GIS methodology for quantifying channel change in Las Vegas, Nevada
S.E. Buckingham, J.W. Whitney
2007, Journal of the American Water Resources Association (43) 888-898
This study applies spatial analyses to examine the consequences of accelerated urban expansion on a hydrologic system over a period of 24 years. Three sets of historical aerial photos are used in a GIS analysis to document the geomorphic history of Las Vegas Wash, which drains the rapidly growing Las...
Temporal trends in concentrations of DBCP and nitrate in groundwater in the eastern San Joaquin Valley, California, USA
K.R. Burow, N. M. Dubrovsky, James L. Shelton
2007, Hydrogeology Journal (15) 991-1007
Temporal monitoring of the pesticide 1,2-dibromo-3-chloropropane (DBCP) and nitrate and indicators of mean groundwater age were used to evaluate the transport and fate of agricultural chemicals in groundwater and to predict the long-term effects in the regional aquifer system in the eastern San Joaquin Valley, California. Twenty monitoring wells were...
Minimizing noise in fiberglass aquaculture tanks: Noise reduction potential of various retrofits
J. Davidson, A.S. Frankel, W.T. Ellison, S. Summerfelt, A.N. Popper, P. Mazik, J. Bebak
2007, Aquacultural Engineering (37) 125-131
Equipment used in intensive aquaculture systems, such as pumps and blowers can produce underwater sound levels and frequencies within the range of fish hearing. The impacts of underwater noise on fish are not well known, but limited research suggests that subjecting fish to noise could result in impairment of the...
Passive aerobic treatment of net-alkaline, iron-laden drainage from a flooded underground anthracite mine, Pennsylvania, USA
C.A. Cravotta III
2007, Mine Water and the Environment (26) 128-149
This report evaluates the results of a continuous 4.5-day laboratory aeration experiment and the first year of passive, aerobic treatment of abandoned mine drainage (AMD) from a typical flooded underground anthracite mine in eastern Pennsylvania, USA. During 1991-2006, the AMD source, locally known as the Otto Discharge, had flows from...
Red-shouldered hawk occupancy surveys in central Minnesota, USA
C. Henneman, M.A. McLeod, D. E. Andersen
2007, Journal of Wildlife Management (71) 526-533
Forest-dwelling raptors are often difficult to detect because many species occur at low density or are secretive. Broadcasting conspecific vocalizations can increase the probability of detecting forest-dwelling raptors and has been shown to be an effective method for locating raptors and assessing their relative abundance. Recent advances in statistical techniques...
Potential effects of regional pumpage on groundwater age distribution
Brendan A. Zinn, Leonard F. Konikow
2007, Water Resources Research (43)
Groundwater ages estimated from environmental tracers can help calibrate groundwater flow models. Groundwater age represents a mixture of traveltimes, with the distribution of ages determined by the detailed structure of the flow field, which can be prone to significant transient variability. Effects of pumping on age distribution were assessed using...
Comparative toxicity of chlorpyrifos, diazinon, malathion and their oxon derivatives to larval Rana boylii
D. W. Sparling, G. Fellers
2007, Environmental Pollution (147) 535-539
Organophosphorus pesticides (OPs) are ubiquitous in the environment and are highly toxic to amphibians. They deactivate cholinesterase, resulting in neurological dysfunction. Most chemicals in this group require oxidative desulfuration to achieve their greatest cholinesterase-inhibiting potencies. Oxon derivatives are formed within liver cells but also by bacterial decay of parental pesticides....
Possible use of foresight, understanding, and planning by wolves hunting muskoxen
L. David Mech
2007, Arctic (60) 145-149
On Ellesmere Island in 2006, arctic wolves (Canis lupus arctos) were observed making a two-pronged approach to a herd of muskoxen (Ovibos moschatus) and, on another occasion, ambushing muskoxen. Both observations seemed to provide evidence that the wolves were using foresight, understanding, and planning. Although the possible use of insight...
Quantitative mineralogy of surface sediments of the Iceland shelf, and application to down-core studies of holocene ice-rafted sediments
John T. Andrews, D. D. Eberl
2007, Journal of Sedimentary Research (77) 469-479
Quantitative X-ray diffraction analyses on the < 2 mm sediment fraction from the Iceland shelves are reported for subglacial diamictons, seafloor surface sediments, and the last 2000 cal yr BP from two cores. The overall goal of the paper is to characterize the spatial variability of the mineralogy of the...
Chemical quality of depositional sediments and associated soils in New Orleans and the Louisiana peninsula following Hurricane Katrina
C. Adams, E.C. Witt, Jingyuan Wang, D.K. Shaver, D. Summers, Y. Filali-Meknassi, H. Shi, R. Luna, N. Anderson
2007, Environmental Science & Technology (41) 3437-3443
Hurricane Katrina made landfall on the Louisiana peninsula south of New Orleans on Aug 29, 2005. The resulting storm surge caused numerous levy breaches in the parishes of New Orleans as well as on the Louisiana peninsula. This study was conducted to determine the concentrations of inorganic and organic constituents...
Monitoring mangrove forest dynamics of the Sundarbans in Bangladesh and India using multi-temporal satellite data from 1973 to 2000
S. Giri, Bruce Pengra, Z. Zhu, A. Singh, L.L. Tieszen
2007, Estuarine, Coastal and Shelf Science (73) 91-100
Mangrove forests in many parts of the world are declining at an alarming rate—possibly even more rapidly than inland tropical forests. The rate and causes of such changes are not known. The forests themselves are dynamic in nature and are undergoing constant changes due to both natural and anthropogenic forces....
The collapse of pelagic fishes in the upper San Francisco estuary
T. Sommer, C. Armor, R. Baxter, R. Breuer, L. Brown, M. Chotkowski, S. Culberson, F. Feyrer, M. Gingras, B. Herbold, W. Kimmerer, A. Mueller-Solger, M. Nobriga, K. Souza
2007, Fisheries (32) 270-277
Although the pelagic fish community of the upper San Francisco Estuary historically has shown substantial variability, a recent collapse has captured the attention of resource managers, scientists, legislators, and the general public. The ecological and management consequences of the decline are most serious for delta smelt (Hypomesus transpacificus), a threatened...
Probabilistic prediction models for aggregate quarry siting
G.R. Robinson Jr., P.M. Larkins
2007, Natural Resources Research (16) 135-146
Weights-of-evidence (WofE) and logistic regression techniques were used in a GIS framework to predict the spatial likelihood (prospectivity) of crushed-stone aggregate quarry development. The joint conditional probability models, based on geology, transportation network, and population density variables, were defined using quarry location and time of development data for the New...
Rip currents, mega-cusps, and eroding dunes
E.B. Thornton, J. MacMahan, A. H. Sallenger Jr.
2007, Marine Geology (240) 151-167
Dune erosion is shown to occur at the embayment of beach mega-cusps O(200 m alongshore) that are associated with rip currents. The beach is the narrowest at the embayment of the mega-cusps allowing the swash of large storm waves coincident with high tides to reach the toe of the dune,...
Pathophysiology of white-tailed deer vaccinated with porcine zona pellucida immunocontraceptive
Paul D. Curtis, M. E. Richmond, L.A. Miller, F.W. Quimby
2007, Vaccine (25) 4623-4630
White-tailed deer (n = 14 treated, n = 7 control) were examined postmortem to identify any possible pathophysiology resulting from PZP immunocontraception vaccination. Deer were treated twice in 1997; given a booster in 1998, with six being revaccinated in September 2000. Granulomas were found at injection sites of most deer,...
Evaluation of potentially nonlethal sampling methods for monitoring mercury concentrations in smallmouth bass (Micropterus dolomieu)
C. J. Schmitt, W. G. Brumbaugh
2007, Archives of Environmental Contamination and Toxicology (53) 84-95
We evaluated three potentially nonlethal alternatives to fillet sampling for the determination of mercury (Hg) concentrations in smallmouth bass (Micropterus dolomieu). Fish (n = 62, 226-464 mm total length) from six sites in southern Missouri were captured by electrofishing. Blood samples (1 mL) from each fish were obtained by caudal...
Writing on the walls: Geological context and early American spiritual beliefs
S. E. Hough
Piccardi L.Masse W.B., editor(s)
2007, Geological Society Special Publication (273) 107-115
Native American culture in many parts of California is preserved in fragmentary oral and conventional written histories, but also in sometimes dramatic petroglyphs and pictographs throughout the state. The symbolism of these images has been interpreted to reflect the natural environment, in particular issues related to rain. Although there is...
Characterization of microsatellite DNA markers for the alligator snapping turtle, Macrochelys temminckii: Primer note
J.C. Hackler, Ronald A. Van Den Bussche, David M. Leslie Jr.
2007, Molecular Ecology Notes (7) 474-476
Two trinucleotide and seven tetranucleotide microsatellite loci were isolated from an alligator snapping turtle Macrochelys temminckii. To assess the degree of variability in these nine microsatellite loci, we genotyped 174 individuals collected from eight river drainage basins in the southeastern USA. These markers revealed a moderate degree of allelic diversity...
Identifying fecal sources in a selected catchment reach using multiple source-tracking tools
J. R. Vogel, D. M. Stoeckel, R. Lamendella, R. B. Zelt, Domingo J.W. Santo, S.R. Walker, D.B. Oerther
2007, Journal of Environmental Quality (36) 718-729
Given known limitations of current microbial source-tracking (MST) tools, emphasis on small, simple study areas may enhance interpretations of fecal contamination sources in streams. In this study, three MST tools - Escherichia coli repetitive element polymerase chain reaction (rep-PCR), coliphage typing, and Bacteroidales 16S rDNA host-associated markers - were evaluated...
Arsenic, cadmium, lead, and zinc in the Danville and Springfield coal members (Pennsylvanian) from Indiana
Maria Mastalerz, A. Drobniak
2007, International Journal of Coal Geology (71) 37-53
Arsenic, cadmium, lead, and zinc contents and distributions are discussed in two major Pennsylvanian coal beds in Indiana: the Danville Coal Member and the Springfield Coal Member. Arsenic contents of the Danville and Springfield coals show similar ranges from 0.5 to 43??ppm for the Danville Coal and 1 to 50??ppm...
Estimation of forest fuel load from radar remote sensing
S. Saatchi, K. Halligan, Don G. Despain, R.L. Crabtree
2007, IEEE Transactions on Geoscience and Remote Sensing (45) 1726-1740
Understanding fire behavior characteristics and planning for fire management require maps showing the distribution of wildfire fuel loads at medium to fine spatial resolution across large landscapes. Radar sensors from airborne or spaceborne platforms have the potential of providing quantitative information about the forest structure and biomass components that can...
Airborne desert dust and aeromicrobiology over the Turkish Mediterranean coastline
Dale W. Griffin, Nilgun Kubilay, Mustafa Kocak, Mike A. Gray, Timothy C. Borden, Eugene A. Shinn
2007, Atmospheric Environment (41) 4050-4062
Between 18 March and 27 October 2002, 220 air samples were collected on 209 of 224 calendar days, on top of a coastal atmospheric research tower in Erdemli, Turkey. The volume of air filtered for each sample was 340 liters. Two hundred fifty-seven bacterial and 2598 fungal colony forming units...
Changes in a population of exotic rainbow smelt in Lake Superior: Boom to bust, 1974-2005
O. T. Gorman
2007, Journal of Great Lakes Research (33) 75-90
Changes in a population of rainbow smelt (Osmerus mordax) in the Apostle Islands region of Lake Superior were chronicled over a 32-yr time series, 1974–2005. At the beginning of the time series, rainbow smelt was the predominant prey species, abundance of lake herring (Coregonis artedi) was very low, and the...
Distribution and abundance of burrowing mayflies (Hexagenia spp.) in Lake Erie, 1997-2005
K.A. Krieger, M.T. Bur, J.J.H. Ciborowski, D.R. Barton, D. W. Schloesser
2007, Journal of Great Lakes Research (33) 20-33
Burrowing mayflies (Hexagenia limbata and H. rigida) recolonized sediments of the western basin of Lake Erie in the 1990s following decades of pollution abatement. We predicted that Hexageniawould also disperse eastward or expand from existing localized populations and colonize large regions of the other basins. We sampled zoobenthos in parts of the western...
Genetic variability in spotted seatrout (Cynoscion nebulosus), determined with microsatellite DNA markers
R. Ward, K. Bowers, R. Hensley, B. Mobley, E. Belouski
2007, Fishery Bulletin (105) 197-206
Variation in the allele frequencies of five microsatellite loci was surveyed in 1256 individual spotted seatrout (Cynoscion nebulosus) obtained from 12 bays and estuaries from Laguna Madre, Texas, to Charlotte Harbor, Florida, to St. John's River on the Florida Atlantic Coast. Texas and Louisiana collection sites were resampled each year...
