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Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
Morphometrics Of The Family Emballonuridae, Patricia W. Freeman, Cliff A. Lemen
Morphometrics Of The Family Emballonuridae, Patricia W. Freeman, Cliff A. Lemen
School of Natural Resources: Faculty Publications
Morphometric analysis revealed three distinctive groups among the genera of emballonurids. Taphozous-Saccolaimus is a group distinctive in size and shape, particularly cranially. Diclidurids are distinctive in appendicular characters only, especially those in the wing. The third group include all other emballonurids. Phylogenetic studies also separated Taphozous-Saccolaimus as distinctive but included diclidurids among other New World species. Compared with molossids, emballonurids are morphometrically quite homogeneous.
Synthetic-Aperture Radar Imagery And Digital Shaded-Relief Map Of Northwest Nebraska: Probable Structures And Geomorphic Features Of The Region, Robert F. Diffendal Jr.
Synthetic-Aperture Radar Imagery And Digital Shaded-Relief Map Of Northwest Nebraska: Probable Structures And Geomorphic Features Of The Region, Robert F. Diffendal Jr.
School of Natural Resources: Faculty Publications
In 1988 the United States Geological Survey published a radar image mosaic of an area roughly that of the Alliance. Nebraska 1° × 2° topographic map at the same scale, 1:250,000. Striking near-parallel valley trends in the vicinity of Chadron, Nebraska, may be related to jointing or possible faulting. Two sets, oriented approximately N30E and N28W, are obvious in the area east of Chadron. Sets south of Chadron on the Pine Ridge trend approximately N40E and N50W. On the Pine Ridge west of Fort Robinson in Sioux County some E-W and N-S features are also apparent. Other features that may …
Survey Of Mollusks Of The Platte River: Final Report, Patricia W. Freeman, Keith Perkins
Survey Of Mollusks Of The Platte River: Final Report, Patricia W. Freeman, Keith Perkins
School of Natural Resources: Faculty Publications
A survey of the mollusks of the Platte River was carried out during the summers of 1990 and 1991. With the exception of the Big Bend Reach of the River in Dawson, Buffalo and Hall counties, no unionids (mussels) were found in the main channel of the river. We found 11 species of mussels along the river and 16 species of snails at 49 different sites from east to west across the state. We found the Asiatic clam, a known, non-native, pest species, for the first time in the state placing it several hundred miles west of the present eastern …
Coprolite Analysis: A Biological Perspective On Archaeology, Karl J. Reinhard, Vaughn M. Bryant Jr.
Coprolite Analysis: A Biological Perspective On Archaeology, Karl J. Reinhard, Vaughn M. Bryant Jr.
School of Natural Resources: Faculty Publications
The most remarkable dietary remains recoverable from archaeological contexts are coprolites. Coprolites are desiccated or mineralized feces that are preserved in sheltered and open sites in arid regions, primarily in the New World. These dietary remains are remarkable from several perspectives. They typically contain a variety of macroscopic and microscopic remains that form interrelated data sets for the reconstruction of diets. Because contexts containing coprolites are typified by excellent preservation, the remains coprolites contain tend to be in better states of preservation than dietary remains recovered from nonfecal deposits. Coprolites also contain the well-preserved remains of intestinal parasites and pathogens …
Nonfederal Automated Weather Stations And Networks In The United States And Canada: A Preliminary Survey*, Steven J. Meyer, Kenneth G. Hubbard
Nonfederal Automated Weather Stations And Networks In The United States And Canada: A Preliminary Survey*, Steven J. Meyer, Kenneth G. Hubbard
School of Natural Resources: Faculty Publications
Not all weather data are collected by federal agencies. Fueled by the need for more specific meteorological data in real or near-real-time, the number of automated weather stations (AWSs) and AWS networks has expanded to the state and private sector over the past decade. This study employed a survey to determine the spatial extent and disposition of these nonfederal AWSs and AWS networks in the United States and Canada, the type of measurements taken, the operating procedures (i.e., maintenance and data-retrieval techniques), and the uses of the data (e.g., research, public service, agency needs). The rapid growth and expansion in …
Opportunities To Increase Tree Planting In Shelterbelts And The Potential Impacts On Carbon Storage And Conservation, James R. Brandle
Opportunities To Increase Tree Planting In Shelterbelts And The Potential Impacts On Carbon Storage And Conservation, James R. Brandle
School of Natural Resources: Faculty Publications
No abstract provided.
Why Can The Weighting Parameter Of The Muskingum Channel Routing Method Be Negative?, Jozsef Szilagyi
Why Can The Weighting Parameter Of The Muskingum Channel Routing Method Be Negative?, Jozsef Szilagyi
School of Natural Resources: Faculty Publications
No abstract provided.
Atmospheric Effects On The Ndvi--Strategies For Its Removal, Y. J. Kaufman, D. Tanré, B. N. Holben, B. L. Markham, Anatoly A. Gitelson
Atmospheric Effects On The Ndvi--Strategies For Its Removal, Y. J. Kaufman, D. Tanré, B. N. Holben, B. L. Markham, Anatoly A. Gitelson
School of Natural Resources: Faculty Publications
The compositing technique used to derive global vegetation index (NDVI) from the NOAA-AVHRR radiances, reduces the residual effect of water vapor and aerosol on the NDVI. The reduction in the atmospheric effect is shown using a comprehensive measured data set for desert conditions, and a simulation for grass with continental aerosol. A statistical analysis of the probability of occurrence of aerosol optical thickness and precipitable water vapor measured in different climatic regimes is used for this simulation. It is concluded that for a long compositing period (e.g. 27 day), the residual aerosol optical thickness and precipitable water vapor is usually …
Ectoparasitism As A Cause Of Natal Dispersal In Cliff Swallows, Charles R. Brown, Mary Bomberger Brown
Ectoparasitism As A Cause Of Natal Dispersal In Cliff Swallows, Charles R. Brown, Mary Bomberger Brown
School of Natural Resources: Faculty Publications
Nestling Cliff Swallows (Hirundo pyrrhonota) in southwestern Nebraska that were relatively heavily parasitized by hematophagous fleas (Ceratophyllus celsus) and swallow bugs (Oeciacus vicarius) dispersed to nonnatal colonies to breed the subsequent year, whereas nestlings that were relatively lightly parasitized returned to their natal colony to breed. There were no significant differences between dispersers and nondispersers in natal clutch size, natal brood size, relative hatching date, natal body mass, natal nest's distance from the colony's center, and natal nest's age. There were no sex differences in dispersal tendencies. Dispersing birds tended to move to smaller colonies …