Modelling habitat associations with fingernail clam (Family: Sphaeriidae) counts at multiple spatial scales using hierarchical count models
Brian R. Gray, Roger J. Haro, James T. Rogala, Jennifer S. Sauer
2005, Freshwater Biology (50) 715-729
1. Macroinvertebrate count data often exhibit nested or hierarchical structure. Examples include multiple measurements along each of a set of streams, and multiple synoptic measurements from each of a set of ponds. With data exhibiting hierarchical structure, outcomes at both sampling (e.g. within stream) and aggregated (e.g. stream) scales are...
Strong effects of predation by fishes on an invasive macroinvertebrate in a large floodplain river
Michelle R. Bartsch, Lynn Bartsch, Steve Gutreuter
2005, Journal of the North American Benthological Society (24) 168-177
We assessed the effects of fish predation on zebra mussels (Dreissena polymorpha) in Navigation Pool 8 of the Upper Mississippi River from 13 May to 5 October, 1998. Concrete-block samplers were deployed at 18 randomly chosen sites in the main-channel border, with 6 sites in the upper, middle, and lower...
Preliminary analysis of strong-motion recordings from the 28 September 2004 Parkfield, California earthquake
Anthony Shakal, Vladimir Graizer, Moh Huang, Rodger D. Borcherdt, Hamid Haddadi, Kuo-Wan Lin, Christopher D. Stephens, P. Roffers
2005, Seismological Research Letters (76) 27-39
The 2004 Mw 6.0 Parkfield earthquake of 28 September 2004 occurred on the San Andreas Fault near the small town of Parkfield in central California. As a result of a widely accepted likelihood of an earthquake in the area, a large number of strong-motion stations and...
Predation vulnerability of two gobies (Microgobius gulosus; Gobiosoma robustum) is not related to presence of seagrass
P. J. Schofield
2005, Florida Scientist (68) 25-34
Abstract not supplied at this time...
Epizootiology of spirorchid infection in green turtles (Chelonia mydas) in Hawaii
Thierry M. Work, George H. Balazs, Jody L. Schumacher, Amarisa Marie
2005, Journal of Parasitology (91) 871-876
We describe the epizootiology of spirorchiid trematode infections in Hawaiian green turtles (Chelonia mydas) by quantifying tissue egg burdens in turtles submitted for necropsy and by assessing antibody response to crude adult worm and egg antigens among a variety of age groups. Hapalotrema sp. and Laeredius sp. predominated in turtles...
Source and movement of helium in the eastern Morongo groundwater Basin: The influence of regional tectonics on crustal and mantle helium fluxes
J.T. Kulongoski, David R. Hilton, J. A. Izbicki
2005, Geochimica et Cosmochimica Acta (69) 3857-3872
We assess the role of fracturing and seismicity on fluid-driven mass transport of helium using groundwaters from the eastern Morongo Basin (EMB), California, USA. The EMB, located ???200 km east of Los Angeles, lies within a tectonically active region known as the Eastern California Shear Zone that exhibits both strike-slip...
Technology and the study of wildfire: Middle school students study the impacts of wildfire
D. Fox-Gliessman, J.J. Kerski
2005, Meridian (8)
Various technologies that can assist students in exploring the human and environmental impacts of wildfire and in communicating their findings are discussed. Wildfires occur in many parts of the world, and provide an excellent opportunity for students to study local and global interdisciplinary issues using technology. Prior to the beginning...
Associations between water quality, Pasteurella multocida, and avian cholera at Sacramento National Wildlife Refuge
M. A. Lehr, R. G. Botzler, Michael D. Samuel, Daniel J. Shadduck
2005, Journal of Wildlife Diseases (41) 291-297
We studied patterns in avian cholera mortality, the presence of Pasteurella multocida in the water or sediment, and water chemistry characteristics in 10 wetlands at the Sacramento National Wildlife Refuge Complex (California, USA), an area of recurrent avian cholera epizootics, during the winters of 1997 and 1998. Avian cholera outbreaks (≥50 dead...
Occurrence and growth characteristics of Escherichia coli and enterococci within the accumulated fluid of the northern pitcher plant (Sarracenia purpurea L.)
Richard L. Whitman, Stacey E. Byers, Dawn A. Shively, Donna M. Ferguson, Muruleedhara N. Byappanahalli
2005, Canadian Journal of Microbiology (51) 1027-1037
Sarracenia purpurea L., a carnivorous bog plant (also known as the pitcher plant), represents an excellent model of a well-defined, self-contained ecosystem; the individual pitchers of the plant serve as a microhabitat for a variety of micro- and macro-organisms. Previously, fecal indicator bacteria (Escherichia coli and enterococci) were shown as...
Effects of depleted uranium on survival, growth, and metamorphosis in the african clawed frog (Xenopus laevis)
S.E. Mitchell, C.A. Caldwell, G. Gonzales, W.R. Gould, R. Arimoto
2005, Conference Paper, Journal of Toxicology and Environmental Health - Part A
Embryos (stage 8-47, Nieuwkoop and Faber) of the African clawed frog (Xenopus laevis) were subjected to water-borne depleted uranium (DU) concentrations that ranged from 4.8 to 77.7 mg/Lusing an acute 96-h frog embryo teratogenesis assay-Xenopus (FETAX). In a chronic 64-d assay, X. laevis (from embryo through metamorphosis; stages 8-66) were...
Do breeding phase and detection distance influence the effective area surveyed for northern goshawks?
A.M. Roberson, D. E. Andersen, P.L. Kennedy
2005, Journal of Wildlife Management (69) 1240-1250
Broadcast surveys using conspecific calls are currently the most effective method for detecting northern goshawks (Accipiter gentilis) during the breeding season. These surveys typically use alarm calls during the nestling phase and juvenile food-begging calls during the fledgling-dependency phase. Because goshawks are most vocal during the courtship phase, we hypothesized...
Variation in the reference Shields stress for bed load transport in gravel‐bed streams and rivers
Erich R. Mueller, John Pitlick, Jonathan M. Nelson
2005, Water Resources Research (41)
The present study examines variations in the reference shear stress for bed load transport (τr) using coupled measurements of flow and bed load transport in 45 gravel‐bed streams and rivers. The study streams encompass a wide range in bank‐full discharge (1–2600 m3/s), average channel gradient (0.0003–0.05), and median surface grain...
Paleolimnological investigations of anthropogenic environmental change in Lake Tanganyika: I. An introduction to the project
A.S. Cohen, M. R. Palacios-Fest, J. McGill, P.W. Swarzenski, D. Verschuren, R. Sinyinza, T. Songori, B. Kakagozo, M. Syampila, C. M. O’Reilly, S.R. Alin
2005, Journal of Paleolimnology (34) 1-18
We investigated paleolimnological records from a series of river deltas around the northeastern rim of Lake Tanganyika, East Africa (Tanzania and Burundi) in order to understand the history of anthropogenic activity in the lake's catchment over the last several centuries, and to determine the impact of these activities on the...
Comparative soil CO2 flux measurements and geostatistical estimation methods on Masaya volcano, Nicaragua
Jennifer L. Lewicki, Deborah Bergfeld, Carlo Cardellini, Giovanni Chiodini, Domenico Granieri, Nick Varley, Cynthia A. Werner
2005, Bulletin of Volcanology (68) 76-90
We present a comparative study of soil CO2 flux (FCO2">FCO2) measured by five groups (Groups 1–5)...
Avian cholera exposure and carriers in greater white-fronted geese breeding in Alaska, USA
Michael D. Samuel, Daniel J. Shadduck, Diana R. Goldberg
2005, Journal of Wildlife Diseases (41) 498-502
We conducted a 3-yr study (2001–03) on greater white-fronted geese (Anser albifrons frontalis) breeding in Alaska, USA, to determine the exposure of this population to Pasteurella multocida and the potential role of these birds as disease carriers. We tested sera from nearly 600 adult geese for antibodies to P. multocida serotype 1. We found...
The introduced ribbed mussel (Geukensia demissa) in Estero de Punta Banda, Mexico: Interactions with the native cord grass, Spartina foliosa
M.E. Torchin, R. F. Hechinger, T.C. Huspeni, K.L. Whitney, K. D. Lafferty
2005, Biological Invasions (7) 607-614
Introduced populations of Guekensia demissa occur on the west coast of North America. They have been reported in San Francisco Bay, four southern California wetlands, and in Estero de Punta Banda (EPB), Baja California Norte, Mexico. We randomly sampled benthic invertebrates in four habitat types within EPB: marsh, channel, mudflat...
Eider females form non-kin brood-rearing coalitions
M. Ost, E. Vitikainen, P. Waldeck, L. Sundstrom, K. Lindstrom, Tuula E. Hollmen, J. Christian Franson, Mikaei Kilpi
2005, Molecular Ecology (14) 3903-3908
Kin selection is a powerful tool for understanding cooperation among individuals, yet its role as the sole explanation of cooperative societies has recently been challenged on empirical grounds. These studies suggest that direct benefits of cooperation are often overlooked, and that partner choice may be a widespread mechanism of cooperation....
Growth, dispersal, mortality, and contribution of largemouth bass stocked into Chickamauga Lake, Tennessee
K.J. Hoffman, P.W. Bettoli
2005, North American Journal of Fisheries Management (25) 1518-1527
Marked fingerling largemouth bass Micropterus salmoides (both northern M. s. salmoides and Florida subspecies M. s. floridanus and their hybrid) were stocked into Chickamauga Lake, Tennessee, to enhance angling and introgress the Florida subspecies into the local gene pool. We evaluated mass marking and stocking success by sampling the stocked...
Bay sediment budget: Sediment accounting 101
David H. Schoellhamer, Megan A. Lionberger, Bruce E. Jaffe, Neil K. Ganju, Scott Wright, Gregory Shellenbarger
2005, Pulse of the Estuary 2005
Comparison of a budget developed for 1955-1990 with a budget developed for 1995- 2002 showed decreasing sediment inflow and increased amounts leaving the Bay to upland disposal and sand mining, resulting in an increased rate of erosion of sediment from the Bay floor Finding a way to shift disposal from the...
Part 2: A field study of enhanced remediation of Toluene in the vadose zone using a nutrient solution
J.A. Tindall, E.P. Weeks, M. Friedel
2005, Water, Air, & Soil Pollution (168) 359-389
The objective of this study was to test the effectiveness of a nitrate-rich nutrient solution and hydrogen peroxide (H2O2) to enhance in-situ microbial remediation of toluene in the unsaturated zone. Three sand-filled plots were tested in three phases (each phase lasting approximately 2 weeks). During the control phase, toluene...
Stable isotope ratios in swale sequences of Lake Superior as indicators of climate and lake level fluctuations during the Late Holocene
Shruti Sharma, G. Mora, J.W. Johnston, T.A. Thompson
2005, Quaternary Science Reviews (24) 1941-1951
Beach ridges along the coastline of Lake Superior provide a long-term and detailed record of lake level fluctuations for the past 4000 cal BP. Although climate change has been invoked to explain these fluctuations, its role is still in debate. Here, we reconstruct water balance by employing peat samples collected...
Comparison of methods used to estimate conventional undiscovered petroleum resources: World examples
Thomas S. Ahlbrandt, T. R. Klett
2005, Conference Paper, Natural Resources Research
Various methods for assessing undiscovered oil, natural gas, and natural gas liquid resources were compared in support of the USGS World Petroleum Assessment 2000. Discovery process, linear fractal, parabolic fractal, engineering estimates, PETRIMES, Delphi, and the USGS 2000 methods were compared. Three comparisons of these methods were made in: (1)...
Surface energy exchanges along a tundra-forest transition and feedbacks to climate
J. Beringer, F. S. Chapin III, Catharine Copass Thompson, A. D. McGuire
2005, Agricultural and Forest Meteorology (131) 143-161
Surface energy exchanges were measured in a sequence of five sites representing the major vegetation types in the transition from arctic tundra to forest. This is the major transition in vegetation structure in northern high latitudes. We examined the influence of vegetation structure on the rates of sensible heating and...
Temporal and spatial variation in relative abundance and length structure of salmonids in reservoirs: Implications for monitoring
D.T. Rhea, W.A. Hubert, R.S. Gangl, R.A. Whaley
2005, North American Journal of Fisheries Management (25) 1301-1309
Spatial and temporal variations in salmonid catch per unit effort (C/f) may affect monitoring efforts in lakes and reservoirs. This study evaluated the spatial and temporal variation in gill-net C/f and length structure of captured salmonids in nearshore (???7.6-m bottom depth) and offshore (>7.6-m bottom depth) areas of two Wyoming...
Aqueous stability of gadolinium in surface waters receiving sewage treatment plant effluent Boulder Creek, Colorado
P. L. Verplanck, Howard E. Taylor, D. Kirk Nordstrom, L. B. Barber
2005, Environmental Science & Technology (39) 6923-6929
In many surface waters, sewage treatment plant (STP) effluent is a substantial source of both regulated and unregulated contaminants, including a suite of complex organic compounds derived from household chemicals, pharmaceutical, and industrial and medical byproducts. In addition, STP effluents in some urban areas have also been shown to have...
