Challenges and Opportunities for Increasing Diversity in the Wildlife Profession and the Wildlife Society: Recommendations for TWS in the New Millennium. Report to the Wildlife Society
A.K. Miles, A. Dominguez, R.D. Davis, R. Engel-Wilson, R. Reidinger, K. Wilson
1999, Report
No abstract available at this time...
Biogenic silica from the BDP93 drill site and adjacent areas of the Selenga Delta, Lake Baikal, Siberia
Steven M. Colman, John A. Peck, Josephine Hatton, Eugene B. Karabanov, John W. King
1999, Journal of Paleolimnology (21) 9-17
Biogenic silica contents of sediments on the lower Selenga Delta and Buguldeika saddle in Lake Baikal show distinct fluctuations that reflect changes in diatom productivity, and ultimately, climate. The pattern of the upper 50 m of the section, dating from about 334 ka, is similar to that of the marine...
Microsatellite diversity in sympatric reproductive ecotypes of pacific steelhead (Oncorhynchus mykiss) from the Middle Fork Eel River, California
J.L. Nielsen, Monique C. Fountain
1999, Ecology of Freshwater Fish (8) 159-168
Genetic differentiation between two reproductive ecotypes of anadromous steelhead found in the Middle Fork Eel River in northern California was tested using 16 microsatellite loci. Twelve of these loci showed significant differences in allelic frequency between the two Middle Fork Eel River steelhead populations (Fisher's exact P<0.05). Fisher's combined test...
Subcutaneous implantation of satellite transmitters with percutaneous antennae into male polar bears (Ursus maritimus)
Daniel M. Mulcahy, Gerald W. Garner
1999, Journal of Zoo and Wildlife Medicine (30) 510-515
Male polar bears (Ursus maritimus) have not been successfully instrumented with satellite transmitters because they readily shed collar-mounted transmitters. Seven male polar bears were captured on the pack ice off the northern coast of Alaska and surgically implanted with satellite transmitters with percutaneous antennae into the subcutaneous space of the...
Aeromagnetic legacy of early Paleozoic subduction along the Pacific margin of Gondwana
Carol A. Finn, D. Moore, D. Damaske, T. Mackey
1999, Geology (27) 1087-1090
Comparison of the aeromagnetic signatures and geology of southeastern Australia and northern Victoria Land, Antarctica, with similar data from ancient subduction zones in California and Japan, provides a framework for reinterpretation of the plate tectonic setting of the Pacific margin of early Paleozoic Gondwana. In our model, the plutons in...
Dynamic 3D simulations of earthquakes on en echelon faults
R.A. Harris, S.M. Day
1999, Geophysical Research Letters (26) 2089-2092
One of the mysteries of earthquake mechanics is why earthquakes stop. This process determines the difference between small and devastating ruptures. One possibility is that fault geometry controls earthquake size. We test this hypothesis using a numerical algorithm that simulates spontaneous rupture propagation in a three-dimensional...
Natural attenuation of chlorinated volatile organic compounds in a freshwater tidal wetland: Field evidence of anaerobic biodegradation
Michelle M. Lorah, Lisa D. Olsen
1999, Water Resources Research (35) 3811-3827
Field evidence collected along two groundwater flow paths shows that anaerobic biodegradation naturally attenuates a plume of chlorinated volatile organic compounds as it discharges from an aerobic sand aquifer through wetland sediments. A decrease in concentrations of two parent contaminants, trichloroethylene (TCE) and 1,1,2,2‐tetrachloroethane (PCA), and a...
Estimates of runoff using water-balance and atmospheric general circulation models
D.M. Wolock, G.J. McCabe
1999, Conference Paper, Journal of the American Water Resources Association
The effects of potential climate change on mean annual runoff in the conterminous United States (U.S.) are examined using a simple water-balance model and output from two atmospheric general circulation models (GCMs). The two GCMs are from the Canadian Centre for Climate Prediction and Analysis (CCC) and the Hadley Centre...
Variation in net trophic transfer efficiencies among 21 PCB congeners
C.P. Madenjian, L.J. Schmidt, S.M. Chernyak, R.F. Elliott, T.J. Desorcie, R.T. Quintal, L.J. Begnoche, R.J. Hesselberg
1999, Environmental Science & Technology (33) 3768-3773
We tested the hypothesis that the efficiency with which fish retain polychlorinated biphenyl (PCB) congeners from their food strongly depends on Kow and degree of chlorination of the congener. We used diet information, determinations of concentrations of individual PCB congeners in both coho salmon (Oncorhynchus kisutch) and their prey, and bioenergetics modeling...
Sedimentary exhalative nickel-molybdenum ores in south China
D.A. Lott, R.M. Coveney Jr., J.B. Murowchick, R. I. Grauch
1999, Economic Geology (94) 1051-1066
Unique bedded Ni-Mo ores hosted by black shales were discovered in localized paleobasins along the Yangzte platform of southern China in 1971. Textural evidence and radiometric dates imply ore formation during sedimentation of black shales that grade into readily combustible beds, termed stone coals, which contain 10 to 15 percent...
Microsatellite diversity and conservation of a relic trout population: McCloud River redband trout
J.L. Nielsen, K.D. Crow, Monique C. Fountain
1999, Molecular Ecology (8) S129-S142
Rainbow trout native to the McCloud River, California, USA (Oncorhynchus mykiss stonei) are thought to represent a relic, nonanadromous trout adapted to harsh, fragmented environments. These fish, commonly named McCloud River ‘redband’ trout, survive in their most primitive form in a small, spring-fed stream, Sheepheaven Creek, in the upper McCloud...
Anomalous increases in piezometric levels in advance of longwall mining subsidence
C.J. Booth, A.M. Curtiss, P.J. DeMaris, D. J. Van Roosendaal
1999, Environmental & Engineering Geoscience (5) 407-417
The typical initial piezometric response to longwall undermining is a decline in head due to the opening of fractures and bedding planes during early subsidence. However, in studies over two active longwall mines in southern Illinois, temporary rises in head just before subsidence were observed in piezometers constructed in low-permeability...
Large-magnitude, late Holocene earthquakes on the Genoa fault, West-Central Nevada and Eastern California
A. R. Ramelli, J. W. Bell, C.M. DePolo, J. C. Yount
1999, Bulletin of the Seismological Society of America (89) 1458-1472
The Genoa fault, a principal normal fault of the transition zone between the Basin and Range Province and the northern Sierra Nevada, displays a large and conspicuous prehistoric scarp. Three trenches excavated across this scarp exposed two large-displacement, late Holocene events. Two of the trenches contained multiple layers of stratified...
Deglacial and lake level fluctuation history recorded in cores, Beaver Lake, Upper Peninsula, Michigan
Timothy G. Fisher, Richard L. Whitman
1999, Journal of Great Lakes Research (25) 263-274
Sediment cores collected from the littoral and pelagic zones of Beaver Lake, Michigan record fluctuations in the water level of Lake Superior. Beaver Lake is a small 300 ha lake in Pictured Rocks National Lakeshore (PRNL) now separated from Lake Superior...
Calcium ion binding to a soil fulvic acid using a donnan potential model
J.A. Marinsky, A. Mathuthu, J.H. Ephraim, M.M. Reddy
1999, Radiochimica Acta (84) 205-211
Calcium ion binding to a soil fulvic acid (Armadale Bh Horizon) was evaluated over a range of calcium ion concentrations, from pH 3.8 to 7.3, using potentiometric titrations and calcium ion electrode measurements. Fulvic acid concentration was constant (100 milligrams per liter) and calcium ion concentration varied up to 8...
Late Quaternary loess in northeastern Colorado: Part I - Age and paleoclimatic significance
D.R. Muhs, J. N. Aleinikoff, Thomas W. Stafford Jr., R. Kihl, J. Been, S. A. Mahan, S. Cowherd
1999, Geological Society of America Bulletin (111) 1861-1875
Loess in eastern Colorado covers an estimated 14 000 km2, and is the westernmost part of the North American midcontinent loess province. Stratigraphic studies indicate there were two periods of loess deposition in eastern Colorado during late Quaternary time. The first period spanned...
Precocious breeding by yearling Giant Canada Geese
R.D. Drobney, J.M. Checkett, J.M. Coluccy, D.A. Graber
1999, The Auk (116) 1145-1147
Many species of waterfowl are capable of breeding as yearlings. In the subfamily Anserinae, however, reproduction normally does not commence until individuals reach two to four years of age (Rohwer 1992). Most published accounts indicate that Canada Geese (Branta canadensis) conform to the pattern typically found in other geese, deferring...
Petrology and geochemistry of late-stage intrusions of the A-type, mid-Proterozoic Pikes Peak batholith (Central Colorado, USA): Implications for petrogenetic models
D. R. Smith, J. Noblett, R. A. Wobus, D. Unruh, J. Douglass, R. Beane, C. Davis, S. Goldman, G. Kay, B. Gustavson, B. Saltoun, J. Stewart
1999, Precambrian Research (98) 271-305
The ~1.08 Ga anorogenic, A-type Pikes Peak batholith (Front Range, central Colorado) is dominated by coarse-grained, biotite ?? amphibole syenogranites and minor monzogranites, collectively referred to as Pikes Peak granite (PPG). The batholith is also host to numerous small, late-stage plutons that have been subdivided into two groups (e.g. Wobus,...
Seasonal movements, migration, and range sizes of subadult and adult Bamforth Lake California Gulls
B.H. Pugesek, K.L. Diem, C.L. Cordes
1999, Waterbirds (22) 29-36
We investigated seasonal migration patterns of three age classes of California Gulls (Larus californicus). Using band recovery data and reported sightings of patagially marked gulls, we constructed location maps for fledglings, one to two-year-old gulls, and breeding-age adult gulls during five time periods: spring migration, breeding season, early and late...
The strain in the array is mainly in the plane (waves below ~1 Hz)
J. Gomberg, G. Pavlis, P. Bodin
1999, Bulletin of the Seismological Society of America (89) 1428-1438
We compare geodetic and single-station methods of measuring dynamic deformations and characterize their causes in the frequency bands 0.5-1.0 Hz and 4.0-8.0 Hz. The geodetic approach utilizes data from small-aperture seismic arrays, applying techniques from geodesy. It requires relatively few assumptions and a priori information....
Functional convergence among pelagic sculpins of Lake Baikal and deepwater ciscoes of the Great Lakes
Randy L. Eshenroder, Valentina G. Sideleva, Thomas N. Todd
1999, Journal of Great Lakes Research (25) 847-855
The vast, well-oxygenated hypolimnia of Lake Baikal and the Great Lakes were both dominated by endemic planktivorous fishes. These dominants, two species of sculpins (Comephorus, Comephoridae) in Lake Baikal and six species of deepwater ciscoes (Coregonus, Salmonidae) in the Great Lakes, although distant taxonomically, have morphologies suggesting a surprising degree...
Chlorine-bearing amphiboles from the Fraser mine, Sudbury, Ontario, Canada: Description and crystal chemistry
K.A. McCormick, A.M. McDonald
1999, Canadian Mineralogist (37) 1385-1403
Three chemically distinct populations of Cl-bearing amphibole have been recognized in association with contact Ni-Cu ore deposits in Footwall Breccia at the Fraser mine, Sudbury, Ontario. The first population, defined as halogen-poor (<0.5 wt.% Cl) actinolite and magnesiohornblende, occurs predominantly as pale green grains and cores. These are generally overgrown...
Sources of nitrate in water from springs and the Upper Floridan aquifer, Suwannee River basin, Florida
B. G. Katz, H.D. Hornsby, J.K. Bohlke
1999, IAHS-AISH Publication (257) 117-124
In the Suwannee River basin of northern Florida, nitrate-N concentrations are 1.5 to 20 mg 1-1 in waters of the karstic Upper Floridan aquifer and in springs that discharge into the middle reach of the Suwannee River. During 1996-1997, fertilizers and animal wastes from farming operations in Suwannee County contributed...
Relation of streams, lakes, and wetlands to groundwater flow systems
T. C. Winter
1999, Hydrogeology Journal (7) 28-45
Surface-water bodies are integral parts of groundwater flow systems. Groundwater interacts with surface water in nearly all landscapes, ranging from small streams, lakes, and wetlands in headwater areas to major river valleys and seacoasts. Although it generally is assumed that topographically high areas are groundwater recharge...
Setting the stage for a sustainable Pacific salmon fisheries strategy
Donald D. MacDonald, Cleveland R. Steward, E. Eric Knudsen
E. Eric Knudsen, Cleveland R. Steward, Donald D. MacDonald, Jack E. Williams, Dudley W. Reiser, editor(s)
1999, Book chapter, Sustainable fisheries management: Pacific salmon
Salmon and steelhead Oncorhynchus spp., have been keystone species for ecosystems and human cultures of the North American Pacific coast for cons. Yet, in the past century, many populations have been greatly diminished and some are now extinct-the result of a combination of factors, including habitat loss and degradation, overfishing,...
