Neogene contraction between the San Andreas fault and the Santa Clara Valley, San Francisco Bay region, California
Robert J. McLaughlin, V.E. Langenheim, K. M. Schmidt, R.C. Jachens, R. G. Stanley, A. S. Jayko, K. A. McDougall, J. C. Tinsley, Z. C. Valin
1999, International Geology Review (41) 1-30
In the southern San Francisco Bay region of California, oblique dextral reverse faults that verge northeastward from the San Andreas fault experienced triggered slip during the 1989 M7.1 Loma Prieta earthquake. The role of these range-front thrusts in the evolution of the San Andreas fault system and the future seismic...
Inhibition of precipitation and aggregation of metacinnabar (mercuric sulfide) by dissolved organic matter isolated from the Florida Everglades
M. Ravichandran, G. R. Aiken, J. N. Ryan, M.M. Reddy
1999, Environmental Science & Technology (33) 1418-1423
Precipitation and aggregation of metacinnabar (black HgS) was inhibited in the presence of low concentrations (≥3 mg C/L) of humic fractions of dissolved organic matter (DOM) isolated from the Florida Everglades. At low Hg concentrations (≤5 × 10-8 M), DOM prevented the precipitation of metacinnabar. At moderate Hg...
Aspergillosis
M. Friend
1999, Information and Technology Report 1999-0001
Aspergillosis is a respiratory tract infection caused by fungi of the genus Aspergillus, of which A. fumigatus is the primary species responsible for infections in wild birds (Fig. 13.1). Aspergillosis is not contagious (it will not spread from bird to bird), and it may be an acute, rapidly fatal disease...
Klamath-Siskiyou herpetofauna: Biogeographic patterns and conservation strategies
R. Bruce Bury, Christopher Pearl
1999, Natural Areas Journal (19) 341-350
The Klamath-Siskiyou region of southwest Oregon and northwest California (USA) has some of the most complex landscape mosaics and plant communities in western North America, reflecting its marked diversity of precipitation and topography. With 38 native species of amphibians and reptiles, the Klamath-Siskiyou region has the most species-rich herpetofauna of...
Ambystoma gracile (Northwestern Salamander): Predation and cannibalism
Robert L. Hoffman, Gary L. Larson
1999, Herpetological Review (30) 159-159
Lack of information concerning predatory interactions between Ambystoma gracile and Ambystoma macrodactylum (long-toed salamander) larvae, as well as potential cannibalism within A. gracile populations, prompted us to conduct a field experiment to investigate the potential for this inter- and intraspecific predation. This field experiment was conducted at a lake in...
Concentrations of selenium, mercury, and lead in blood of emperor geese in western Alaska
J. C. Franson, Joel A. Schmutz, L. H. Creekmore, A. C. Fowler
1999, Environmental Toxicology and Chemistry (18) 965-969
We found up to 10 ppm wet weight of selenium in blood samples collected from emperor geese (Chen canagica) on their breeding grounds on the Yukon‐Kuskokwim Delta in western Alaska, USA. Incubating adult females captured in late May through mid‐June 1997 had significantly higher concentrations of selenium in their blood...
Response of high-elevation forests in the Olympic Mountains to climatic change
A.N. Zolbrod, D. L. Peterson
1999, Canadian Journal of Forest Research (29) 1966-1978
The gap model ZELIG was used to examine the effects of increased temperature (2°C) and altered precipitation on high-elevation ecosystems of the Olympic Mountains, Washington, U.S.A. Changes in tree species distribution and abundance, as well as stand biomass, were examined on north and south aspects in the dry northeast (NE)...
Non-native grass invasions and fire in the Mojave Desert
M.L. Brooks, T. Esque
1999, Fact Sheet -
No abstract available at this time...
Renal coccidiosis
Rebecca A. Cole
1999, Information and Technology Report 1999-0001
Renal coccidiosis is caused by protozoal parasites that infect the kidneys and associated tissues. Most of the coccidia that infect the tissues in birds are Eimeria sp. As with most other parasitic infections, this infection is not synonymous with clinical or apparent disease. Asymptomatic infections are far more common than...
Assessing groundwater vulnerability to agrichemical contamination in the Midwest US
M. R. Burkart, D.W. Kolpin, D.E. James
1999, Water Science and Technology (39) 103-112
Agrichemicals (herbicides and nitrate) are significant sources of diffuse pollution to groundwater. Indirect methods are needed to assess the potential for groundwater contamination by diffuse sources because groundwater monitoring is too costly to adequately define the geographic extent of contamination at a regional or national scale. This paper presents examples...
Long-term prairie falcon population changes in relation to prey abundance, weather, land uses, and habitat conditions
Karen Steenhof, Michael N. Kochert, L.B. Carpenter, Robert N. Lehman
1999, The Condor (101) 28-41
We studied a nesting population of Prairie Falcons (Falco mexicanus) in the Snake River Birds of Prey National Conservation Area (NCA) from 1974-1997 to identify factors that influence abundance and reproduction. Our sampling period included two major droughts and associated crashes in Townsend's ground squirrel (Spermophilus townsendii) populations. The number...
Reproductive characteristics of migratory golden eagles in Denali National Park, Alaska
Carol L. McIntyre, Layne G. Adams
1999, The Condor (101) 115-123
We describe reproductive characteristics of Golden Eagles (Aquila chrysaetos) breeding in Denali National Park, Alaska during an entire snowshoe hare (Lepus americanus) cycle, 1988-1997. Data on nesting eagles were collected at 58 to 72 nesting areas annually using two aerial surveys. Surveys were conducted during the incubation period to determine...
Annotated bibliography
Robert H. Armstrong, Mary F. Willson, Martin D. Robards, John F. Piatt
Martin D. Robards, Mary F. Willson, Robert H. Armstrong, John F. Piatt, editor(s)
1999, Book chapter, Sand lance: A review of biology and predator relations and annotated bibliography (USDA Forest Service Research Paper PNW-RP-521)
This bibliography contains over 1,700 published and unpublished references on the family Ammodytidae with an emphasis on the genus Ammodytes. The references are alphabetical by author and then by year of publication.Abstracts and summaries are included for the references we have seen and those provided electronically by others. Abstracts written...
Tributary stream infiltration as a source of herbicides in an alluvial aquifer
Michael R. Burkart, William W. Simpkins, Paul J. Squillace, Martin Helmke
1999, Journal of Environmental Quality (28) 69-74
Where Walnut Creek flows across the South Skunk River alluvial aquifer, it provides a potential source of herbicides and herbicide metabolites. This straightened reach of the creek loses water and dissolved contaminants to the alluvial aquifer through a layer of fine-grained flood plain deposits. Estimates of...
Plasma steroid concentrations and male phallus size in juvenile alligators from seven Florida lakes
L.J. Guillette Jr., A.R. Woodward, D.A. Crain, D.B. Pickford, A. A. Rooney, H.F. Percival
1999, General and Comparative Endocrinology (116) 356-372
Neonatal and juvenile alligators from contaminated Lake Apopka in central Florida exhibit abnormal plasma sex steroid concentrations as well as morphological abnormalities of the gonad and phallus. This study addresses whether similar abnormalities occur in juvenile alligators inhabiting six other lakes in Florida. For analysis, animals were partitioned into two...
Scale-dependent habitat use in three species of prairie wetland birds
D.E. Naugle, K.F. Higgins, S.M. Nusser, W.C. Johnson
1999, Landscape Ecology (14) 267-276
We evaluated the influence of scale on habitat use for three wetland-obligate bird species with divergent life history characteristics and possible scale-dependent criteria for nesting and foraging in South Dakota, USA. A stratified, two-stage cluster sample was used to randomly select survey wetlands within strata defined by region, wetland density,...
Management implications of fish trap effectiveness in adjacent coral reef and gorgonian habitats
Nicholas Wolff, Rikki Grober-Dunsmore, Caroline S. Rogers, James P. Beets
1999, Environmental Biology of Fishes (55) 81-90
A combination of visual census and trap sampling in St. John, USVI indicated that traps performed better in gorgonian habitat than in adjacent coral reef habitat. Although most families were seen more commonly in coral habitat, they were caught more often in gorgonian areas. Traps probably fished more effectively in...
Three-dimensional velocity structure of Siletzia and other accreted terranes in the Cascadia forearc of Washington
T. Parsons, R.E. Wells, M. A. Fisher, E. Flueh, Uri S. ten Brink
1999, Journal of Geophysical Research B: Solid Earth (104) 18015-18039
Eocene mafic crust with high seismic velocities underlies much of the Oregon and Washington forearc and acts as a backstop for accretion of marine sedimentary rocks from the obliquely subducting Juan de Fuca slab. Arc-parallel migration of relatively strong blocks of this terrane, known as Siletzia, focuses upper crustal deformation...
Overview of hydro-acoustic current-measurement applications by the U.S. geological survey in Indiana
Scott E. Morlock, James A. Stewart
1999, Proceedings of the IEEE Working Conference on Current Measurement 112-116
The U.S. Geological Survey (USGS) maintains a network of 170 streamflow-gaging stations in Indiana to collect data from which continuous records of river discharges are produced. Traditionally, the discharge record from a station is produced by recording river stage and making periodic discharge measurements through a range of stage, then...
Integrating physical and chemical characteristics of lakes into the glacially influenced landscape of the Northern Cascade Mountains, Washington State, USA
Gary L. Larson, G.A. Lomnicky, Robert Hoffman, W.J. Liss, E. Deimling
1999, Environmental Management (24) 219-228
A basic knowledge of the physical and chemical characteristics of lakes is needed by management to make informed decisions to protect water resources. In this study we investigated some of the physical and chemical characteristics of 58 lakes in alpine, subalpine, and forest vegetation zones in a natural area (North...
Electrocution
N. J. Thomas
1999, Information and Technology Report 1999-0001
Power lines and power poles present a potential electrocution hazard to wild birds. Many birds, especially raptors, select power poles for perching, and, sometimes, for nesting (Figs. 50.1–3). If a bird’s appendages bridge the gap between two energized parts or between an energized and a grounded metal part, electricity flows...
Avian pox
W. Hansen
1999, Information and Technology Report 1999-0001
Avian pox is the common name for a mild-to-severe, slowdeveloping disease of birds that is caused by a large virus belonging to the avipoxvirus group, a subgroup of poxviruses. This group contains several similar virus strains; some strains have the ability to infect several groups or species of birds but...
Mercury methylation in periphyton of the Florida Everglades
L.B. Cleckner, C.C. Gilmour, J.P. Hurley, D. P. Krabbenhoft
1999, Limnology and Oceanography (44) 1815-1825
Trophic accumulation of mercury (Hg) in aquatic ecosystems is of global concern due to health effects associated with eating fish with elevated Hg levels. The methylated form of Hg bioaccumulates so it is important to understand how inorganic Hg is transformed to methylmercury in the environment. Here, a new site...
Development and corroboration of a bioenergetics model for northern pikeminnow (Ptychocheilus oregonensis) feeding on juvenile salmonids in the Columbia River
J.H. Petersen, D.L. Ward
1999, Transactions of the American Fisheries Society (128) 784-801
A bioenergetics model was developed and corroborated for northern pikeminnow Ptychocheilus oregonensis, an important predator on juvenile salmonids in the Pacific Northwest. Predictions of modeled predation rate on salmonids were compared with field data from three areas of John Day Reservoir (Columbia River). To make bioenergetics model estimates of predation...
Diel movement and habitat use by paddlefish in Navigation Pool 8 of the upper Mississippi River
Steven J. Zigler, Michael R. Dewey, Brent C. Knights
1999, North American Journal of Fisheries Management (19) 180-187
We studied diel movement and habitat use by paddlefish Polyodon spathula implanted with radio transmitters in Navigation Pool 8 of the upper Mississippi River. We radio-tracked five paddlefish during three randomly chosen 24-h periods each month in May, Aug, and Oct 1995. Paddlefish were located by boat one to three...
