water-temperature data were recorded at 15-minute intervals at the following US Geological Survey (USGS) locations (Figure 1): • Suisun...
Ecology of Tamarix ramosissima in western North America and Central Asia
P.B. Shafroth
2003, Conference Paper, Invasions of alien species in holarctic: proceedings of the US-Russia Symposium in Invasive Species
No abstract available....
Environmental fate and effects of the lampricide TFM: a review
T.D. Hubert
2003, Journal of Great Lakes Research (29) 456-474
Use of 3-trifluoromethyl-4-nitrophenol (TFM) is limited geographically to the Great Lakes basin where it is the principal agent used in control of the sea lamprey (Petromyzon marinus). It is clear from available data that TFM has effects on the environment, but the effects reported are transient. Individual organisms and aquatic...
U.S. Geological Survey Greater Everglades Science Program: 2002 Biennial Report
Arturo E. Torres, Aaron L. Higer, Heather S. Henkel, Patsy R. Mixson, Jane R. Eggleston, Teresa L. Embry, Gail Clement
2003, Open-File Report 03-54
IntroductionThe U.S. Geological Survey (USGS) conducts scientific investigations in south Florida to improve society’s understanding of the environment and assist in the sustainable use, protection, and restoration of the Everglades and other ecosystems within the region. The investigations summarized in this document have been carried out under the Greater Everglades...
Small-Scale Vertical Distribution of Bacterial Biomass and Diversity in Biological Soil Crusts from Arid Lands in the Colorado Plateau
F. Garcia-Pichel, S. L. Johnson, D. Youngkin, J. Belnap
2003, Microbial Ecology (46) 312-321
We characterized, at millimeter resolution, bacterial biomass, diversity, and vertical stratification of biological soil crusts in arid lands from the Colorado Plateau. Microscopic counts, extractable DNA, and plate counts of viable aerobic copiotrophs (VAC) revealed that the top centimeter of crusted soils contained atypically large bacterial populations, tenfold larger than...
Efficacy of hydrogen peroxide in controlling mortality associated with saprolegniasis on walleye, white sucker, and paddlefish eggs
M.P. Gaikowski, J.J. Rach, M. Drobish, J. Hamilton, T. Harder, L.A. Lee, C. Moen, A. Moore
2003, North American Journal of Aquaculture (65) 349-355
The efficacy of hydrogen peroxide in controlling saprolegniasis on eggs of walleye Stizostedion vitreum, white sucker Catostomus commersoni, and paddlefish Polyodon spathula was evaluated at four private, state, and federal production hatcheries participating in an Investigational New Animal Drug efficacy study (experiment 1; walleyes) and in a laboratory-based miniature egg...
Movement and habitat use by radio-tagged paddlefish in the upper Mississippi River and tributaries
S. J. Zigler, M. R. Dewey, B.C. Knights, A.L. Runstrom, M.T. Steingraeber
2003, North American Journal of Fisheries Management (23) 189-205
We used radio telemetry to evaluate the movement and habitat use of paddlefish Polyodon spathula in the upper Mississippi River and two tributary rivers. Radio transmitters were surgically implanted into 71 paddlefish in Navigation Pools 5A and 8 of the upper Mississippi River, the Chippewa River, and the Wisconsin River...
Evaluation of relocation of unionid mussels to in situ refugia
W.G. Cope, M.C. Hove, D. L. Waller, D.J. Hornbach, M.R. Bartsch, L.A. Cunningham, H.L. Dunn, A.R. Kapuscinski
2003, Journal of Molluscan Studies (69) 27-34
The aim of this study was to evaluate the recovery and survival of four species of unionid mussles [pimpleback, Quadrula pustulosa pustulosa (I. Lea, 1831); spike, Elliptio dilatata (Rafinesque, 1820); Higgins eye, Lampsilis higginsii (I. Lea, 1857); and pocketbook, Lampsilis cardium (Rafinesque, 1820)] that were experimentally relocated to in situ...
New Publications of the U.S. Geological Survey, January-March 2003
Water Resources Division, U.S. Geological Survey
2003, Report
A list of USGS publications and articles by U.S. Geological Survey personnel in non-U.S. Geological Survey journals and books that were published in January to March of the year 2003....
New Publications of the U.S. Geological Survey, April-June 2003
Water Resources Division, U.S. Geological Survey
2003, Report
A list of USGS publications and articles by U.S. Geological Survey personnel in non-U.S. Geological Survey journals and books that were published in January to March of the year 2003....
Mass tree mortality leads to mangrove peat collapse at Bay Islands, Honduras after Hurricane Mitch
Donald R. Cahoon, P. Hensel, J. Rybczyk, K.L. McKee, C.E. Proffitt, B.C. Perez
2003, Journal of Ecology (91) 1093-1105
We measured sediment elevation and accretion dynamics in mangrove forests on the islands of Guanaja and Roatan, Honduras, impacted by Hurricane Mitch in 1998 to determine if collapse of underlying peat was occurring as a result of mass tree mortality. Little is known about the balance between production and decomposition...
A survey of estuarine submerged aquatic vegetation in the northern Gulf coast
J. Carter
2003, National Wetlands Newsletter (25) 9-10, 26
The status of submerged aquatic vegetation along the northern Gulf of Mexico is of concern because of its role in the ecology and economy of the coast. Recent studies by U.S. Geological Survey scientists help assess the factors that contribute to SAV distribution and health....
Tidal truncation and barotropic convergence in a channel network tidally driven from opposing entrances
J.C. Warner, D. Schoellhamer, G. Schladow
2003, Estuarine, Coastal and Shelf Science (56) 629-639
Residual circulation patterns in a channel network that is tidally driven from entrances on opposite sides are controlled by the temporal phasing and spatial asymmetry of the two forcing tides. The Napa/Sonoma Marsh Complex in San Francisco Bay, CA, is such a system. A sill on the west entrance to...
