Breeding bird response to juniper woodland expansion
Steven S. Rosenstock, Charles van Riper III
2001, Journal of Range Management (54) 226-232
In recent times, pinyon (Pinus spp.)-juniper (Juniperus spp.) woodlands have expanded into large portions of the Southwest historically occupied by grassland vegetation. From 1997-1998, we studied responses of breeding birds to one-seed juniper (J. monosperma) woodland expansion at 2 grassland study areas in northern Arizona. We sampled breeding birds in...
Leaping lopsided: a review of the current hypotheses regarding etiologies of limb malformations in frogs
I.K. Loeffler, D.L. Stocum, J.F. Fallon, C.U. Meteyer
2001, The Anatomical Record Part B: The New Anatomist (265) 228-245
Recent progress in the investigation of limb malformations in free-living frogs has underlined the wide range in the types of limb malformations and the apparent spatiotemporal clustering of their occurrence. Here, we review the current understanding of normal and abnormal vertebrate limb development and regeneration and discuss some of the...
Databases and simplified geology for mineralized areas, claims, mines and prospects in Wyoming
Anna B. Wilson, Terry L. Klein, William D. Heran
2001, Open-File Report 2001-497
No abstract available....
Water quality and nutrient loading in the Klamath River between Keno, Oregon and Seiad Valley, CA from 1996-1998
Sharon G. Campbell
2001, Open-File Report 2001-301
A water quality study was performed in the mainstem Klamath River from Keno, Oregon to Seiad Valley, California during 1996 through 1998. Four sites within the study area were continuously monitored using multiparameter recorders. Water quality sampling was also performed at these four locations in 1996 and 1997. Additional water...
Killdeer population trends in North America
Peter M. Sanzenbacher, Susan M. Haig
2001, Journal of Field Ornithology (72) 160-169
Killdeers (Charadrius vociferus) are considered a common species that inhabits a wide range of wetland and upland habitats throughout much of North America, yet recent information suggests that they may be declining regionally, if not throughout much of their range. To address this issue, we examined population trends of this...
Physiological variation among native and exotic winter annuals associated with microphytic soil crusts in the Mojave Desert
Lesley DeFalco, James K. Detling, C. Richard Tracy, Steven D. Warren
2001, Plant and Soil (234) 1-14
Microbiotic crusts are important components of many aridland soils. Research on crusts typically focuses on the increase in soil fertility due to N-fixing micro-organisms, the stabilization of soils against water and wind erosion and the impact of disturbance on N-cycling. The effect of microbiotic crusts on the associated plant community...
A Technique for Detecting Eyeshine of Amphibians and Reptiles
Chris Corben, Gary M. Fellers
2001, Herpetological Review (32) 89-91
New views of granular mass flows
R.M. Iverson, J.W. Vallance
2001, Geology (29) 115-118
Concentrated grain-fluid mixtures in rock avalanches, debris flows, and pyroclastic flows do not behave as simple materials with fixed rheologies. Instead, rheology evolves as mixture agitation, grain concentration, and fluid-pressure change during flow initiation, transit, and deposition. Throughout a flow, however, normal forces on planes parallel to the free upper...
National Wildlife Health Center's Quarterly Mortality Report
K. A. Converse, A. Schrader
2001, Supplement to the Journal of Wildlife Diseases (37)
PHABSIM for Windows User's Manual and Exercises
Terry Waddle
2001, Open-File Report 2001-340
This document is a combined self-study textbook and reference manual. The material is presented in the general order of a PHABSIM study placed within the context of an IFIM application. The document may also be used as reading material for a lecture-based course....
Thermal maturity patterns in New York State using CAI and %Ro
D. J. Weary, R. T. Ryder, R.E. Nyahay
2001, Northeastern Geology and Environmental Sciences (23) 356-376
New conodont alteration index (CAI) and vitrinite reflectance (%Ro) data collected from drill holes in the Appalachian basin of New York State allow refinement of thermal maturity maps for Ordovician and Devonian rocks. CAI isotherms on the new maps show a pattern that approximates that published by Harris et al....
Effect of flooding and draw-down disturbance on germination from a seashore meadow seed bank
H.M. Jutila
2001, Journal of Vegetation Science (12) 729-738
The objective of this study was to investigate the effects of flooding and draw-down on the germination from the coastal grassland seed banks and to determine whether the effect of flooding varies between the delta and the seashore. Seed bank samples were collected from three shore transects in SW Finland,...
TES mapping of Mars' north seasonal cap
Hugh H. Kieffer, Timothy N. Titus
2001, Icarus (154) 162-180
The Mars Global Surveyor thermal emission spectrometer has made observations of Mars' north polar region for nearly a full martian year. Measurements of bolometric emission and reflectance, as well as brightness temperatures in specific bands synthesized from thermal radiance spectra, are used to track the behavior of surface and atmospheric temperatures, the...
Hydrothermal minerals and microstructures in the Silangkitang geothermal field along the Great Sumatran fault zone, Sumatra, Indonesia
Diane E. Moore, S. Hickman, D.A. Lockner, P.F. Dobson
2001, Geological Society of America Bulletin (113) 1179-1192
Detailed study of core samples of silicic tuff recovered from three geothermal wells along the strike-slip Great Sumatran fault zone near Silangkitang, North Sumatra, supports a model for enhanced hydrothermal circulation adjacent to this major plate-boundary fault. Two wells (A and C) were drilled nearly vertically ∼1 km southwest of...
Forest impact estimated with NOAA AVHRR and landsat TM data related to an empirical hurricane wind-field distribution
Elijah W. Ramsey III, M.E. Hodgson, S.K. Sapkota, G.A. Nelson
2001, Remote Sensing of Environment (77) 279-292
An empirical model was used to relate forest type and hurricane-impact distribution with wind speed and duration to explain the variation of hurricane damage among forest types along the Atchafalaya River basin of coastal Louisiana. Forest-type distribution was derived from Landsat Thematic Mapper image data, hurricane-impact distribution from a suite...
Evidence that coded-wire-tagging procedures can enhance transmission of Renibacterium salmoninarum in chinook salmon
D.G. Elliott, R.J. Pascho
2001, Journal of Aquatic Animal Health (13) 181-193
Binary coded wire tags (CWTs) are used extensively for identification and management of anadromous salmonid populations. A study of bacterial kidney disease (BKD) in two brood year groups of hatchery-reared spring chinook salmon Oncorhynchus tshawytscha provided strong evidence that horizontal transmission of Renibacterium salmoninarum, the causative agent of BKD, might...
Influences of watershed, riparian-corridor, and reach-scale characteristics on aquatic biota in agricultural watersheds
J.S. Stewart, L. Wang, J. Lyons, J.A. Horwatich, R. Bannerman
2001, Journal of the American Water Resources Association (37) 1475-1487
Multivariate analyses and correlations revealed strong relations between watershed and riparian-corridor land cover, and reach-scale habitat versus fish and macroinvertebrate assemblages in 38 warmwater streams in eastern Wisconsin. Watersheds were dominated by agricultural use, and ranged in size from 9 to 71 km2 Watershed land cover was summarized from satellite-derived data...
Stress induced by hooking, net towing, elevated sea water temperature and air in sablefish: Lack of concordance between mortality and physiological measures of stress
M.W. Davis, B.L. Olla, C.B. Schreck
2001, Journal of Fish Biology (58) 1-15
In a series of laboratory studies designed to simulate bycatch processes, sablefish Anoplopoma fimbria were either hooked for up to 24 h or towed in a net for 4 h and then subjected to an abrupt transfer to elevated sea water temperature and air. Mortality did not result from hooking...
Effects of Land-Cover Change, Floods, and Stream Position on Geomorphic Processes - Implications for Restoration Activities
F. A. Fitzpatrick
Hayes D.F.Hayes D.F., editor(s)
2001, Conference Paper, Proceedings of the 2001 Wetlands Engineering and River Restoration Conference
A geomorphic study for North Fish Creek, a northern Wisconsin tributary to Lake Superior was analyzed to determine the hydrologic and geomorphic changes caused by clear-cut logging and agricultural activity. Discharge magnitude estimated with HEC-2 for full-channel capacities indicate that modern full-channel discharges are about twice as large as pre-1946...
Biogeochemistry of a treeline watershed, northwestern Alaska
R. Stottlemyer
2001, Journal of Environmental Quality (30) 1990-1998
Since 1950, mean annual temperatures in northwestern Alaska have increased. Change in forest floor and soil temperature or moisture could alter N mineralization rates, production of dissolved organic carbon (DOC) and organic nitrogen (DON), and their export to the aquatic ecosystem. In 1990, we began study of nutrient cycles in...
Constraining controls on carbonate sequences with high-resolution chronostratigraphy: Upper Miocene, Cabo de Gata region, SE Spain
P. Montgomery, M.R. Farr, E. K. Franseen, R.H. Goldstein
2001, Palaeogeography, Palaeoclimatology, Palaeoecology (176) 11-45
A high-resolution chronostratigraphy has been developed for Miocene shallow-water carbonate strata in the Cabo de Gata region of SE Spain for evaluation of local, regional and global factors that controlled platform architecture prior to and during the Messinian salinity crisis. Paleomagnetic data were collected from strata at three localities. Mean...
Selenium, selected inorganic elements, and organochlorine pesticides in bottom material and biota from the Colorado River delta
J. Garcia-Hernandez, Kirk A. King, A.L. Velasco, E. Shumilin, M.A. Mora, E. P. Glenn
2001, Journal of Arid Environments (49) 65-89
Concentrations of selenium (Se) in bottom material ranged from 0.6 to 5.0 μg g−1, and from 0.5 to 18.3 μg g−1in biota; 23% of samples exceeded the toxic threshold. Concentrations of DDE in biota exceeded the toxic threshold in 30% of the samples. Greater concentrations of selenium in biota were...
New Publications of the U.S. Geological Survey, July-September 2001
Water Resources Division, U.S. Geological Survey
2001, 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 July to September of the year 2001....
Further biogeochemical characterization of a trichloroethene-contaminated fractured dolomite aquifer: Electron source and microbial communities involved in reductive dechlorination
A. M. Hohnstock-Ashe, S.M. Plummer, R. M. Yager, P. Baveye, E.L. Madsen
2001, Environmental Science & Technology (35) 4449-4456
A recent article presented geochemical and microbial evidence establishing metabolic adaptation to and in-situ reductive dechlorination of trichloroethene (TCE) in a fractured dolomite aquifer. This study was designed to further explore site conditions and microbial populations and to explain previously reported enhancement of reductive dechlorination by the addition of pulverized...
Lessons learned from long-term ecosystem research and monitoring in alpine and subalpine basins of the Colorado Rocky Mountains, USA
Jill Baron
2001, Ekologia (Bratislava) (20) 25-30
Long-term ecosystem research and monitoring was begun in the Loch Vale watershed of Rocky Mountain National Park in 1983, after extensive survey work to identify the best location. Then, as now, our scientific objectives were to understand natural biogeochemical cycles and variability, so that we could differentiate ecosystem changes from...
