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Page 3889, results 97201 - 97225

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Not all publications have extents, not all extents are completely accurate
Surface-water-quality assessment of the lower Kansas River basin, Kansas and Nebraska; results of investigations, 1987-90
J. O. Helgesen, editor(s)
1995, Open-File Report 94-365
Surface-water-quality conditions and trends were assessed in the lower Kansas River Basin, which drains about 15,300 square miles of mainly agricultural land in southeast Nebraska and northeast Kansas. On the basis of established water-quality criteria, most streams in the basin were suitable for uses such as public-water supply, irrigation, and...
Nitrate transport and transformation processes in unsaturated porous media
James A. Tindall, Robin L. Petrusak, Peter B. McMahon
1995, Journal of Hydrology (169) 51-94
A series of experiments was conducted on two contrasting agricultural soils to observe the influence of soil texture, preferential flow, and plants on nitrate transport and denitrification under unsaturated conditions. Calcium nitrate fertilizer was applied to the surface of four large undisturbed soil cores (30 cm diameter by 40 cm...
Wind shear stress measurements in a coastal marsh during Hurricane Andrew
J. R. Dingler, S.A. Hsu, A. Lee Foote
1995, Journal of Coastal Research 295-305
Hurricane Andrew produced changes to the Louisiana wetlands not normally observed after lesser, more common storms. For example, the <25 m/s wind speeds generated by cold fronts and winter storms, and any accompanying storm surge, do not cause substantial, wide-spread alteration of marsh vegetation. During Hurricane Andrew, however, the wind,...
Structural impact of hurricane Andrew on the forested wetlands of the Atchaflaya Basin in South Louisiana
Thomas W. Doyle, Bobby D. Keeland, Lance E. Gorham, Darrin J. Johnson
1995, Journal of Coastal Research 354-364
On August 26, 1992, Hurricane Andrew hit the Louisiana coast and traversed a large portion of the lower Atchafalaya Basin, bounding the largest remaining tract of cypress-tupelo and bottomland hardwood swamp in the United States. Permanent field sites were established following the hurricane to assess the extent of forest damage...
Pathogenicity of Steinernema carpocapsae and S. glaseri (Nematoda: Steinernematidae) to Ixodes scapularis (Acari: Ixodidae)
E. Zhioua, R.A. LeBrun, H. S. Ginsberg, A. Aeschliman
1995, Journal of Medical Entomology (32) 900-905
The entomopathogenic nematodes Steinernema carpocapsae (Weiser) and S. glaseri (Steiner) are pathogenic to engorged adult, blacklegged ticks, Ixodes scapularis (Say), but not to unfed females, engorged nymphs, or engorged larvae. Nematodes apparently enter the tick through the genital pore, thus precluding infection of immature ticks. The timing of tick mortality, and overall mortality after 17 d,...
The cumulative effect of consecutive winters' snow depth on moose and deer populations: a defence
R.E. McRoberts, L.D. Mech, R. O. Peterson
1995, Journal of Animal Ecology (64) 131-135
1. L. D. Mech et al. presented evidence that moose Alces alces and deer Odocoileus virginianus population parameters re influenced by a cumulative effect of three winters' snow depth. They postulated that snow depth affects adult ungulates cumulatively from winter to winter and results in measurable offspring effects after the...
Comet Shoemaker-Levy 9 at Jupiter
Eugene Merle Shoemaker
1995, Geophysical Research Letters (22) 1555-1556
From the 16th to the 22nd of July, 1994, the world was privileged to witness an event that probably recurs less often than once a century. Collision of the brightest nuclei of Periodic Comet Shoemaker-Levy 9 produced enormous dark clouds that were the most dramatic and easily...
Seismic velocity structure and composition of the continental crust: A global view
Nikolas I. Christensen, Walter D. Mooney
1995, Journal of Geophysical Research B: Solid Earth (100) 9761-9788
Seismic techniques provide the highest‐resolution measurements of the structure of the crust and have been conducted on a worldwide basis. We summarize the structure of the continental crust based on the results of seismic refraction profiles and infer crustal composition as a function of depth by comparing...
Mineral resources, environmental issues, and land use
Carroll Ann Hodges
1995, Science (268) 1305-1312
Contrary to predictions from the 1950s through the mid-1980s, persistent shortages of nonfuel minerals have not occurred, despite prodigious consumption, and world reserves have increased. Global availability of raw materials is relevant to policy decisions regarding mineral development and land use. Justification for environmental protection may exceed...
Biological consequences of relocating grizzly bears in the Yellowstone ecosystem
Bonnie M. Blanchard, Richard R. Knight
1995, Journal of Wildlife Management (59) 560-565
Relocating grizzly bears (Ursus arctos) from human/bear conflict situations has been a standard management procedure. Using data from Yellowstone National Park, we present components of situations that may affect the outcome of a relocation. Survival rates of transported bears were lower (lx = 0.83) (P = 0.001) than those not...
Appraising status of the Yellowstone grizzly bear population by counting females with cubs-of-the-year
Richard R. Knight, Bonnie M. Blanchard, L. L. Eberhardt
1995, Wildlife Society Bulletin (23) 245-248
The grizzly bear (Ursus arctos horriblilis) in the lower United States was declared threatened in 1975 under the Endangered Species Act of 1973 (16 U.S.C. 15-31-1544). According to that Act, the U.S. Fish and Wildlife Service had to prepare a plan to recover populations to levels where the species could...
Further evidence for a low U/Pb source in the moon: U-Th-Pb, Sm-Nd, and Ar-Ar, isotopic systematics of lunar meteorite Yamato-793169
Noriko Torigoye-Kita, Keiji Misawa, G. Brent Dalrymple, Mitsunobu Tatsumoto
1995, Geochimica et Cosmochimica Acta (59) 2621-2632
The coarse-grained lunar meteorites, Yamato-793169 and Asuka-881757, represent a new type of low-Ti mare basalt. This paper reports the results of a U-Th-Pb, Sm-Nd, and Ar-Ar isotopic study of Yamato-793169 performed as part of a consortium studies of lunar basaltic meteorites. The isotopic study was carried out on a small...
Criteria for incipient motion of spherical sediment particles
Chi-Hai Ling
1995, Journal of Hydraulic Engineering (121) 472-478
Initiation of bed-load transport of uniform spherical sediment particles on a horizontal bed in an open-channel flow is studied. On the basis of micromechanical and fluid dynamical considerations, two separate criteria for the initiation of motion are derived: one for rolling and one for lifting. Fluid forces such as drag,...
Dissolved-solids contribution to the Colorado River from public lands in southeastern Nevada, through September 1993
C.L. Westenburg
1995, Water-Resources Investigations Report 94-4210
The Bureau of Land Management administers about 9,300 square miles of public lands in southeastern Nevada that are part of the Colorado River Basin. The U.S. Geological Survey, in cooperation with the Bureau of Land Management, began a 5-year program in October 1988 to assess the contribution of dissolved solids...